Questions tagged [derailleur-rear]

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

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Tourney Shifter temporarily not shifting on the rear

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
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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
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38 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
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1 answer
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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
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51 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
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1 answer
114 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
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42 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
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1 answer
105 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
  • 1,051
3 votes
2 answers
252 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
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3 votes
2 answers
594 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
128 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
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4 votes
1 answer
291 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
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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
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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
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3 votes
2 answers
533 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
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4 votes
3 answers
842 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
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1 vote
1 answer
112 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
  • 11
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0 answers
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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
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1 vote
1 answer
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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
  • 1,432
3 votes
2 answers
538 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
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3 votes
2 answers
553 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
53 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
194 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
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1 vote
0 answers
31 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
234 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
235 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
178 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
209 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
  • 727
4 votes
1 answer
656 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
139 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
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4 votes
2 answers
167 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
34 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
358 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
290 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
  • 4,101
3 votes
2 answers
280 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
461 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
0 votes
0 answers
69 views

Shimano Dura-Ace M5 10-speed bar end shifters compatibility

I currently have Dura-Ace M5 10-speed bar end shifters on my triathlon bike. I want to add a larger cassette up to at least 30T. I will need a larger cage derailleur but I am not sure which one is ...
Bruce's user avatar
  • 1
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
  • 1,051
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 ...
Antonio's user avatar
  • 101
2 votes
2 answers
119 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 ...
Ferdia McKeogh's user avatar
5 votes
3 answers
929 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 ...
duhnlic's user avatar
  • 151
1 vote
1 answer
200 views

Pulley wheel and washers - Rear derailleur

I bought a 2nd hand read derailleur (Shimano M340) and now I've realized that pulleys wheel have not the metallic cover plates(washers) that Shimano derailleurs pulley wheels always have. What should ...
Daniel Perez's user avatar
7 votes
1 answer
875 views

The pulley is not close enough to the largest sprocket even when b-screw is all the way out

I have a new bike with Shimano Ultegra di2 12sp and 11-34 cassette. Following Shimano's installation instruction, with largest sprocket and small chain ring, I cannot move the upper pulley close ...
Ning Wang's user avatar
  • 239
3 votes
1 answer
209 views

How does the chain stabilizer perform its clutch function?

The chain stabilizer (blue in the sketch below; source) consists of two parts. The two parts are: an outer metal part (top right of the image below), and an inner part (bottom left of the image ...
Sam7919's user avatar
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20 votes
3 answers
6k views

What exactly is the "clutch" doing on a Shimano M8100 rear derailleur?

My new Shimano 12s XT 8100 rear derailleur has the switch with on and off positions. From that I found on the web, it is a "clutch" and I must turn it off when removing the wheel. I can ...
nightrider's user avatar
  • 7,412
3 votes
2 answers
258 views

Do I need a Goat Link on a Triban RC520?

I would like to build a 1x road bike with low gear ration for bike touring. I went across this article about mullet drivetrain and it looks like what I want. The Triban RC520 from Decathlon seems like ...
Puck's user avatar
  • 171
7 votes
3 answers
815 views

Improve my hill climbing gear ratio on my Cannondale CAAD8

I own a Cannondale CAAD8 and absolutely love it. However it's not the greatest hill climber and I am considering on getting a bigger cassette to improve my ride experience on hills The current bike ...
p50runner's user avatar
5 votes
3 answers
550 views

How to remove the pin on the lower end of the shift cable, to replace the derailleur

I need to replace the rear Shimano XT 7100 derailleur what broke in two at the base. It is attached by the single screw only but there is a metal pin fitted over the tip of the gear shifting cable. ...
nightrider's user avatar
  • 7,412
3 votes
4 answers
244 views

Can a 9 speed rear derailleur be used with a 7 speed freewheel and shifters?

I know this has been asked before but wanted to make sure in case things have changed over the years. I have a brand new Deore M592 Shadow 9 Speed rear derailleur and wanted to know if I can replace ...
Ben Sibley's user avatar
3 votes
3 answers
258 views

Rear derailleur looking abnormally contracted – What is wrong?

The derailleur is not extended. The cable tension seems ok. What could be the problem?
Erwann's user avatar
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