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Questions tagged [derailleur-rear]

Questions referring to the derailluer responsible for moving the chain along the cassette

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7 votes
2 answers
1k views

Does the rear derailleur hanger need lubrication

I recently had my bike into the shop since shifting was less than ideal. I had recently replaced the cable, yet every now and again, it wouldn't go into the next gear or would just jump 2 gears all ...
John Doe's user avatar
  • 353
3 votes
1 answer
205 views

What's wrong with my campy derailleur?

I'm trying to tune my campy chroma 10 speed but it wont shift to either the 2 highest gears or 2 lowest gears. Could it be that the drivetrain is bent? Is this due to a bad hanger?
Yay Brizsle's user avatar
1 vote
1 answer
39 views

Are there two types of RD-TY-300 - for standard and direct hangers?

I have a MTB with a mashed up Tourney RD-TY-300, due to a badly rusted chain. I might be able to bend it back into alignment, but seems unlikely, or would require a lot of work and finesse that I don'...
Greenonline's user avatar
4 votes
0 answers
98 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
4 votes
3 answers
230 views

Best derailleur compatible with 1.7 pull ratio?

I want to replace my Tourney 7spd with something else, but my cassette isn't compatible with an upgrade to anything else, so 7spd is what I have to stick with. I know I have to stay within the 1.7x ...
Knivier's user avatar
  • 43
8 votes
3 answers
1k views

Devastated- Ribble R872 Ultegra damage to rear dropout

Please see attached photo of damaged frame where rear wheel locks in. The rear derailleur hanger snapped clean off, so it did the job it is supposed to but there is damage to the frame. I’m being ...
John Gibbons's user avatar
3 votes
2 answers
152 views

Vintage derailleur identification

I have a vintage Shimano derailleur that I'm trying to identify, specifically to figure out which jockey wheel set is compatible as mine badly need replacing. The derailleur is marked "Shimano ...
Kyle's user avatar
  • 153
1 vote
0 answers
46 views

New tire tube and grinding noise?

I punctured my tire tube so i had to remove my back wheel out and replaced the tube, when reassembled, derailleurs started making grinding noises. I checked where the sound was coming and it was ...
user74879's user avatar
0 votes
2 answers
122 views

Granny gear not usable

I have Cyctrac EM5 with SHIMANO DEORE/M6100-12S derailleur. In others gears it's working fine. Here is a video of problem: https://www.youtube.com/shorts/V0Lr_IUTb7c
user7085152's user avatar
2 votes
0 answers
48 views

Something like chainsuck on RD lower pulley after new crankset install?

I just switched out a Shimano M5100 crankset for a SRAM GX Eagle crankset. I am using a KMC X11-EL chain. I cleaned the chain before installing it with the new crankset. My RD is a Shimano SLX 11-...
Brandon's user avatar
  • 51
0 votes
1 answer
63 views

Which rear derailleur can I put instead of Shimano Acera

My rear derailleur on Cube Aim Race 29" has broken on the holder. Except for this (and prior to the holder breakage) the derailleur has completely stopped working for some reason. It twists into ...
Vladimir Despotovic's user avatar
1 vote
0 answers
70 views

Not able to shift from a specific gear

I have a 9-speed rear derailleur and shifting from 1 to 9 isn’t a problem except when it is from 6 to 7, while downshifting has a bit of lag, upshifting takes forever and sometimes it doesn’t even ...
Rohith Nambiar's user avatar
5 votes
2 answers
983 views

Can I replace a 10 speed cassette with an 11 speed?

I currently have a focus road bike running on Ultegra group set. The rear wheel is currently 10SP. I’m looking at purchasing new wheels, and most of the second hand ones come with fitted 11SP. Can I ...
Kyle McDonald's user avatar
1 vote
3 answers
314 views

Shifter not working in cold weather

My commuter bike has a 7-speed Tourney groupset with thumb shifters. When commuting today, I arrived at the office and shifted down a few gears before parking the bike as usual. I noticed that the ...
DoNuT's user avatar
  • 4,481
1 vote
1 answer
84 views

Shimano rear derailleur compatibility with 13-32 cassette

I have a Freewheel cassette, 9-speed, 13/32T. Currently, I'm using a MicroNew 9-speed RD and a 9-speed shifter, but both of them aren't great, and I want to replace them. All I can find is the ...
MrGuGuZai's user avatar
0 votes
0 answers
135 views

Replacement pulleys for Shimano Deore XT RD-M739 SGS derailleur (8sp)

Wondering what replacement pulleys I should get for this type of derailleur. All details of the derailleur can be found here: https://velobase.com/ViewComponent.aspx?ID=4f90a749-6254-4a37-840d-...
Steven's user avatar
  • 183
1 vote
1 answer
101 views

How to eliminate flex in derailleur hanger plus Goat Link?

I have a Giant Trance. I have derailleur hanger with a Goat Link to accommodate a large cassette in the rear. Where can I get a custom made derailer hanger made to eliminate the flex with the goat ...
brian gary's user avatar
0 votes
0 answers
56 views

My derailleur doesn't go from gear 1 to gear 2 by itself but the rest does

The derailleur doesn't go from gear 1 to gear 2 by itself so I have to manually push it, it works perfectly fine shifting from 2 to 7 but when I try to change the gear to 8, it stays on 7
Dean Patsavouras's user avatar
0 votes
1 answer
259 views

I Have a Triban RC 100 (Small, Women's bike) I am upgrading the cransket to a Shimano 105, do I need to upgrade the entire transmission too?

I have a Triban RC 100 women's road bike and I bent the stock cransket in a crash so I am looking to upgrade to something better. I was thinking of upgrading the cransket to a Shimano Sora but would ...
einstein dhayal's user avatar
0 votes
0 answers
55 views

My bike won’t change out of first gear

NoI’ve tried changing the looseness of the H and L screws but my great problem remains the same. It won’t change out of first gear even when I manually put it into another gear. The back derailer is ...
Talia Gl's user avatar
0 votes
1 answer
144 views

Chain repeatedly slips on rear cogs to next higher gear...and sometimes back and forth. What to adjust?

EDIT: Just to be clear, everything has worked fine with the bike and the Kickr up until a few weeks ago (that is, for about six months the combo has worked fine). So something's gone a bit out of ...
Cerulean's user avatar
  • 1,061
3 votes
2 answers
732 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 ...
Edward's user avatar
  • 372
3 votes
2 answers
2k views

Can I upgrade my 11-28t cassette to 11-34t with Ultegra 6800 rear derailleur?

I think I am okay here but would be really good to triple check! My current cassette: Shimano 105 5800, 11-speed, 11-28t My front chain ring: 52-36t My rear/front derailleur: Shimano Ultegra 6800, 11-...
James O'dare's user avatar
4 votes
2 answers
189 views

rear derailleur stuck on first gear after changing rear tire

I am a cycling newbie. My bike has 18 speeds with two chainrings in front and nine in back. I just did my first rear tire replacement. Most of that went well, however when I took it out for a short ...
Stevie's user avatar
  • 41
4 votes
1 answer
310 views

Is it normal for rear derailleur tension to impact front derailleur tension?

I just received a bike from a bike shop. It has a GRX800 front derailleur (FD) and rear derailleur (RD). When taking a look at the derailleur setup to check if it is alright, I found something very ...
Daniel's user avatar
  • 143
0 votes
0 answers
239 views

Which currently available rear derailleur would work as a replacement for a Schwinn Boundary 29 Pro Shift?

I would like to change my rear derailleur. I have a Schwinn Boundary 29 inch, Pro Shift. I am not sure what year. Which currently available derailleur would mount up to the frame and operate correctly ...
Baldemar Dominguez's user avatar
0 votes
0 answers
16 views

Claude butler urban rear derailer upgrade

Hi looking to upgrade rear derailer. Currently has shimano tourney tx30 with 3 x 7 set. Can I fit a deore instead?
Toby's user avatar
  • 1
4 votes
2 answers
731 views

Compatible derailleur/hanger and going 1x

So the green Kona dew plus is my bike. It's an 8-speed with a 11-34 cassette. It came factory with an Alivio 9-speed derailleur. I need to upgrade the rear derailleur because I got hit by a taxi. My ...
Daniel's user avatar
  • 101
4 votes
3 answers
857 views

Is the mechanism that holds a bike to a specific gear in the lever that I use to change the gear or in the derailleur?

I have a big-box-bike 18 speed that I ride around the neighborhood for exercise. Recently it stopped staying in the rear gear I put it in -- I roll the gear selector where I want it, but as soon as I ...
Sidney's user avatar
  • 347
2 votes
1 answer
228 views

Upgrading Shimano Acera 8 speed Rear Derailleur to 8 speed Shimano XTR derailleur

Looking for some help here. I am upgrading Shimano Acera 8 speed rear derailleur to 8 speed Shimano XTR rear derailleur and it appears that because the old 8 speed XTR derailleur has a clip for the ...
XTR23's user avatar
  • 21
0 votes
0 answers
49 views

Chain slipping at specific chainring angle

1x11 road bike suddenly starts “slipping” gears without fully jumping gears. I noticed that, only when pedaling backwards in the bike stand, it happened in 180 degree intervals at a specific part of ...
Jake's user avatar
  • 1
1 vote
1 answer
106 views

Should the chain go inside or outside of the derailleur cage? [duplicate]

I see there is a lot of confusion about this. Should the chain be leaded through inside of the derailleur cage or outside? Example shown below is correct or not? https://preview.redd.it/et0gzv72mop71....
Ender's user avatar
  • 2,032
3 votes
2 answers
1k views

Rear derailleur not staying on largest gear

When I try to shift up to the largest gear, the derailleur moves up, and the chain moves on to the gear, but then comes back down. Upon closer inspection I found that when I hold the shifter, it ...
Alex L.'s user avatar
  • 33
3 votes
2 answers
693 views

What kind of rear derailleur is compatible with hanger on my bicycle

I have a Giant OCR (2004). I need to replace the rear derailleur (10 speed long cage - triple front chain ring). I've attached a picture of the hanger. What type of derailleur would work with this ...
Kevin Hoogerhyde's user avatar
2 votes
0 answers
57 views

clicking chain on 3rd gear only

Shimano DI2 11 speed XTR on my gravel bike. The 3rd from smallest gear on the cassette makes a clicking sound. Any other gear its fine. Cassette and chain are fairly new. Have reindexed, checked ...
wdossett's user avatar
0 votes
1 answer
239 views

Shimano 105 R5800 - Noise on largest cog?

Today, I had a weird problem with my road bike's rear derailleur. During an event (which was a 2-hour climb up an Alpine summit), I got a noise when riding in the smallest gear. It has a R5800 105 ...
DoNuT's user avatar
  • 4,481
1 vote
0 answers
37 views

Compatibility Shimano rear derailleur RD-6300

I have this Shimano 600ax. Due to my stupidness I broke the body of the rear derailleur endings its life. There are other rear derailleurs (RD-6300) on ebay for example but these are very expensive ...
Dr_P1nk_Eye5's user avatar
1 vote
1 answer
380 views

How to fix bicycle shifting down twice on a single click

I have a 1x Microshift Advent x system with Dropbars. I replaced the shift cable housing and cable and now it shifts perfectly, however it downshifts twice in the middle of the cassette. This did not ...
HristoM's user avatar
  • 11
2 votes
2 answers
273 views

Tight shifting and handlebar weird stiffness

I got my hybrid bike serviced 2 days back. Before the service, the handlebar used to turn freely, and the shifter was not stiff. I had given it because the day before something went wrong with the ...
Skull_Reaper's user avatar
2 votes
1 answer
246 views

Tiagra 4600 trigger shifters, 10-speed 105 RD-5701-GS derailleur and 11-32 cassette compatible?

My Cannondale Quick 1 Carbon has Tiagra 4600 trigger shifters, a 10-speed 105 RD-5701-SS derailleur and a 12-30 cassette. I would like to change to a 11-32 cassette, and understand that I would ...
Malcolm Ratcliffe's user avatar
4 votes
2 answers
347 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 ...
Mat's user avatar
  • 809
4 votes
1 answer
1k views

Could I use a Shimano GRX RX400 10-speed shifter with a Shimano Dura-Ace 7900 10-speed rear derailleur?

I am trying to be budget friendly and recycle parts for a new project.
Ivan's user avatar
  • 41
2 votes
1 answer
253 views

Should this bolt be tightened?

This bolt on the left side makes the derailleur move hardly or loosely on the derailleur hanger. I don't know how it should be set. Should I keep it tight or loose?
Ender's user avatar
  • 2,032
4 votes
2 answers
272 views

105 R7000 chain rubbing bigger sprocket when pedaling backwards

I am new to this so I wanted to know if this behavior is normal. When I pedal backwards and the chain is on the smallest sprocket I can see that the chain rubs for a second and then does a little jump....
notFake7's user avatar
1 vote
0 answers
38 views

Chain goes slack in gear 5-10 and very noisey hum

When I’m coasting downhill >35 kph and chain is in gears 5-10 and I hit a bump the chain goes slack, a very loud irritating hum/vibration sound is emitted from the rear wheel until either I pedal ...
Rob G's user avatar
  • 11
3 votes
1 answer
632 views

Is this a long or medium cage Shimano XT 10 RD-M786-(S)GS rear derailleur?

Update Thanks for the replies and comments. I finally managed to compare with a new RD-M786 derailleur, and it's a medium size. I think this is a Shimano XT 10 RD-M786 rear derailleur but is it a ...
AhseemHermanson's user avatar
5 votes
1 answer
387 views

What are good ways to remove initial cable slack when replacing rear derailleur shift cable housing?

I needed to change the cable and housing of a rear derailleur lately, and what I usually do to help with the initial cable slack is: Install the housing end caps on the newly cut housing and strike ...
olliebulle's user avatar
  • 4,119
3 votes
2 answers
536 views

Unmounting a stuck rear derailleur

I am trying to unmount my rear derailleur. However it seems to be seized and I am unsure how to proceed. See the pictures below. The current state of the derailleur is as follows: The screw inside ...
Finn Poppinga's user avatar
8 votes
3 answers
742 views

click, click, click... new jockey wheels break-in period?

I just replaced the jockey wheels on my 6800 ultegra rear derailleur. I noticed some clicking on a couple of the cogs on the the cassette. Upon further investigation, I discovered it was the new guide ...
alrob's user avatar
  • 183
8 votes
2 answers
2k views

What does this screw do (on my bicycle)?

I was trying to adjust the "H" and "L" screws on my rear derailleur to as to adjust the gears better to a Wahoo Kickr I just set up. However I accidentally gave a turn to another, ...
Cerulean's user avatar
  • 1,061

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