Rear derailleur jumps under load. Rear derailleur out of adjustment.
Rear derailleur jumps under load New. Again, when I am on the bike stand and there is no load I need some help understanding how to solve the issue of chain skipping in my bike. (For reference, road bike with Shimano 105, 52/39 and 25/12) Throughout the ride it dropped a few more times - generally under some form of load. Open comment sort options. I am still understanding how to fix my bike on my own. It's a little two piece thing that clamps in place. That requires the GS. Sadly, Shimano Claris groupsets don’t offer you disc brakes. , the P in the PV product) is small enough, so much so, that the advantage of having a bearing over a bushing in that guide pulley is lost on most For a better protection of the derailleur in falls provides the new Overload-Clutch. It shifts fine in all gears except when load is put on the wheel (when riding). Probably best to take it to a shop to do this. But, most commonly that is caused by the rear derailleur being slightly out of alignment. Lately I've been climbing hills and shifting the rear derailleur under heavy load to maintain speed. Ensure the cables are tight and smooth. Remove the chain and do a close inspection of the teeth on your chainring. 9. Make sure your front derailleur is installed between 1 – 3mm from top of chain ring, and proper tension is applied. Post by ryder2012 » 20 Apr 2024, 6:16pm. 2. It's as if the chain jumps the gear and gets back in (I can't quite see it since I'm riding). tensions the chain on the bottom side. I'm re-building my bike after an accident, so it's possible that something was bent though I The cassette, derailleur, chain and chain ring are all new. And obviously you haven’t touched sram 12 speed because adding 4 more links wouldn’t get half way down the 3rd maybe a slight tighten of your derailleur adjuster barrel Mine might still jump in turbo small gear under load, I just don't test it anymore, had enough drama so tend to stay in 2nd ring up. Some people try adding something like a wolf link to move the rear derailleur back enough to fit the 34 tooth cassette in (ie more b tension range) but you wouldn’t have enough cage to wrap the excess chain and handle all that range with a short cage derailleur. Add a Comment. There is one set of hills I ride called the humps that varies considerably. However, the rear derailleur immediately jumps back into the inserted gear. These are things I have experienced that have caused chain skipping under load: Running a new chain with a worn cassette. The cassette looks decent. Try backing out the barrel adjuster on your rear derailleur 1/4 turn at a time and I have a problem. I've taken several steps If your cables are pretty tight but the rear derailleur keeps slipping under load, you should consider checking the derailleur hanger. The result is disturbed cable tension which leads to chain slipping. Shimano 105’s rear derailleur can run with an 11-speed system and has smaller jumps, thus easier to shift. One example is the Protean two-speed derailleur available on the Whippet safety bicycle. Next, check the derailleur. Some times twice in quick succession. Took the bike back into my shop and I checked the drivetrain w/ the SRAM tool and it was in spec to the center of the pulley wheel but the B tension was loose and any ajustment to that made the shifting worse. Lectric's If everything is fine, but under load like going up a hill it happens, then it’s definitely the derailleur hanger as the cause. It seems like it's coming from the rear cogs and sounds similar to chain noise. It is not related to shifting. Good luck! Tried that, I can only feel the popping under load, more importantly under torque. Even while out of the saddle, in full Turbo mode, with the rear brake on, the derailleur was able to fire off each shift with zero complaints. No products found. Today I was riding (flat-out) up hill, and went to shift up a gear on the rear, which caused the chain to drop off the front chain-ring (was in the big-ring, so dropped to the outside). I can only The chain jumps while under load only on a few smaller cogs. OFTEN rear derailleur can get a bit twisted or bent. 10 Latest Closer inspection revealed that the large rear cog is definitely worn: The rear cassette will be replaced. How to get Rear derailleur aligned and That post doesn't give any numbers on the load (i. Zero miss-shifting. I looked at FD last night and adjusted there was some rubbing there, I adjusted and in cases where there is no FD rubbing I still get the noise almost sounds like skipping combined with rumble popping and/or grind. 10-06-2010, 09:35 PM . Clutch Mechanisms. My derailleur is a Shimano Tiagra short cage model and I have a double chain ring. This bike's rear derailleur did not have a b-screw, so I replaced it and fiddled with the b-screw a few times but no luck - it still skips on 2 and 3. Nothing seems abnormally worn. I recently adjusted the derailleur as it was not shifting to all the gears. Also, 10 clicks seems like too much, and when are you adding it? You should put the chain/shifter on the smallest rear cog, undo the cable at the derailleur and then phyically move the gears up and down the cassette whilst pedalling (by hand). Lean it against something or put it on a sturdy stand with a strap holding the back brake on, then lean hard on the pedals (alternately) by hand, flick the rear derailleur etc. ORIGINAL POST : I’ve recently noticed a problem with the front shifting on my 2019 Giant +1 check something in your drive chain. Always set the front derailleur tension on the small chain ring. The derailleur hanger can be checked for straightness / alignment using your own eyes to verify that the chain as it runs through the tension and jockey wheel pulleys is also parallel with the plane of the cassette sprocket. If one of these is split/damaged, it will catch the chain when in certain gears, and cause the derailleur to flex forward and then violently snap back when the chain becomes unstuck as the chain passes under the bottom of the chainring. It does not happen ver Jump to Latest 28K I'm having an interesting problem when I pedal under load. Check the structure of the rear derailleur hanger. If you think about it the harder you are pedaling, the higher the chain tension is between the chainring and cogs on the top side. @ Bill, sorry it is an SLX derailleur, 9 speed Shimano rear cassette, 9 speed 6mm shimano chain. R= Number of teeth on largest rear cog. A bent or unaligned rear derailleur can disturb the tension in shifting cables, which Jump to Latest 7. Save Share Reply Quote Like. Ideally, the chain should jump smartly to each cog both up and down, and seat solidly on the cog. A tune-up fundamental SHOULD be the proper alignment of the rear derailleur hanger. 14 millemeters of spacing between them. Jump to Latest 11K Well, from a couple of rides over the weekend it appears this issue for me seems to happen when shifting under a load. The result is disturbed cable If your derailleur hanger is straight you may need to adjust your high limit screw to stop the derailleur just below the smallest cog. Lubricate the cables if they are sticky. Make sure your rear cassette is not worned out, this will cause misalignment issues. If it’s not a straight line, something is probably wrong. Now it shifts very well. Re-set your high and low limit screws, shift the chain to a middle rear cog, run your barrel adjuster out about half way, disconnect cable, pull finger tight and tighten cable clamp. Use only the 42 for the equation. To check if the rear derailleur is in alignment, look at the e-bike’s rear wheel. Force 22 Rear Derailleur. @stripes snap a pic of your bike in 12th so we can see the chain It doesn’t address the clutch strength but addresses the rear derailleur spring strength: The overload clutch ensures better protection of the rear derailleur in case of falls. I started developing what I call a "creak" when I was pedaling under load, especially grind up steep hills in a low gear. Rear derailleur shifts well on stand but skips under load . Without a narrow wide front chainring, I’m assuming that once you start picking up speed on the descents, the bumps in the road rock the Rear derailleur is Shimano Tiagra 8 speed. You’ll need to loosen this screw before you can turn it and make any A chain that is too long is more likely to skip or jump between the bike gears. The rear derailleur is a marvel of engineering, combining precision, durability, and adaptability to enhance the cycling experience. If the shop doesn't use a Park Tool DAG-1 [derailleur hanger alignment gauge], or some other manufacturer's, to inspect, verify, and correct the relation of the hanger to 3 different points on rim of rear wheel at 180 and 45 degrees apart it is throwing parts at a bike. The rear does not have this problem since the rear der. Improve this answer. The 2024 Pinion Gearbox Is A Derailleur KILLER - Shift Under Load, No More Gripshift! Share Sort by: Best. I recently had this same issue on a change to a new cassette. Ah the issue may be that this is not a clutched derailleur so when you land your derailleur extends to the max distance then twists into the wheel since it is at its weakest point when it extends like this. Follow answered Mar 21, 2020 at 19:48. It doesn't change gear but each jump is very unsettling and a loss of power. . Update #2. It took much longer than anticipated for Shimano to come out with a 12-speed mountain bike drivetrain, and even when they did release the details of the new XTR M9100 group it was still nearly a So not only did I had to replace my rear derailleur but my front chain ring. Cycling; ↳ Does anyone know He also had a catastrophic rear derailleur failure while under light load, his mechanic told him it was something to do with the spring inside the der. Fortunately, this is one of the simplest problems to identify and correct. Again thank you for the response! For all their simplicity, I still learn something new about bikes everyday. The rear cog set has 32 tooth largest cog. Here are some other possible suggestions - good to get some views on these: Chain Noise Under Load. Finally, ensure that I'm on my 3rd ride of Canyon Strive CFR (it's great) and my chain is jumping and not engaging when I pedal hard in the smallest two cogs. NoCo Rider NoCo Rider. Drivetrain started skipping on two smallest cogs under load (sound is coming from the rear) so I did the following: 1) Checked chain length 2) Checked B limit with SRAM tool at sag point, checked low/high speed settings The fix: adjusting the derailleur. I finally dared to fiddled around with the rear derailleur the weekend and it adjusted the tension with the screw on the derailleur as you explained. Rear Derailleur: Shimano SLX RD-M7000-10 SGS, Shadow Plus, 20-speed while the 1x is much less efective at dropping gears under load. However under toque on the lowest gear (smallest cog) the chain will skip. 6-speed Shimano 600 RD Arabesque rear derailleur on UPDATE : ok so I finally got a new FD, did a straight swap andit works as expected, no issues shifting down under load. Visual check of the chain and cassette was fine, derailleur hanger looks aligned, no skipping/jumping in the chain when I backpedal. Shimano RD-RX812 GRX. Joined: Oct 2010. Credit I asked a couple of questions about this a few weeks ago. Current 1x are great, The point of multiple front sprockets are for road bikes to have fine gear adjustment in the rear with broad jumps in front for going uphill / flat / downhill. Now my rear derailleur is a bit off since I'd adjusted it to the cassette's old position. As an aside, I think mine started dropping the chain after knocking the rear derailleur. The new I've recently noticed that my chain continues to slips under high torque. or jumps over that cog into the wheel spokes, you need to adjust the lower limit screw in a similar fashion to the upper limit screw. Octopuss Discussion starter. On some modern cassettes with large gear jumps, like Shimano Posted: Sep 27, 2010 at 21:24 Quote: Rather good chance your derailleur hanger is bent. I think. Under load, it will jump out. How to Fix. Once bent, the derailleurs and pulleys are not going to align with the sprockets. 3. After riding the bike for about a month I started having my chain drop or skip in the lowest two cogs under load or aggressive riding. Hi, My carbon road bike has developed an odd, definite click-click (say 3-4 clicks per crank revolution) from the either the cassette (I think, or from that area at least, maybe rear derailleur) or BB under moderate to high load/acceleration. i tried but to be fair, this clunk only happens when the chain is under load from pedalling, and its almost impossible to get a video Jump to. If you find the upshifts are getting slow or noisy then turn the adjusting barrel counter-clockwise a quarter turn. You've checked the derailleur hanger, so #1 is less likely. 0 is the SRAM rear derailleur choice. If your My rear derailleur is making some noise and I'm having trouble diagnosing the cause. Loose cables can cause the derailleur to misbehave. It decouples the rear derailleur under extreme loads for a short time, so that it can avoid the load and the electric motor is protected from damage. Verdict – Shimano 105 has a superior derailleur architecture that offers more cable tension and is easier to shift. This is a frequent problem because derailleurs are made up of fragile materials that can be easily damaged due to mechanical pressure. What I did was to tension up the cable for my rear d via the barrel adjuster, making sure to check for correct shifting on all cogs. The bike is a KTM ultra Flite from 2010 with 9-speed cassette Shimano HG50, rear derailleur Shimano Deore XT Shadow and front derailleur Shimano Deore with 3 speeds. When you do that, you could then give the chain-rotation method a try. If it is not aligned properly, use a derailleur hanger alignment tool like this to easily adjust it. To avoid common issues like uneven wear on the chain and cog teeth, make sure you have proper derailleur alignment, which can be checked through visual inspection for derailleur It shifts perfectly and I didn't have to make any adjustments to either derailleur. Transition Smuggler - Manitou Mezzer Pro - Manitou Mara Pro Piggyback - SRAM X0 Transmission If not parallel, you might have a bit of fore and aft shifting under load. Rear derailleur hangers in most modern bikes are made of fragile materials. Mid gear jump sounds like B-Tension as others have said. Freehub engagement problem. A bent hanger is always something to look for if you’ve either crashed your bike or it’s fallen on its drive side. Indeed the harder you push, the smoother the shift. Background: No skipping previously but I noticed a missing roller from original chain so I swapped in a new chain. 1852 posts Jump to Latest 24K Often a grinding feeling can come from your b-tension allowing your rear derailleur to come too close to your rear cassette. DIY MTB Pro Tip: Do you think you need to tighten your chain? When you accelerate you are effectively feeding a lot of chain to the bottom of the derailleur and cassette / rear cluster quickly, and if the chain is stiff, it'll miss several of the teeth and jump about. This simple move lets you release chain tension swiftly. Probably not causing the issue by itself, but it's not helping. Due to its The cogs your rear derailleur shifts across can have as little as 2. High cadence spinning doesn't reveal the symptoms. The alignment of the derailleur looks perfect and it shifts into and out of gear like a dream. The motor seems to try, but the shift just doesn’t complete. Still gotta go test it under load though – This can cause the derailleur to become misaligned or bent. Thanks all for the advice. ORIGINAL POST : I’ve recently noticed a problem with the front shifting on my 2019 Giant The cogs your rear derailleur shifts across can have as little as 2. 142x12 mm E-THRU 12 The first thing to do is check if the rear derailleur is bent. Same. When I take off at 21 or 23 out of 12-25 rear, the crank arm jerks forward a bit at times. And under moderate to strong peddle input I will get what is best described as a "POP" and a quick 10 degree slippage down. If the chain is trying to jump between gears, that could be causing the slipping, but it will have a very different fix. A modern road bicycle drivetrain with front and rear derailleurs. Seemed like the problem was better for a while, but it came back. The bike measures 16-3/8" from the center of the rear axle to the center of the Another cause of skipping I spotted is the b-screw adjustment on the rear derailleur. This is a small screw that you’ll find just below the cage of your rear derailleur. This is Either the rear derailleur hangar is out of alignment, the rear cassette is worn, or chain wear is responsible for erratic gear shifting. 1,379 4 4 silver Commented Mar 26, 2020 at 21:13. There is a bit of forward/backward play in the derailleur when back-pedalling but I think it's OK. This is a way to replicate the way some things some things sit differently under real tension – But as soon as it's under load in PAS 3 (out of 5) it will barely pedal without the banging of the skipping gear. Is it bent? A bent hanger needs straightening. This feels like a good compromise between speed and stress on the drivetrain. , the P in the PV product) the guide pulley has, but the post seems to suggest that, though they spin very fast under load, the load value (i. 7 out of 5 - 112 reviews. Pushing The Rear Derailleur Forward. Shifting to higher gears is smooth, but shifting down to lower gears is a struggle. particularly under load, by reducing flex in the derailleur’s attachment point. Although I would look at the derailleur cage or body. When some teeth are worn or damaged on a gear, the teeth won’t hold onto the Jump to Latest 16K 2006. 2 INTRODUCTION This user manual contains information needed to ride your Orbea bicycle safely and get the most out of it. Is it bad for the components? Depends on how much load as to how much it will wear it will put on a cassette, but it's not as bad people make it out to be. I'll re-adjust and see where I stand. Smith-Sights Atypical. I got a notch in my front derailleur which chews and snaps chain - so check front and back drive-train. The derailleur looks straight vertically to me. Skipping involves the chain jumping over the tops of the sprocket teeth under load. If you suspect a derailleur is to blame for your bike chain slipping, start by visually inspecting it. Under very little or no load it doesn’t rub. Part of the Sram new mechanism is the delayed rear derailleur movement. ” Imagine you could remove all the space and distance between these parts and make a straight line. A worn rear hub could cause a wobbling or light tilting in the cassette while under load. no down-shifting under load and no problem shifting up under load). Chain slip can be a hassle to diagnose because it only happens under load. Improve length finally going to the derailleur. As an extremely positive side effect, the rear derailleur suspension and the derailleur hanger are better protected in the It's odd as it just happens when under load (indoor direct drive trainer) - when I'm doing a route that is sustained 6% grade (or more) I can't shift to big ring on the front. I managed to file the part of the derailleur hanger touching the support of the derailleur where the B-screw is, to shorten this distance even more. The second thing to make sure you have adequate cable tension, proper cable installation and My shifters are Tiagra 9 speed flight deck. Follow by re-adjusting the limit screws on the rear d. Bike specs: Specialized Fatboy Trail SRAM XG-1150 Cassette SRAM GX 1x11 Rear Derailleur SRAM 11 speed chain RaceFace Cinch Chainring 28t RaceFace Turbine Crank When I’m on the big ring and smallest and 2nd smallest rear cassette ring, my chain will rub the front derailleur when I put power down. Measure your chain also. In this article we discuss the various reasons why your chain might be skipping or jumping gears, how to properly Adjust Your Derailleur. The other day, I upgraded to X01 Eagle mechanical and what a difference it made. whenever it was asked to shift under extended load the derailleur always delivered. Hawk Racing I experienced the exact same issue as you when I install fresh cables for my mtb. It seems to me that its coming from the rear freewheel/derailleur. Generally you would find a spacer in the back of the dropout that locates the axle forward slightly. Rear derailleur pulley sticking when pedaling in reverse. I When under a load it will sometimes do the following on the double click: 1) The chain will move up two cogs and then drop back down one cog (to where I wanted it to be on the shift) 2) The chain will move up to the next biggest cog (like I want it to) on the double click, but the chain doesn't immediately engage the rear cog when it gets there. The rear derailleur is attached to the frame with a hanger. Turning a barrel adjuster or resetting cable tension and re-indexing the g When the chain skips under pedaling load this is often called “ghost shifting” or “phantom shifting”. Clutch mechanisms are a feature in many modern derailleurs, especially on mountain bikes and gravel bikes. SRAM Eagle XX1/X01/X1 Rear Derailleur B-Bolt/Limit-Screw Kit It offers a 460% range, and if paired with the right front ring, you should be able to climb anything. If necessary, take your bike to a professional for a tune-up. Rear derailleur out of adjustment. This page provides troubleshooting tips for Shimano gears on bikes. Haha you have no idea what your talking about lmao, an oval doesn’t affect how much the chain is pulling the derailleur. Yeah with 50/34 and 11-32 you need (50-34) + (34-11) = 39 teeth capacity. It temporarily decouples the rear derailleur under extreme loads so that it can evade the load and the electric motor is protected from damage. A clutched derailleur will resist allowing itself to full extend outside of what is needed to shift to the selected gear. Forum Jump: Go. If you follow the manual it should be pretty much impossible to drop the chain going from small to big - even under load. I don't do it jumps around the cassette (usually at the critical part of the climb when I'm putting the most pressure Rear Derailleur . Check clearances and look for odd behaviour in the rear derailleur. Bike shop took 3+ weeks to Jump to Latest 54K So with his help, I replaced the entire rear derailleur cable and housing, and lubed the new cable. Best. But what it still miss is that it couldn't (in a highly effective way) force the chain to stay on the cog until it reach the ramp. Jump to Latest 16K Plus shifting under load is very loud and not the smoothest. Some frames can flex under stress and pedaling hard from a full And you are def correct about the shifting, most of the gears were fine but at the lower end they would jump under load. I have a mountain bike where the chain intermittently skips when put under load on the middle (and very rarely on the smallest) chain ring. For a rear derailleur, the derailleur, derailleur pulleys and selected chain ring should always “line up. I have an older mountain bike with SRAM X9 rear deralleur, SRAM PG990 rear cassette, new 9spd chain. 1 2 When the bike was built new 2 years ago I noticed under high torque I would get some rear derailleur noise. They bent it back a little, but said it was still off a bit. It seems to be indexed correctly no noise and shifts crisply on the stand. [4] The French bicycle tourist, writer and cycling promoter Paul de Vivie (1853–1930), who wrote under the name Vélocio, invented a two speed rear Hi, I've just got 2 SRAM X9 rear derailleurs (2010 model) for 2 of my bikes. The issue popped up suddenly during a ride. 5 Brakes Avid BB5 Disc Brake Levers Tektro Alloy, 2 Finger Cassette SRAM PG830 11x32, 8 I had the same problem on a 105 derailleur on one of my bikes. Secure your derailleur is aligned correctly and the chain is not too loose or tight. In fact, this is so prevalent that it can occur even in many brand-new bicycles. The new chain was matched up with the old chain right out of the box. In the One of the most typical causes of a skipping chain is a drivetrain that needs an indexing adjustment. Q&A. I'm Jump to Latest 8. And more recently the derailleur isn't moving down from the large cog to the smaller ones very The axle should not be that far back in a horizontal dropout with a derailleur. When I ease of the pedals when shifting in the back, the shifting in the rear derailleaur is much more consistent. Like the transmission groupset, the cassette shifts the best under load and force. a common problem is if you get skipping while pedaling up steep grades or under load. If your bike has ever toppled over onto gear side, crashed or been badly packed, the rear gear hanger going out of alignment. When I put the bike in the highest gear, the chain starts to touch a part of rear derailleur. Thread starter Custom24; Start date 14 Aug 2013; put the old chain back on, use it until it starts jumping, then replace chain, cassette and front chain rings together. It only happens under real torque when accelerating, smooth climbing seems to I'll have to check that out too. I am in like the 19t or 20t cog while in the big ring. I Jump to Latest 12K Under heavy load, no matter what chainring I am in the chain will seem to skip a tooth. I'm using a Shimano Sora groupset, and my technique is to press the lever just before crank arms are vertical so the shift happens in the 'dead zone' between strokes. Reason 1 – A Loose Chain. Various derailleur systems were designed and built in the late 19th century. I adjusted the B-tension screw both ways and it still slips. Old. This can usually be spotted through looking at the cassette and rear gear from the rear of the bike. Jump to Latest REVIEWS EDITORIAL DEALS 21 - 27 of 27 Posts. Hard to tell, but it feels like it is trying to jump up to a lower gear. The shifter is an alivio. 13 thoughts on “ How to fix ghost shifting under load bicycles ” evidencemutumbu says: August Fixing a Chain Skip in the Rear Derailleur. Just bought a bike a few weeks ago. Yes, this is called " eyeballing it " but is a first check and can be done without the hassle of a Park alignment tool. I replaced the cassette with a new larger 52T GX cassette, replaced the shifter and derailleur with X01 and XX1 chain, and now my drivetrain is even better (just more crisp and sharp shifting, not that it was bad before by any means but it’s even better now). New PG-1170 SRAM road cassette, DT hub. In this post, I’ll take a look at exactly the seven possible reasons why your bicycle chain is slipping, and the fixes for each. HOLY SH*T!!! This is getting annoyingand I'm starting to wonder if it's possible for ANY MTB derailleur to shift flawlessly, under load, I second this. This should put you close enough to adjust the jumping chain with the barrel adjuster/adjusters. It temporarily decouples the rear derailleur under extreme loads, so that it can avoid the load and the electric motor is protected from damage. And if cable 1 crossed any (it being the brake cable I’d replaced) then they’d have a lot of frictionand per my stated observationthey don’t shift under load BUT when manually releasing the tension by hauling the derailleur into position by hand—they work just fine. It is no measure of health to be well adjusted to a profoundly sick society It shifts perfectly and I didn't have to make any adjustments to either derailleur. The failure to follow the instructions DEORE REAR DERAILLEUR. So, I bought a new hanger to replace it. I’ve got a SRAM Rival eTAP AXS derailleur that’s acting strangly. After the chain jumps, it remains on the same sprocket. Hi, I've just got 2 SRAM X9 rear derailleurs (2010 model) for 2 of my bikes. CN-M6100 SHIMANO DEORE Rear FREEHUB for Disc Brake. I thought both of the oem items were slightly bent - and they were but it was very slight and the new items didn't fix the issue. If you experience a massive bump or pedal under pressure, there’s a good chance that your rear derailleur hanger may be bent or is out of alignment. The chain had a stiff link where I joined it, but that got resolved. 2) Bought and replaced the rear cassette. A dirty chain does more damage than shifting under load. You can adjust the tension on your rear derailleur by adjusting the barrel adjuster. These are commonly aluminum but may also be steel. I have a 2 ring setup, and it didn't seem to matter what ring I was, and what cog on the rear cassette for that matter. It was shifting poorly under regular load initially, now just under high load. Putting load when in middle chainring/small sprocket caused the chain to jump onto the small chainring. No problems in any other gear. If you can move the derailleur by hand and the spring tension brings it right back, then there’s a If you have just replaced your chain and not your chainrings, and your chain skips under load/pressure (like pedaling up a hill), replace your chainrings or take your bike to your local bike shop. As an extremely positive side effect, the rear derailleur suspension and the derailleur hanger are better protected in the Definitely shifts better under load than mechanical. The gears shift fine, no noise no issues. Thanks to everyone for the tips. If the chain is continuously skipping or in other words failing to fully climb onto the desired cog, the sources of the problem are the rear derailleur’s alignment or improperly indexed gears. Shifting under load - I don't shift under load There are a couple issues which it may be due to, but I can't be sure: The 105 rear derailleur doesn’t have any kind of clutch to keep it from bouncing. That post doesn't give any numbers on the load (i. bake0408 New Member. Badly worn chainring. especially under load, and is particularly bad as I am shifting to a lower gear (to a smaller cog, on the rear). 3K This is simply because there is not enough spring tension in the der. Three times, however, when putting it under stain (once on a modest hill climb, once starting from a stop sign in a fairly big gear, and once on an acceleration coming out of a sharp turn) it skipped several teeth and caused my foot to slam down hard. It seems snug with the right angle through the derailleur. COM. parallelogram detaching or something like that. Top. If anyone can help, feel free to let me know. I could reproduce this sitting or standing. Turn the high limit screw clockwise roughly half of a revolution, then gently turn the pedals to see if the chain stays put on the highest cog. But I'm not too convinced your shop knows what they're Early on I brought the bike into the shop, and they tested the rear derailleur hanger and said it was a bit bent. 9K (2017 Scott Genius) from 11 speed SRAM GX drivetrain to SRAM GX AXS 12 speed (new cassette, derailleur, chain, shifter). My guess is the derailleur is guiding the chain just slightly between two gears and going full load puts enough tension on the chain to cause it to want to shift gears resulting in a skipping feel. Crashing or throwing the bike down on the right side can bend this hanger. I have done some research and a couple things already to try and fix this. 8. The chain behaves a bit better but still jumps from time to time from the front cog. The Shimano choice for best rear derailleur is Shimano RD-RX812 GRX, while SRAM Rival Type 1 3. Use chart below to find decimal measurement. I would also check the cables while the bike is mounted on the stand and see that the clamps or the bike position (handlebars sitting at a hard angle, pulling on cables) are not somehow affecting the tension in the derailleur cable. to shift the chain under a high load. The rear derailleur like this one is more commonly affected than the front one. The drive train is completely silent in the maintenance stand or when stationary and applying torque to the crank arms. Read it's strength, weaknesses, shift well under full load (I'm 5'8" 215 lbs), and has taken some falls on the ice without missing a beat. I have a SRAM Red cassette and under load going up a hill or something, I am finding that my gears are jumping. Remember, your bike will not shift on the stand like it will Bent Or Wonky Rear Derailleur Hanger. Hope this helps. So you still actually haven't checked hanger alignment with the proper tool. e. This solved my skipping issue. Jump to Latest 15K It can shift pretty well under load too. FIND A DEALER. Posted by u/Seachicken - 6 votes and 13 comments Cool. Make sure your derailleur hanger isn't bent. I replaced both cogs, chain and derailleur (including cables). Rear Derailleur Adjustment. The more power I put down, the more it rubs (the rubbing gets louder with more power). B screw was loosened to the max, and I was still too far from the sprockets compared to my other bikes. so I don't need to worry about the derailleur. Or derailleur itself is twisted a tiny bit. It happens on either leg driving the force. The chain jumps while under load only on a few smaller cogs. However, the rear derailleur immediately jumps back into the engaged gear. In some cases, chain skipping may be caused by a poorly adjusted derailleur. Swapped in the rear wheel from my road bike. Rear Derailleur SRAM X. Exactly then how do you shift going uphill when your cadence starts to fall off? and your cadence 3 Bent Hanger. In this tutoria Definitely noise under power on larger rear cogs, noise is coming from rear derailleur. 4K I will remove the rear wheel and derailleur and redo everything as well. If it is, get it un-bent - it is near impossible to adjust a rear derailleur which is bent adequately. Hope that helps those facing the same problem down the road (i. Controversial. However, the If you could take a video of the rear derailleur cycling through the 6 cassette sprockets that gears clunking. I did bump the derailleur on a trail feature halfway through the ride, but this started before If I increase the torque the chain seems to jump or click around the rear pulley area. This will bias the rear derailleur towards the downshift. You can realign the rear derailleur by rotating the nut that connects the shifter cable to the derailleur. Ensure it is aligned properly. It is quite discouraging to say the least and unnerving if in a race type 1) I took it into the shop and they bent the derailleur hanger straight. How about using the battery charger with the etube software and using the adjustment screen to get the rear derailleur back into the "neutral" position of mid adjustment. Posts: 3 #1. Oddly, if I give the derailleur a little nudge or loosen the chain, it shifts fine. It all started after I hit a Having trouble getting your indexed gears working properly? It's not always cable adjustment that is required to make them function correctly. Nothing fancy, but one with 7 speeds. Usually, you would also experience slow and noisy shifting in the rear gears, not just the pulley derailment, and usually it would be preceded by a worn chain. New chain jumps under load. I'd say slightly twisted along the horizontal (rear bias), with a very slight down-turn. My rear derailleur is making some noise and I'm having trouble diagnosing the cause. The chain is new. In the 9070 system the range is +12 to -12 so set it to 0. Mine might still jump in turbo small gear under load, I just don Closer inspection revealed that the large rear cog is definitely worn: The rear cassette will be replaced. Anybody else having chain slip? Am I missing something? It's only in top gear under heavy load but I can look back and watch it slip teeth when it happens while staying in top gear. Each shift is precise and smooth, especially under load. I had a super reliable all GX drivetrain before and it was excellent. This helped quite a bit. Look at the derailleur hanger. An off-track derailleur causes gear issues. I do not A modern road bicycle drivetrain with front and rear derailleurs. This went away and I forgot about it. I have cleaned and re-lubed the chain, cables, and derailleur scrupulously. [4] The French bicycle tourist, writer and cycling promoter Paul de Vivie (1853–1930), who wrote under the name Vélocio, invented a two speed rear Is the cable getting tugged slightly due to frame or wheel or suspension flex/movement under load? Best guess is you could have a little more room on you low limit screw, like, 1/4 turn or less. Chain is KMC 9 speed. It slaps the chainstay and jumps. Just turn the barrel adjuster knob on your shifter a bit one way or the other and it will probably go away. Amanda P Legendary Checking The Derailleur. Still throwing parts at it - new DR Hanger and new Deore rear derailleur. A slightly bent hanger can cause weird things especially since you're saying it also happens under high load so you may be getting some frame flex that puts you over the edge in that gear. Guide your bike back to smooth rides by giving your rear derailleur a nudge forward. This is usually caused by wear to the chain and/or the sprockets, and is most likely to happen on the smaller rear sprockets, especially if they are used in conjunction with the small chainwheel in front Could this be something completely unrelated to the derailleur altogether like a chain defect? [Problem Solved]: My local bike shop found a wobble in the freewheel which allowed the chain to sometimes catch on, and attempt to climb to the next largest sprocket before clanking/popping back once the angle of wobble changed again. But impossible for me to spot. It changes gear or just slips/jumps when under load, which makes it very difficult on hills. If it's just a bit off, you can play with the barrel adjuster either at the shifter or at the derailleur. , the P in the PV product) is small enough, so much so, that the advantage of having a bearing over a bushing in that guide pulley is lost on most That dreaded noise that everyone fears when the chain passes over the front derailleur may we’ll take a closer look at the different causes and possible solutions to fix a slipping bike chain and when they jump under load and The other reason why your bike chain skips are due to dirt accumulation in the derailleur or bike rear When the chain is at the smallest cogs both rear and front, then some times (depends which mood the bike is in that day), the chain jumps when I go from soft to harder pedaling. Another cause of such problems is a bent rear derailleur "hanger", the part that the derailleur attaches to. Another way you might fix a skipping bike is to look for a bent or misaligned derailleur hanger. I'm re-building my bike after an accident, so it's possible that something was bent though I Adjust derailleur and cable tension. Shimano Deore Rear Der Derailleur user reviews : 3. Conversely, a short chain would be a hassle to fit around your gears and is more likely to snap while riding, so getting an adequately-tailored bike chain is pertinent. The popping is your chain trying to change gears because That’s because it’s really optimised to shift under load. d) Brakes. SHIMANO. Bike gears slip under pressure because of one of seven reasons. I don’t mean it shifts cogs, as far as I can tell, but feels like it gives way and skips over the teeth on the derailleur jockey wheels. Rear derailleur too far out. If the alignment from the sprocket through the rear gear isn’t at 90 degrees to the ground, your bike may have a problem. The chainrings are UPDATE : ok so I finally got a new FD, did a straight swap andit works as expected, no issues shifting down under load. Huge improvement, the gears now shift easier! However, I had to find a compromise because with the cable rather tight, the lower gears shift smoothly, with the cable rather loose, the higher gears shift smoothly. This can cause the derailleur to become misaligned or bent. Ultimately, he had to buy a new RD, and has had no trouble since. Example: A bike has a 42-32-22 front chainring set up. Update: I rode with the 1mm spacer behind the cassette, and the noise from the cassette is hardly there. Check does your rear derailleur cog line up correctly with your rear cogs? Applying some gentle brute force to rear derailleur can help. Share. The SRAM manual is really easy to follow and there are alignment markers on the front derailleur to help set up. The last one isn't actually the Even worse than this, the chain will jump off the guide pulley intermittantly and get jammed between the pulley and the chain guide plate causing the derailleur to jump and snap back intermittently. Shifts like a You may be cross-chained in your climbing gears which will make that grinding noise under load. To fix a skip in the rear derailleur, shift your chain into the smallest ring on your rear cassette (the hardest gear) and the middle or larger ring on Jump to Latest 4. Shifts up and down under load; Available in 10-51; MORE INFO ON BIKE. (my bike is 6+ years old so figured the sprockets might be worn from what I have read on other posts) 3) My chain is also new. S Highest gear "jumps" under load. Swapped the original wheel back, then swapped in a PG-1110 chain fresh from the package with factory grease. This is the plate that holds the rear derailleur in place. Or despite what the tool says, your b tension gap is fractionally too big, so let that screw out a tiny amount. In another thread about a Sora/Tiagra shifting roughly, Bikeboy said "don't shift under load" Around here, we have some hills that are not constant grades. But it is possible, especially if the chain has recently been changed. Posted: Oct 10, 2011 at 18:05 Quote: I have noticed when i pedal up-hill in a high gear (heavy load), i have a problem with my gears grinding without any shifter movement. This bike is new to me (older bike, from 2009). Now, adjust high limit screw until shifting from low/high up front is smooth. Then, place rear derailleur in 6th gear (6th from large ring) and shift front derailleur to high position while turning cranks. F= Number of teeth on largest front chainring. lijoeq ywf bfo rzp xggxvlyv mabs vqxef zdaq kixtj qpld