Questions tagged [derailleur]
Mechanism to move the chain from one sprocket to another.
727
questions
3
votes
2
answers
128
views
Replacing a hanger mount derailleur with a direct mount derailleur
I got a low-quality walmart bike for free in decent condition. I am trying to make it rideable. I have given up on the stock derailleur and bought a cheap shimano tourney direct mount derailleur to ...
- 161
2
votes
1
answer
78
views
Unable to backpedal - jockey wheels on Campagnolo derailleur
I have Campagnolo Athena rear derailleur on my road bike. Never gave me a hint of trouble. Always kept clean and lubed. Never ridden in the rain or in dirty conditions.
Yesterday I was not able to ...
- 51
14
votes
9
answers
4k
views
Beginner breaks rear derailleur, what might have gone wrong?
I broke the rear derailleur on a borrowed bike. I'm trying to understand why.
Until two months ago I knew nothing about bicycles. I bought a worn down cheap second hand bike. It took me way more time ...
7
votes
3
answers
312
views
Chain Links remain raised (i.e. sticky link)
I was trying to adjust my rear derailleur but I heard a noise. I found that when the chain went through the pulleys one link of the chain stayed up and made a noise.
How do I fix this?
5
votes
3
answers
91
views
Derailleur hanger repair interferes with highest gear
Bike was in the shop recently and they said they needed to repair the derailleur hanger threads, which is integrated with the frame. They said they would repair the threads with a helicoil.
When I ...
- 682
3
votes
3
answers
1k
views
9 speed chain on 8 speed derailers to reduce chain rub
I'm getting some chain rub on the hardest gear in the front and 2 hardest gears in the back where the chain hits the front derailer cage outer side. When I spin the pedal it seems like the chain is ...
- 1,639
1
vote
1
answer
100
views
Changing a derailleur
Can I change a deraiileur? Where is one suitable for this bike?
I commute about 40km round trip. Both my bikes were stolen last night and I recovered one dumped nearby with the derailleur broken and ...
- 1,650
10
votes
1
answer
1k
views
Why aren't derailleur hangers made into standard shapes?
That small piece of metal can render a bike unrideable, and sometimes a repacement is impossible to find.
There are standards for headsets, bottom brackets, brake mounting points, OLD and dropouts, ...
- 1,981
1
vote
0
answers
218
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 ...
- 11
2
votes
2
answers
705
views
Upgrading my shimano road groupset, compatibility issues
I'm in the process of upgrading my road bike's groupset, since it's quite old now.
I don't want to blow my budget so I wish to upgrade as little as I can with the most impact. I currently ride my road ...
- 59
8
votes
1
answer
362
views
Can any front shifter be used for 3 x 9?
I want to buy a new front shifter for my 3x9 speed MTB. The XTR M970 shifter is rare and expensive. Can I just use the front shifter from a 2/3 x 10 system? e.g. Shimano XTR M980 ? Are Shimano front ...
- 81
0
votes
0
answers
27
views
My ultegra front 3x derailleur adjustment screws are seized and the shift is unreliable into the small cog. Can I replace it with something similar?
I need to replace my 15-year old Ultegra triple front derailleur. I can't find the same model for sale online. What alternative options can I try please?
4
votes
2
answers
176
views
What do I need to change on the rear derailleur to match with the new cassette?
I'm going to the Alps soon and thought that it is a good idea to change my cassette from 11-30 to a 11-32 (with a fresh chain).
I started with replacing the chain, so I used like 3 different 'chain ...
- 727
2
votes
1
answer
45
views
Front derailleur clamp/hanger for Rivendell frame
I am building a bike with a Rivendell custom frameset. The seat tube size is 29.7mm. I am mounting a Dura-Ace FD-R9150 front derailleur that is braze-on.
I'm looking for an adapter clamp but the ...
1
vote
3
answers
148
views
1x9 wide range cassette
I am curious to find out if anyone has figured out a viable solution for a 1x9 wide range eg; 11 to 46 or 11 to 50 setup without using a derailleur hanger extension? I have a FS mtb and am not too ...
1
vote
2
answers
102
views
Shifting back slightly after shifting to high gear to reduce grinding noise
I tested a Cannondale Optimo 4 (entry level road bike with Claris) and I liked the bike but had 1 issue. When I shift to biggest wheel in front and small wheel in back there is a grinding/rubbing ...
- 1,639
5
votes
0
answers
129
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 ...
- 51
1
vote
1
answer
74
views
New shift cable damaged after clamping to shifter
I just replaced all the cables and housing on my bike and was annoyed to discover on close inspection that the front derailleur cable has sustained some damage from the cable clamp on the derailleur:
...
- 4,020
3
votes
1
answer
186
views
Shimano 400 Rear Derailleur Reassembly
I thought I was removing the rear derailleur so I could straighten the bent hangar but apparently I was disassembling it. Now I can't get the spring wound back around fully for reassembly.
Is there a ...
- 181
0
votes
1
answer
325
views
Derailleurs compatible with Shimano Claris ST 2400 Shifters
I have a 20-year-old Specialized Sequoia 24-speed road bike. When the groupset was last changed on it, the shop fitted a 3-cog chainset (50/39/30) and an 8-cog rear cassette (28/11), a Shimano Claris ...
- 121
10
votes
4
answers
3k
views
Is it okay for my rear derailleur to be as "compressed" as this when in the lowest gear on the bike?
Recently replaced the cables on this old road bike. When indexing the cable I notice how compressed this derailleur is and the two cogs are almost touching - it certainly doesn't look right to my ...
- 101
2
votes
2
answers
105
views
Using Burley Coho XC on road bike with Magic Speed Release axle
I have purchased a Coho XC trailer to use with my 2021 Orbea Avant H-60 (disc brake) bike.
I ordered a Burley Thru-Axle after following the Burley axle guide, but on attempting to install it (without ...
- 225
5
votes
3
answers
827
views
Can I use a vintage derailleur adapter claw on a modern derailleur
I am restomoding a vintage Hi-C branded Schwinn road bike. There is no derailleur hanger on the drop outs so I am in need of an adapter claw. Can I remove this claw from the old derailleur or is the ...
- 141
1
vote
1
answer
217
views
I need help with total capacity of rear derailleur
I am unsure how to calculate the total capacity for a 1x drivetrain, I have 46t up front and 11-32 10 speed cassette.
How can I determine which derailleur will work with this setup? E-mtb build.
I was ...
- 97
1
vote
2
answers
196
views
Campagnolo 2x11 Record with GRX derailleurs
I really don't like the Shimano 105 levers on my bike.
I would like to switch them in favour of Campagnolo 2x11 Record, and would like to know if anyone tried to fit them with GRX system:
Front ...
- 113
3
votes
2
answers
159
views
SRAM AXS XPLR compatability 1x10
I am considering buying an XPLR derailleur (and AXS shifters) for my gravel bike.
SRAM states the XPLR system is designed for a 1x12 drivetrain.
Would it also work with a 1x10 setup? Or even 1x11
Is ...
- 131
6
votes
2
answers
581
views
Is an Ultegra front derailleur compatible with Sora shifters?
I have a old trek road bike with 2X9 setup. I need to change the front derailleur. Can I use a Ultegra fd-r8000?
My shifters is Shimano Sora.
- 61
1
vote
1
answer
178
views
Rear derailleur catches and springs towards front of bike when in predominately in the smallest front chainring
I have a Planet X EC-130 carbon road bike with Ultegra group set. I have the stated problem above; it mainly happens while in the smallest chainring and does it at all speeds. It sometimes goes 20 ...
- 11
2
votes
4
answers
475
views
Original derailleur bolt no longer matches hanger
This post is continued from this one about a rear derailleur that looks awkwardly positioned relative to the frame. After further investigation it looks like the bolt of the derailleur and the hanger ...
- 250
0
votes
1
answer
320
views
2
votes
1
answer
364
views
Can I swap an SGS cage on a Shimano RD-M8100 having a GS cage?¹
It's been difficult to locate a new XTR M9100 or XT M8100 with the SGS (long) cage from the few reputable U.S. dealers I buy from where Shimano will honor their warranty. The GS cage versions are ...
- 9,522
0
votes
1
answer
150
views
Is the SRAM GX AXS a 1:1 replacement for a x7 derailleur?
The X7 is mated with a SRAM PG 1050 11-36 cassette. I would like to replace the derailleur without replacing the cassette.
3
votes
3
answers
239
views
Rear derailleur looking abnormally contracted – What is wrong?
The derailleur is not extended. The cable tension seems ok. What could be the problem?
- 250
3
votes
2
answers
346
views
Derailleur hanger bent
How can I bent it back
Because its one of those the hanger is a part of the derailleur
If I want to get a new one its the whole derailleur replaced with it
- 33
9
votes
2
answers
1k
views
Which limit screw is which?
I had to replace my front derailleur on my mtb. Now I just need to adjust it however the limit screws are not marked. Does anyone know if the L limit screw is closest to the frame? Or is that one the ...
- 817
5
votes
2
answers
873
views
Theoretically, about weird but very interesting 3x9 setup? Some knowledge about gearing would be great :)
Is it possible to have a 3x9 setup -
Triple 42T ( 42-32-24 )
x 9s ( 11-13-16-20-24-28-32-36-42T )?
The main question is, what kind of 9 speed derailleur is compatible and how long chain need to be for ...
- 51
4
votes
1
answer
168
views
Drawing/specification for direct mount rear derailleur hangers?
I am currently designing a custom direct mount rear mech hanger for my bike (as one doesn't currently exist). I've successfully designed and built a standard mount using PVD's Framebuilder Wiki. ...
- 101
6
votes
3
answers
297
views
Vertical Dropout Derailleur Hanger for a bike that did not come with gears?
I have a bike that did not come with gears. It is a rear hub driven ebike with a single speed. Eventually when the warranty runs out, I want to put gears in it and turn it to a mid drive. Now I know ...
- 63
1
vote
1
answer
93
views
Multiple gears shifted while not pedaling
It happened again, but much worse this time. Someone shifted the front derailleur from 2 to 1 and the rear derailleur from 5 to 9 without pedaling when I was in school. Does this do any significant ...
- 155
1
vote
1
answer
121
views
My daughters chain keeps falling off
The derailleur is not feeding the chain to the cassette properly it comes off the cog about half way round and gets spat off the cogs completely.
It looks like the derailleur is bent outwards which ...
- 11
8
votes
1
answer
1k
views
Chain is loose and rubs the upper part of the chain stay
I noticed that my bike's chain is rubbing the chain stay when I use the lower gears.
The bike is new; I'm wondering what the problem is.
- 217
0
votes
2
answers
103
views
Which electronic shifter to choose?
After a good old fashioned crash because of jumping rear gears I think I am ready to make the move to an electronic shifter/derailleur.
Currently I have a 1x10 setup with internal routing in the frame ...
- 131
6
votes
1
answer
503
views
Shifter cable broke in the shifter and now the end is stuck in the shifter
So The end of my rear derailleur shifter cable is stuck in the shifter. Is it even possible to get out? See the picture below. Shifting up and down doesn't really do anything to its position.
Edit: I ...
- 63
6
votes
2
answers
946
views
What can cause the chain to stay attached to chain-ring at bottom causing it to ride up and jam in the frame ("chainsuck")?
I'm looking for possible/likely causes of an issue with my front chain-rings on my bike. It's a 3x8 setup and the problem is worst on the smallest front chain-ring, and worse again when combining ...
- 215
6
votes
1
answer
826
views
Can't shift into lowest gear on a new road bike (pics)
I've followed the Park Tools Rear Derailleur adjustment video exactly, step by step, because my bike was jumping gears after I reinstalled the rear wheel after changing the tube.
The bike however won'...
- 163
4
votes
1
answer
1k
views
Rear derailleur compatibility for friction shifting
I have a mid-1980s road bike with downtube friction shifters. I'd like to install a freewheel with a larger cog (something like 32 or 34T), but my current rear derailleur won't accommodate that. So I'...
- 143
1
vote
1
answer
111
views
Why has my derailleur reposition itself so that its out of place?
I have a 2004 Trek Navigator I'm trying to fix up. Everything seemed fine until I switched gears and heard loud odd noise plus my pedaling got alot harder. Upon inspection I found my rear derailleur ...
- 817
2
votes
2
answers
289
views
New shifters for MTB to Gravel Bike (Deore M4120)
I have a MTB with DEORE RD-M4120 as the rear mech, and am currently running 10 speed, and am looking at converting this into a gravel bike. I want to put drop handlebars onto this new build, and was ...
- 21
6
votes
4
answers
1k
views
Advice needed to upgrade my groupset to make climbing easier
I have a Canyon Ultimate CF SL 8.0 Ultegra Di2 2020 with a rear 11/30 cassette and a 52/36 chain ring. It has a short cage rear derailleur (Ultegra Di2 R8050 SS short cage). I do long distance cycling ...
- 61
-1
votes
2
answers
308
views
Why there are no or few bicycles with coaster brake and external speed gears?
As I see, all bicycles sold with coaster brake never feature external speed gears with sprockets and derailleur. Bicycles that feature such a gear mechanism offer rim or disk brakes, operated by hand. ...
- 99