Questions tagged [derailleur]

Mechanism to move the chain from one sprocket to another.

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1answer
265 views

how to adjust the derailer - apart from the L/H limiting screws

Pardon my newb terminology. My bike's chain will not stay on the H gear (the big ring) The front derailleur will not allow it. I have loosened the limiter screw out to it's maximum and, still, no ...
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2answers
72 views

8 speed flat bar set up with Dura Ace RD-7700 or new Claris RD-2400

I'm buying a new drivetrain (cranks, cassette, chain) for my flatbar commuter that was mostly built of parts. I currently have a Dura Ace 7700 short cage derailleur on it, I got it from a friend a ...
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1answer
62 views

Chain catching after derailleur change

I am trying to figure out why my chain is catching with each revolution. You can see it in this short video [
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1answer
44 views

New bike rear derailleur not working correctly

I got this new bike over a week ago, and I was trying to fix the bike's derailing system and I can't seem to get it fixed. I tried watching a ton of videos online on how to adjust your derailleurs ...
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1answer
188 views

Chain crunching after degrease and lubrication

I did the usual degrease and lubrication on my mountain bike today but when I tried to ride the bike later on I heard pretty bad crunching sounds. The sound is definitely coming from somewhere around ...
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1answer
36 views

Shifter isn't working, cable doesn't react

When I pull the shifter for my front dérailleur the cable doesn't react. Even with tension on the cable. Now I made the cable loose. Also my barrel adjuster is disconnected, maybe the problem is ...
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1answer
56 views

Maintenance as my Derailleur are squeaking due to the everyday use and carelessness shown while changing gears while the cycle is static

What extra steps should I take to extend the life of the Derailleur gears on my Btwin Rockrider 340 besides oiling them ?
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1answer
147 views

I can't shift gears

My friend gave me his bike because it was too small for him, I was new to biking so I didn't notice till now that T can't switch gears. My front derailleur is on middle gear out of 3 and the rear on ...
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1answer
60 views

Adjustment necessary for stationary trainer

I am looking at purchasing a stationary trainer that will be shared with my wife and would prefer to do a wheel off trainer. Both of our bikes have a 11-28T cassette. So, theoretically, if the ...
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1answer
170 views

Is there a front derailer clamp diameter that is near 29.6 or 29.7mm?

I have a 1966 Schwinn Super Sport that I bought without a front derailer. The seat tube clamp diameter (i.e., the diameter measured out outside the seat tube, where a derailer would go) is ~29.6mm. ...
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1answer
206 views

Swapping out my front and rear derailleurs

I have been having trouble adjusting my gears correctly, so that they stop making noise and grinding in one spot or another. Every time I set the high, the low goes and then fiddling with the cable ...
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1answer
1k views

Removing the return spring of a rear derailleur [duplicate]

I am trying to turn my standard shifting bicycle into an automatic shifter using a motor to increase and decrease the tension in the shifter cable. The problem is that a lot of torque is required to ...
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2answers
67 views

mtb deraileur for 1998 s-works (8 speed)

I recently installed a Sunrace R90. The chain jumps in the middle gears. This may hurt my sprockets. I wonder if it is the shifter being worn that causes the jumping back and forth, for example from ...
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1answer
290 views

Problem with changing to high gear on the front derailleur on my new Bianchi Spillo Rubino Altus Rigid

It's a 24 speed bike with 3 gears on front (Cranks PROWHEEL 48/38/28T) and 8 on the rear. I rode it today and when I was moving the front gear to 3 to move the chain to the large ring I have to press ...
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1answer
410 views

Is this a short cage or long cage rear derailleur? [duplicate]

Is there an easy, objective way to tell?
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1answer
941 views

Replaced faulty Shimano twist shifter but front derailleur still won't catch 3rd

I have one of the ubiquitous Wal-Mart-sourced Chinese Kent bikes, badged as a "GMC Denali." It came with the Shimano RS41 3x7 twist shifters. The front shifter got to where it would not physically ...
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1answer
3k views

Slow switching up higher gears

I have a fairly new MTB and I'm currently trying to tune the gears. Currently I can change down gears pretty smoothly I.e. 6 > 5 > 4 etc but going up the gears is slow for the chain to switch cogs. ...
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1answer
982 views

7 speed front Derailleur on 9 speed crankset

I have 9 speed crankset (44-32-22 FC M542), and matching RapidFire 9x3 speed shifters (FL M590). Can I use 7 speed front derailleur FD M550 in that combination?
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1answer
2k views

Change my Shimano SIS rear derailleur of 7 speeds to a better one?

I recently broke my rear derailleur of my road bike it was a Shimano SIS 7 speeds, so I am thinking if I can get a better one like a sram or deore or I don't know. Thank you for your help.
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0answers
17 views

Broken Rear mech inner plate

My chain got caught in the guide plate and broke the encircled part of the rear mech (See photo) I'm using Shimano GRX 810 Rear derailleur. There are no observable misalignment. Question, is it safe ...
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0answers
55 views

Cassette noise in gears 1,2 and 3 on newer bike

I was out riding when I broke my chain (too high of a gear and too steep of a gradient). Got chain replaced and now my cassette gear 1 (easiest gear) takes more power to pedal than gear 2 and when I ...
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0answers
33 views

Chain length with new derailleur

I bought a 8spd chain and am putting it on a 7spd bikes. I thought I could use either a seven speed or eight speed chain. But it looks like the chain is way too long should I take out some links if ...
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0answers
42 views

My shifter shifts only one gear up and down

I just was on a ride and all of a sudden I could only shift one gear up and down (in this case it was the 10th and 11th respectively the 21th and 22th). If I try to move the shifter further up (so up ...
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1answer
116 views

Front and rear derailleur compatible?

I'm struggling and need help! My front derailleur which is 3x9 speed got damaged. Shimano Acera 9-speed, 34.9mm clamp, low-mount, top-swing, dual-pull but I'm thinking to upgrade it with a Shimano ...
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0answers
273 views

Shimano 9 Speed Cassette with Microshift Advent 9 Speed Road Shifter

I fancy setting up my old but amazing Cannondale F1000 with a dropbar and corresponding road shifters.The only affordable system I could find for that is the Microshift Advent 9 group. I'm happy with ...
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0answers
59 views

Gear change sticking only on specific changes - cable issue? [duplicate]

I'm riding a hybrid with 48/36/26 chain ring and 9 speed 11-32 cassette. When I change up OR down at a specific point the shift is slow and doesn't always engage. On the 48 this is between the 21 ...
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0answers
180 views

How do I find a compatible replacement for my rear derailleur?

I need to replace rear derailleur that was broken in an accident. The derailleur is Suntour with lettering stamped on inside - Maeda Ind. VIA HB. How do I find a compatible replacement?
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1answer
83 views

The spring in my front dérailleur is jammed

My front derailleur is jammed by dirt (grease + fine dust), because of this the gear doesn't shift perfectly and chain is thrown off the cog. The spring is a bit unreachable because the derailleur arm ...
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0answers
43 views

How often should I lube with Pedros Ice Wax? [duplicate]

I'm a usa cycling road racer. I just got a recommended lube Pedros Ice Wax. I ride about 100 miles a week. How often should I lube my chain with it and how often should I clean it?
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101 views

Is this FD compatible with this crankset: 2 teeth too litle

I am a proud owner of this guy. The crankset is SRAM S1200, 36/22 and the FD is SRAM X7, direct mount. However, the cage on the FD broke, and I ordered this item in a hurry. 1) Dyna-Sys 10-speed ...
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1answer
2k views

What are the shimano rear derailleur families?

What are the rear derailleur families, offered by Shimano? I need to replace a Shimano Acera derailleur and am trying to decide on a replacement part.
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1answer
273 views

It takes several clicks of the shifter to go from smallest cog to next biggest cog, and I get hit the four biggest cogs

When I try to shift from the smallest cog to the next biggest one, I have to shift three times before it moves. Click one and I see the cable tightening. Click two and nothing, and click three and ...
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1answer
548 views

ACERA VS STX RC

Hi everyone i have two rear derailleur barely used one Shimano Acera and one Shimano STX who has the best performace ? The main terrain for my bicycle will be off road downhill . I also have the front ...
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1answer
330 views

Chain fell out of rear derailleur when wheel off.

I took my rear wheel off to fix a flat and hung the bike up by its front wheel to store. when I returned to put the tire back on the chain had slipped totally out of the rear derailleur, caged jockey ...
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2answers
150 views

Gear slipping in gear 24

I use my bike everyday to commute and recently I've noticed that when in gear 24 my bike seems to slip from time to time as though the chain has "lost the gear" and then finds it again. I haven't ...
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2answers
289 views

the derailer is touching chain and it won't let me go past 14 speed supposed to go 21 speeds

The derailer on my 21-speed bike looks like it's bent. It won't let the chain go onto the 3rd ring of the front derailer so, no I can't shift past the 14th speed. If I try it makes a loud sound, like ...
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1answer
301 views

rear derailer broken [closed]

what model and number of derailer should I reorder for a replacement? Thanks, Dave

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