Rear derailleur tension problem

rear derailleur tension problem One of the most common problems you might face in the process of adjusting rear derailleur is that you experience skipping when you are riding under load or climbing a steep slope. Adjust B-tension. This will create slack in the shift cable. UnBolt Derailleur Adjusting a rear derailleur is a relatively easy step by step process that only requires a standard screwdriver. The rear derailer is the most fragile and exposed part of a bicycle, and they are always getting bonked. When you shift, they guide the chain to the correct gears. 1 - compatibility of 10s rear derailleur control levers chain cranset front derailleur ergopower power - shift 10s ergopower Why Your Bicycle Chains Fall Off From The Derailleur. Periodically check that there is no gap be-tween the dropout and the bracket, as this could cause problems with gear shifting performance. 1 - REAR DERAILLEUR CABLE AND HOUSINGS A 13 14 15 B COMPONENTS 6 ERGOPOWER - Rev A derailleur works through cable tension, and the highest gear is actually the point of lowest tension, meaning the derailleur is doing the least work and is thus easiest to adjust. The cage of a derailleur is the part that you see hanging out. The gear lever behaves as if it's in the biggest sprocket, but it's sitting in the smallest since I can't change gears. I've never seen a new Shimano rear derailleur that didn't work. Checked for any cable binding points 4. Groove Using the B-tension adjust bolt B B A B A A (A) (B) (C) Mount the chain on the smallest chainring and the largest sprocket, and turn the crank arm for shifting. This should help relieve any pressure on the b-tension screw, thereby making it easier to detach the rear Spring Tension . My chain is worn (I 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 your front derailleur. The chain started with 120 links. It seems as though the spring tension in the der has "run out" and can't pull it all the way down to the smallest position. Still unable to adjust for B-Tension as it does not engage. To tighten the cable, if you have an adjuster, start by screwing the inline adjuster all the way “in” so that you will have its full travel should you need it in the future. Start off by setting the second largest chain ring to the correct position. As the derailleur wears, it will develop play at all pivot points. 5. When the derailleur is farther away, this will slow things down. This is very bad news when it happens. Groove Using the B-tension adjust bolt B B A B A A (A) (B) (C) Mount the chain on the smallest chainring and the largest sprocket, and turn the crank arm for shifting. Is there a way to adjust the spring tension on these? If you're trying to perfect your rear shifting, but basic adjustments just aren't cutting it, we'll show you some of the possible sources of your problems, a I believe that you should increase tension of the rear derailleur cable by untightening the nut on the derailleur and pulling the cable with fair power while locking it back. Ever more frustrated I then: 3: (Over) tightened the rear derailleur cable at the hex bolt mount (thinking that the cable was too loose). Do this by setting cable tension. The rear derailleur indexing is adjusted by changing the inner wire tension. Our Verdict: Undoubtedly, one of the most affordable off-road rear derailleurs out Step #1 View the b screw on the back of the rear dérailleur ( at the green arrow ) Step #2 If you experience chainsuck issues in the biggest cog turn the b-screw clockwise to pull the rear dérailleur back. Rotating the screw clockwise will pull the derailleur downward. Mount the derailleur to the frame The RD-R8050 and RD-R9150 derailleurs are direct mount ready and come with a B2-link plate . One, they are too small for the motor drive chain. I got away with using lining up using the b tension guide they provide and then just setting it a few mm's closer since you're supposed to set it with a person on the bike. We put it through its paces on urban and hybrid bikes. That didn’t align the highest gear/rear derailleur either. However, these parts must be installed and calibrated properly in order to shift smoothly. Take out the housing coming from the rear derailleur from the frame stub holding it in. Without this, there would be a lot of issues, such as the chain falling off the crankset. 4. General. Friction along the shift cable prevents consistent movement of the derailleur as the cable is pulled and released at the shifter. Actually the problem began midway through a 50-mile ride in the mountains and has gradually gotten worse. First, you have to shift the front derailleur back and forth a few times. The rear indexing adjustment should only be done after the H-limit and L-limit screws are adjusted. the cable and insert it into the specific right hand rear sheath support (A - Fig. If you don't want to do that, the cable can be run under the entire bottom bracket, with a short length of cable housing to protect your paint job and hold grease. The humble rear derailleur (or ‘mech’ to its friends) is a remarkable beast. Chain Tensioner with Hanger: Mounts to your rear axle and rear-facing dropout to pull your axle back and tension your chain ; A derailleur hanger is integrated in our tensioner to put a derailleur on frames without one ; For use with rear-facing horizontal dropouts and 10mm axles Using a 5mm allen key, remove the rear derailleur. EA helps to simplify and stabilize the uneasy act of balancing rear derailleur hanger design, tight cog spacing, and exact cable tension. They don’t like going without periodical TLC, though, so if your shifting’s gone a bit awry here’s how to sort it. Have heard from a couple of people that the GX have some issues (apparently something to do with the spring?) and once changed to a XO derailleur, problems solved. 1. These usually come with guides for both front and rear dérailleur cables, so you may wind up with two unused fittings. We caught up with Jon Hayes, mechanic at independent bike shop, Ride What a derailleur cage does. This is usually done by rotating the key anticlockwise just to slacken the bolt that the derailleur is locked on to. With your limit screws and cable tension properly set your rear derailleur should be shifting quickly and accurately. (A) Groove Tightening torque 6 - 7 N·m NOTE Be sure that the cable is securely in the groove. the rear derailleur -- I checked the L and H screw settings, as well as the B-screw. On a derailleur bike a spring loaded arm holds the chain in tension. This tutorial will give you the step by step process for a Shimano rear derailleur adjustment. It does not spring back to remove the slack. Press your shifter once. Next toflat tires, the most common midride mechanical is related to poor shifting, and it usually starts at the rear derailleur. 2 3 1 mode A B C mode WARNING! Be very careful: as the rear derailleur does not move at a constant speed, when lever 2 is operated to move up to the 10th sprocket the rear derailleur may move beyond the 11th sprocket and touch the spokes. Two, they are not robust enough to handle the stress put on them by a motor driven chain. Adjust the B tension screw, located below the cable, to change the angle of the derailleur. Model:RD-TY21B rear derailleur compatible with 6/7 speed mountain bikes. 2. Pedal and shift one gear. To rectify this problem cable tension needs to be increased: On the back of a derailleur there is a barrel adjuster, a screw device located around the cable housing where it enters the derailleur. The old one was a short cage model for a 12-25 cassette. The cable system is a common place to find issues that will cause poor shifting. Adjustment of the rear derailleur is sometimes necessary to maintain fast, accurate, and reliable shifting across the cassette. Therefore this suggests that the cable tension is too tight. Still unable to adjust for B-Tension as it does not engage. Less inner wire tension tends to move the derailleur to the right. Derailleurs would make excellent tensioners if it were not for 3 things. While it works, if you do this enough times, you can fray your cables (bad) which means replacing them. Is there any way that the reprogramming of the rear derailleur has somehow affected the Before you mess with the derailleur, consider other potential sources of your poor shifting problem. Installation of the rear derailleur INSTALLATION Installation of the rear derailleur (A) (B) Install the rear derailleur. For beginners and amateur cyclists, the wrong way of shifting gears can lead to out-of-derailleur bike chains in the long term. To tighten the cable, if you have an adjuster, start by screwing the inline adjuster all the way “in” so that you will have its full travel should you need it in the future. The problem seems to stem from the DiRT cable routing they used on the ’10 X9 and X7 derailers, which has been changed for 2011. If the chain is not cleanly moving from the smallest to the largest chainring, then you have to increase the inner wire tension. All the bikes, regardless of BMX bikes or cruiser bikes, can face the same problem. The reasons for slipping bicycle chains off the derailleurs are numerous. Page 1 of 2 - GX Eagle Rear Derailleur Shifting Problems? - posted in Tech Q&A: Morning Id like to know if anyone else have also experienced shifting issues with the GX Eagle Rear Derailleur. This is a good position if you have a large cassette. Then we mounted it on a mountain bike to see how it fared on the trail, including technical sections. Sometimes it works fine but usually it just hangs when I try to down shift. You can do this because the shift cable should not be under tension. The inner wire tension will not stop the derailleur at its The cable tension adjuster defines how far up or down the derailleur moves. Removed 2 more and this is where we're at. You know you can adjust the tension on the clutch? Can't do that on SRAM derailleurs. Make sure that your derailleur sprockets are in the same plane with the chain rings at each and every gear. 3. Here is our detailed review. Now, make sure that the rear derailleur cable (the actual wire) is just slightly slack. The limit screws are tucked right underneath the AXS battery pack on the derailleur. wobbly one at top). Too little tension: most often the problem On a normal pull rear derailleur (which if you are reading this I am guessing you have); if you go to shift into a larger ring on the back and the derailleur is disobedient then you need to add tension to the cable. Dirt and grit can work their way inside the housing. If I just push on the der with my finger, then it will shift. If it’s under tension, turn the adjuster barrel on the rear shifter clockwise until the cable is no longer taut. It will still shift, just not as crisply. Make sure that your derailleur sprockets are in the same plane with the chain rings at each and every gear. Problem Solvers Chain Tensioner with Hanger. These screws are related to derailleur adjustment, however, once they're set, which we do when we assemble the bicycle, they do not change adjustment. 2 - compatibility of 11s rear derailleur (except for sr / r / ch / potenza 11™ of the current range) 2. Chain tension seem fine but derailleur looks really folded up and This is a common problem with rear derailleurs. To fix the problem, you will have to replace the hanger or use a derailleur hanger alignment tool to straighten it. I really believed that this 1978 Huret Eco rear derailleur was broken, after taking it off an old French bike. 12 B A 4. Installing them is relatively easy, you mount it to the frame, disable the clutch, set the limit screws and do micro-adjustment if necessary. Please check the mount type of the original part before ordering. I also cleaned and lubed the derailleur on the pivots and the pulleys. B-tension adjustment seems OK. And depending on where they were mounted, they would have alignment problems just like the toothed rollers. We have tested the Altus RD-M310 Rear Derailleur by Shimano in various ways. Begin by shifting your SRAM rear derailleur to the smallest cog (least amount of cable tension) and then undo the derailleur's cable anchor bolt in order to release all cable tension. Rear derailleurs guide the chain from gear to gear. Don't forget to lube the chain after all the adjustments are done and do a test ride. $23. So, it's almost never necessary to turn them. In most cases the reason you reach for the adjuster is because the rear derailleur starts hesitating when shifting onto larger cassette cogs (lower (easier) gears). Turn the adjuster anti-clockwise to increase cable tension and solve problems caused by cable stretch. Step 7: Other problems If your shifting is still wonky, there may be other Hi, I have just bought a custom built Azonic gravity frame downhill bike but there is a problem with the rear derailleur. FREE Shipping. The cable system is a common place to find issues that cause poor shifting. You should only do that when the chain is in the smallest cog on the cassette and the bolt for the cable is all screwed in. Shift the rear derailleur into the highest gear (the smallest rear cog). It's important to notice however, because once the derailleur is bent, bad things can happen such as shifting into the spokes, which may ruin the derailleur and might seriously damage the rear wheel and frame. See how a derailleur with lost spring tension can not function properly. For beginners and amateur cyclists, the wrong way of shifting gears can lead to out-of-derailleur bike chains in the long term. The correct cable tension. If I try to release tension via the gear lever, nothing happens either. 30. Now, make sure that the rear derailleur cable (the actual wire) is just slightly slack. We caught up with Jon Hayes, mechanic at independent bike shop, Ride Reconnect the inner cable to the rear derailleur. ” All of those factors will save you 2. Cable tension seems to be fine, and the cable moves freely through the guide on the bottom bracket. The rear derailleur indexing is adjusted by changing the inner wire tension. Figure 17 - Removing the connecting arm At the other and of the rear derailleur are another dust cap, snap ring, axle and spring as shown in Figure 17. Based on B-Tension issue, I replaced rear derailleur. So mechanical trigger shifter especially with activated clutch on the rear derailleur is not great for me, to abusive, especially with so strong spring tension, even with days or weeks of using hand cream and my skin is being normal, after several hours, my skin gets some wear, and pain, on not as long rides, but for the longer rides I get a The disadvantage is that on a bicycle without a rear derailleur but with vertical dropouts, the chain tension cannot be adjusted by moving the wheel forwards or backwards, and needs another means of chain-tensioning, by a derailleur, chain tensioner, or eccentric bottom bracket or rear hub. For the common rear derailleurs, increasing inner wire tension tends to move the rear derailleur more to the left, or toward the spokes. You can do this by twisting a barrel adjuster counter clockwise. The reason why, when you pedal backwards, the chain sits perfectly on the lower (tension) jockey wheel, is because it's under more tension than normal and it's joining that jockey wheel inside the rear derailleur (RD) cage and 'leaving' it to move forwards to the chainring. More Buying Choices $23. If you install the derailer per SRAM’s 6mm gap spec and size the New cassette, 11-46 (from 11-42) New derailleur (same as before) New chain. Note:The rear derailleur is direct mount,not hub bolt mount . Rotating the screw counterclockwise will pull the derailleur up toward the cassette. Now that the limits are set accurately, you can adjust the inner wire tension. • Apply a sheath terminal to the other end of the she-ath and secure the cable onto the rear derailleur (see the technical manual chapter on the rear derailleur). It will still work, but as the derailleur pushes on the chain from the inside, the shift takes place when the chain picks up the tooth on the next cog. 17). The cage can come in three different lengths – long, medium, and short. Shift the front derailleur up and down while pedaling with your hand. Whether you’re fixing a particular problem with your chain or simply giving the system a I did put the rear derailleur back to the original shift pattern, but that did not cure the problem. Derailleurs are the transmission of your bike. Then we mounted it on a mountain bike to see how it fared on the trail, including technical sections. The gear lever behaves as if it's in the biggest sprocket, but it's sitting in the smallest since I can't change gears. I’m thinking it could be one of two things: 1. 7. Then change gear to second smallest chain ring and observe, But after putting the wheel back in, I can't shift the rear derailleur anymore. The chain started with 120 links. Apr 29, 2019 27 63 Wanaka, New But after putting the wheel back in, I can't shift the rear derailleur anymore. This happened because the little pin circled in red here was bent, and was not engaging with the stop on the derailleur body (which should have prevented it from de-tensioning on removal). The Ultegra RD-RX805 and GRX RD-RX815 / RD-RX817 rear derailleurs are direct mount derailleurs that also feature a clutch mechanism (chain tensioner). The cable 2: Tried various tightening/loosening of the barrel adjuster. It was then that I saw the axial play in the G-pulley and made me (erroneously) think that IT might be the problem. Rear derailleurs are designed to maintain the appropriate amount of tension for seamless chain shifting. So I can't put more tension in the cable via the gear lever. If you’re having trouble, try lifting the body of the derailleur. If your rear derailleur has a clutch mechanism then you're probably looking for this installation guide: RD-RX805 / RX-RX815 / RX-RX817 installation guide. Removed 2 more and this is where we're at. Checked B-Tension to find that it never engages so I cannot adjust for it. 00 (2 new offers) SHIMANO RD-M2000 Rear Diagnose your problem. While keeping the rear derailleur in the Model:RD-TY21B rear derailleur compatible with 6/7 speed mountain bikes. Every time the bike hits a bump, small or Reconnect the inner cable to the rear derailleur. From there it's cake. So I can't put more tension in the cable via the gear lever. (A) Groove Tightening torque 6 - 7 N·m NOTE Be sure that the cable is securely in the groove. Removed all cable tension to ensure my rear housing loop wasn't limiting rear derailleur position and inhibiting b-Tension position. New cassette, 11-46 (from 11-42) New derailleur (same as before) New chain. The shift lever and front derailleur need to be fully returned to their starting positions in order to take all tension off the shift cable so you can remove any slack. The cage of a derailleur is the part that you see hanging out. Step back so you can see the chain and sprocket alignment, and then through the gears in both directions, first shifting up two and down one, and then down two and up one. Then turn the B-tension adjust However, I encountered a problem. Do this by setting cable tension. Regular rear derailleurs rely solely on the tension provided by the main pivot to keep the chain in place. It’s highly unlikely that this is the problem if the derailleur is new, but when the unit is disassembled for servicing, it’s possible to put it back together in the wrong order. Likely the issue is either a bent derailleur hanger or the low limit screw needs to be adjusted. Put the gear lever into top gear, turn the pedals and allow the chain to go onto the smallest cog on the cassette. One way around this problem is to buy a bolt-on guide clip. I've had cable tension problems for the front and rear and thought the same as you : that something was broken/not right so felt the need to loosen the cable bolt, pull the cable through, and re-tighten. However, once in awhile you might run into the opposite problem: hesitation shifting onto the smaller cogs (higher gears). It had no spring tension and it seemed lifeless, the jockey wheels were seized and it had basically given up doing its job. Still a small mismatch that caused a small amount of misalignment and noise. If the chain doesn't move to the next cog, you need to add tension to the cable. If it’s under tension, turn the adjuster barrel on the rear shifter clockwise until the cable is no longer taut. Adjust Limit Screws On The Derailleur (15:25) Adjusting the limit screws on the derailleur will keep your shifting quick and precise. Dirt and grit can work their way inside the housing. An Improperly Assembled Rear Derailleur. I then realised the problem was my rear derailleur (Shimano Ultegra 6700) which does not seem to be properly moving back to keep the chain taut when I shift into higher gears. Well, this happens when your drivetrain has worn out and it’s time to replace it. When the shifter is in the smallest cog position, there is a little slack in the cable, yet the rear derailleur is not fully against the adjuster screw. The purpose of the derailleur cage is to pick up slack in the chain and maintain tension. Start off by setting the second largest chain ring to the correct position. Rear Derailleur Index Adjustment. Thanks Essentially, it just slows down your shifting. For the common rear derailleurs, increasing inner wire tension tends to move the rear derailleur more to the left, or toward the spokes. Grab the cage at the lower pulley of a new derailleur while mounted to a The problem was indeed that the tension spring had come unravelled when I first removed the derailleur. New cable, set-up issues etc. Left control lever Right control lever 1 - ZERO SETTING of the rear derailleur Either add or remove tension to the B-Tension bolt to make sure that the upper pulley wheel sits perfectly into that window. Some problems can be repaired trailside while others require parts Shimano derailleurs are generally fit and forget. Our Verdict: Undoubtedly, one of the most affordable off-road rear derailleurs out SHIMANO GRX RD-RX810 Rear Derailleur Tension and Guide Pulley Set. My new derailleur has a long cage, since I wanted to install a 11-34 cassette for riding in the mountains this summer. (A) Fork end (B) Bracket Tightening torque 8 - 10 N·m NOTE Periodically check that there is no gap between the fork end and the bracket as shown in the illustration. Shift the rear derailleur into the highest gear (the smallest rear cog). Solution C: Adjusting the Barrel Most modern bicycles have fine-tuning devices called barrel adjusters built into their derailleur systems. In some cases, it will actually go into the spokes of the rear wheel while it is turning. The added cable tension will ensure that the derailleur is really in its outermost position and that the chain cannot be thrown. Less inner wire tension tends to move the derailleur to the right. While pedaling the bike, locate the cable leading to your rear derailleur and pull on it gently. The rear derailleur is connected to handle shifters with a cable that controls gear shifting. rear derailleur (Fig. This pivot was a previous cause of shifting problems, but behaviour in that case was much affected by changing c Just make sure you take your time with feeding the cable correctly to the tension bolt and also get the b tension screw correct. We all know that a rear derailleur is used to shift the chain between different sprockets/cogs of the cassette. Turn the adjuster anti-clockwise to increase cable tension and solve problems caused by cable stretch. 6. Once your cable is guided from your shifter to your rear derailleur properly, pull the cable snug, but not overly tight, and secure the cable tension screw on your derailleur. When downshifting (moving to the larger cogs, lowest gear) the shifting is moving the chain 2 cogs at a time. The shift lever and front derailleur need to be fully returned to their starting positions in order to take all tension off the shift cable so you can remove any slack. If there is a gap between these two parts, problems with gear When many people decide to adjust their rear derailleur, they mistakenly try to do it by turning the small screws on the back of the derailleur. Adjustment of the rear derailleur is sometimes necessary to maintain fast, accurate, and reliable shifting across the cassette. Stability: Durable aluminum alloy material and excellent shifting performance ensure safe and stable riding. 8. We put it through its paces on urban and hybrid bikes. I removed 4 complete links but chain was still a bit droopy on smallest cog. For the common rear derailleurs, increasing inner wire tension tends to move the rear derailleur more to the left, or toward the spokes. 30 $ 23. Please check the mount type of the original part before ordering. Checked B-Tension to find that it never engages so I cannot adjust for it. Repairing a vintage Huret rear derailleur, I have to admit, wasn’t a job I was sure of. Pulling the chain to tension the derailleur just enough that the chain is not doubling back and hitting the pulleys achieves the perfect small/small chain tension. Can it get to all 2-3 gears? Is there clicking, rubbing, or grinding? Make a note of any problem areas and remember them as you move through your adjustments. If the bike has only one position for the chain the distance between the cog-wheel connected to the pedals that pulls the chain, and the cog wheel on the rear wheel that the chain pulls must be exactly right. I bought the new set up as a bundle with the derailleur, cassette, and chain. 6. Friction along the shift cable prevents consistent movement of the derailleur as the cable is pulled and released at the shifter. The reasons for slipping bicycle chains off the derailleurs are numerous. 5. Unfortunately, the softness of derailleur hangers makes them a frequent source of problems. rear derailleur capacit (teeth) ax sprocet (teeth) in sprocet (teeth) chainring front difference (teeth) 30 30 30 2. Why Your Bicycle Chains Fall Off From The Derailleur. The chain runs around two jockey pulleys on the rear derailleur. Had rear hanger (steel frame integrated) checked and aligned twice. Watch this comparison between two Simplex derailleurs, one with lost spring tension. In this case, tighten the “A” screw to achieve the proper tension and alignment of the upper jockey roller under the sprockets. We have tested the Altus RD-M310 Rear Derailleur by Shimano in various ways. The main pivot, as you can see from the picture, has no tension so does not pull the chain at all and it is, therefore, way too slack. 4 watts when you’re pushing 250 watts, according to CeramicSpeed. If the rear shifter works properly when using the large chain ring but not the small chain ring, or vice-versa, then the rear derailleur hanger might be bent. With the chain still in the largest cog, adjust the B-tension screw (E) so the derailleur sits close to the cassette without touching or bouncing off when the chain is rotating. Stability: Durable aluminum alloy material and excellent shifting performance ensure safe and stable riding. All the bikes, regardless of BMX bikes or cruiser bikes, can face the same problem. When a rear derailer gets whacked, it bends inward, toward the spokes. It almost feels like the problem is in the tension spring in the rear derailleur. Thread starter Oldnomad52; Start date Jun 3, 2019; Forums. @Cycleops may be along too with his preferred RD adjustment video link. The rear indexing adjustment should only be done after the H-limit and L-limit screws are adjusted. By using two springs and axles, the rear derailleur is allowed to keep chain tension as it travels up and down the rear freehub from ring to ring. I don't know what's going on but I'd be looking at other things. Step #3 If you have problems shifting in the smallest cogs turn the b screw counter-clockwise to push the rear dérailleur in. Pedaling forward with your right hand, use your left hand to push the derailleur in (shift into the lower/inward gears). Jockey wheels are original (and the fitted the right way, i. For the common rear derailleurs, increasing inner wire tension tends to move the rear derailleur more to the left, or toward the spokes. 4. Here is our detailed review. First, try to wiggle the cassette, then the derailleur and hanger to make sure everything is tight. When you shift to a larger chainring or cog, the shifter cable pulls the rear derailleur forward, causing the pulleys to push the The rear derailleur will become worn with use and abuse. If any of these components are loose your bike will not shift properly, and you will not be able to make accurate adjustments. Then turn the B-tension adjust Rear derailleurs for the most part are relatively maintenance free except for lubing and cleaning regularly. When you think about what it’s trying to do it’s a wonder it works at all, let alone as well as it does. 5. If there is a cable adjuster on the gear All of this problems are caused because of bad tuned rear derailleur. I removed 4 complete links but chain was still a bit droopy on smallest cog. Note that Campanolo rear derailleurs have an “A-tension” screw instead of a “B” screw that adjusts the lower spring instead. To rectify this problem cable tension needs to be increased: On the back of a derailleur there is a barrel adjuster, a screw device located around the cable housing where it enters the derailleur. derailleur may change when the rear suspension moves, so determine the length of the outer casing at the point where this length is at its greatest. The lower the cage tension, the less friction the derailleur system will create. Chain tension seem fine but derailleur looks really folded up and This is a common problem with rear derailleurs. Based on B-Tension issue, I replaced rear derailleur. The purpose of the derailleur cage is to pick up slack in the chain and maintain tension. Note:The rear derailleur is direct mount,not hub bolt mount . Posted: Mar 8, 2014 at 7:04 Quote: I have a Shimano XT 9spd long cage Rear Derailleur that seems to have lost almost all rearward or reverse tension. Adjusting the rear derailleur. Step 1. Rear derailleur adjustment is dependent on just three things: Derailleur alignment –this is the derailleur's alignment relative to the frame and drive train. One minor fix you may have to perform on a regular basis is an adjustment for when the chain becomes loose or performance is affected. e. The rear derailleur indexing is adjusted by changing the inner wire tension. Figure 17 - Removing the connecting arm At the other and of the rear derailleur are another dust cap, snap ring, axle and spring as shown in Figure 17. This creates friction along the system, which will slow the shifting in both directions. The rear derailleur indexing is adjusted by changing the inner wire tension. This is caused by the gear cable having stretched a little. Fixed wheel bicycles cannot use any form of chain . Basically I have 2 problems: 1. Then I pulled the inner wire and cleaned and lubed it. Here, in Serbia, bike shops usualy charge you 500 rsd ( about 5,6 $ ), but problem isnt money ( well, 10 $ is average daily wage in Serbia , so you could say its overprized, but ) problem is that even you want to give them money, they arent fixing that problem for eternity If you do manage to crash or drop your bike and bend the derailleur, you might not notice. Place the bike on a repair stand or flip it over so it rests on the seat and handlebars. On my wife’s bike though, the rear derailleur (Suntour AR) is not tensioning the chain properly. This creates friction along the system, which will slow the shifting both directions. My understanding is that downshifting is caused by increasing the cable tension which pulls the derailleur inwards thus shifting the chain. 1). The bike is only 3 months old so I phoned the manufacturer (Planet X) and spoke to one of their mechanics. Also the top derailleur pivot was stripped, cleaned & re-greased a moderate while back. If the derailleur’s cage is rubbing against the cogs, the derailleur may be improperly assembled. When it’s in the gear with the largest sprockets (front and back), the chain is ok, but anywhere else, it hangs loose. By using two springs and axles, the rear derailleur is allowed to keep chain tension as it travels up and down the rear freehub from ring to ring. If I try to release tension via the gear lever, nothing happens either. Levo Rear derailleur problem. Over the past 2 rides I’ve noticed that my rear derailleur (SRAM X-9) is having problems shifting down. One thing that can cause this is someone overtightening a new shift cable during installation (or incorrect subsequent adjustment). The STI shifter seems to be working fine: at any rate, the ratchet pays out the right amount of cable with each click of the lever. If the derailleur hanger is deformed, it may cause rubbing issues. General EMTB Forum Oldnomad52 Member. Park Tool Rear Derailleur Guide. Often this adjustment is only necessary if you have swapped to a cassette with a larger cog (for example: 25t cassette swapped for a 27t cassette). The result: the easiest index shifting system to set up—and it stays that way. rear derailleur tension problem

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