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Questions tagged [derailleur]

Mechanism to move the chain from one sprocket to another.

29 questions with no upvoted or accepted answers
6 votes
1 answer
193 views

The bike derailer will automatically drop to the lowest gear in the rear whenever my cadence slows

I have a REI Coop CTY 2.2 bicycle. Whenever I am biking and my cadence slows down, the bicycle derailer automatically (I am not shifting) to the lowest gear on the rear derailer. Any suggestions on ...
Meg's user avatar
  • 61
5 votes
0 answers
164 views

Can't find derailleur hanger for an old Nakamura

I tried local parts shops and tried the internet and still can't find the right hanger, And I no longer have the old broken one. I can't even find the bike on the internet, The only photo I found was ...
MNNR's user avatar
  • 51
4 votes
0 answers
237 views

Sram AXS derailleur does not shift

Have you encountered a problem where a rear AXS derailleur stops shifting? Any suggestions? I bought a mint 2023 GX AXS derailleur on Marketplace, it worked for the first short test ride on a road but ...
molexi's user avatar
  • 141
3 votes
0 answers
69 views

How to properly adjust front derailleur height when it can sway significantly once the clamp bolt is loosened up?

I'm trying to adjust derailleurs myself, for the first time .) the model is DEORE XT following the how-to https://www.wikihow.com/Adjust-a-Shimano-Front-Derailleur the very first step - adjusting its ...
darkdiatel's user avatar
2 votes
1 answer
158 views

pedals only move bike at highest gear

Recently my bike will only move if I’m in the highest gear. I can pedal at lower gears but it will not move my bike forward at any reasonable speed and when I get up to even a very low speed the ...
Sarah's user avatar
  • 21
2 votes
0 answers
124 views

Gear up lever will not move

I just got a new bike and unfortunately fell off it on the first ride, now the lever to change gear for my derailleur Mezzu Microshift is stuck in the position it would be if you had upped a gear ...
user37577's user avatar
  • 121
2 votes
0 answers
416 views

Using 11-36t 9 speed derailleur with 11-40t 9 speed cassette

So I've got the shimano altus rd-m2000 and it says that it only supports 11-36t. However, I've seen people on forums say that it's possible with this derailleur. Even it I was wondering if with a ...
aechaechaech's user avatar
2 votes
0 answers
84 views

What's the type of polymer material used in friction bushings in Sram rear derailleurs clutches?

The friction bushing of an (older) Sram rear derailleur clutch is shown below. What type of polymer material are these made out of? I'm also interested to know what friction materials are used in the ...
Cedric Eveleigh's user avatar
1 vote
0 answers
58 views

Shifter only clicks in one direction

My bike shifters on both the front and rear derailleurs suddenly stopped wanting to shift down. They both shift up no problem and the cable looks fine but when I try to shift down on either of them ...
Mike's user avatar
  • 11
1 vote
0 answers
543 views

Shimano 105 r7000 front derailleur hard and clunky shifting, shifter harder to shift

A total newbie to DIY bike repair here, and my Shimano 105 r7000 FD is shifting really harshly after a wash. Washed it with dish soap plus water solution, however I did not give the FD any specific ...
justafred's user avatar
1 vote
0 answers
131 views

Cable rubs on mountain bike derailleur

the hole were the cable goes through does not have a guide. The cable rubs against the aluminum housing. What is suppose to go in there?
Paul's user avatar
  • 831
1 vote
0 answers
135 views

Rear Derailleur Noises

When I pedal on my bike there is a loud noise that increases as I go into easier gears on the cassette and in the easiest gear I can see the chain catching on the derailleur jockey wheels, why is this?...
Charlie's user avatar
  • 158
1 vote
0 answers
169 views

SRAM Yaw Front Derailleurs

Can anybody help me with any tips on fine-tuning the adjustments on this derailleur (Force 22)? The positioning as far as I can tell is good, I can stick a penny between the teeth of the big ring and ...
AnxiousCouch's user avatar
1 vote
0 answers
134 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 ...
Dale Jennings's user avatar
1 vote
0 answers
1k views

Bent shimano 12 speed slx m7100 rear derailleur. Cause?

Rear derailleur (mileage: 600 miles) simply bent during my ride (I didn't crash and didn't notice something hitting rear mech). Bend is significant. It seems to me that the derailleur cage is bent, ...
Michal's user avatar
  • 11

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