Questions tagged [derailleur-rear]

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

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8
votes
3answers
1k views

Upper pulley wheel suddenly totally off chain

Went for a bike ride today and thought the chain had slipped. Stopped and found the upper pulley wheel of the rear derailleur assembly was completely out of contact with the chain (please see photo)! ...
3
votes
2answers
88 views

One rear cog doesn't shift down

Recently, I have replaced a chain after noticing that the old one gained 0.75-1 percent of elongation. After that everything worked fine, i.e. shifting was consistent and smooth, drivetrain worked ...
0
votes
1answer
92 views

How to pick out a replacement rear derailleur

I have a Kent Nazz gravel bicycle. I am planning on making it a project bike to learn with. But I also really like the bike and how it feels. I got a Poseidon X also and I actually like the ride of ...
1
vote
1answer
75 views

9 speed Shimano Deore derailleur compatibility

Will a 9 speed Shimano Deore derailleur be compatible with my 13-32 tooth freewheel?
3
votes
2answers
201 views

Switching from a short cage to a medium cage derailleur

I ruined my short cage 10 speed shimano 105 derailleur, I have the chance to get another and I found a medium cage, will this work by just replacing the derialleurs or will I need to switch other ...
1
vote
1answer
57 views

is Shimano GRX ST-RX810-R 11 speed shifter compatible with Shimano XT M8000 Shadow+ Rear Derailleur - 11 Speed - Medium Cage GS

is grx ST-RX810-R rear shifter compatible with xt rear derailleur, Shimano XT M8000 Shadow+ Rear Derailleur - 11 Speed - Medium Cage GS
4
votes
3answers
882 views

Is there a reason why the range of acceptable indexing varies across gears?

I was having issues with indexing my Shimano 105 R7000 RD previously. Basically, even after aligning the rear derailleur hanger as accurately as possible and changing cables, I noticed that, the ...
3
votes
1answer
73 views

Can I use a 42 tooth max derailleur on my 13-32 tooth 9 speed freewheel?

I have a 13 to 32 tooth 9 speed freewheel. I wanted to upgrade my bike by getting a clutch derailleur on it but couldn't find much 9 speed derailleurs with a clutch that were under my budget of $60. I ...
0
votes
1answer
47 views

Can I replace a broken Alivio M410 8speed rear derailleur with Acera T3000 9speed?

Damage to a bike resulted in a broken hanger and a damaged derailleur. I can't get hold of a like-for-like replacement derailleur (Alivio M410). Have seen others state that a 9speed derailleur will ...
2
votes
3answers
109 views

Slight indexing issues on new 11 speed drivetrain -- normal?

I have a 20" folding bike that is about a month old and came with a Tiagra drivetrain. I subsequently switched it out to a 11 speed drivetrain (Shimano 105 R7000 with flatbar SL-RS700 shifter). ...
1
vote
3answers
245 views

Using a mountain bike rear derailleur with road bike shifters

I am in the market for a new rear derailleur and was interested to find out if it is possible to use a mtb derailleur with road bike shifters and cassette and chain? Would it work without fault? Does ...
0
votes
0answers
56 views

Derailleur broken?

I had a crash recently and now I have taken off my rear mech and seen that the guide pulley is spinning as usual but the tension pulley is getting stuck. There is a picture below of the broken pulley. ...
2
votes
1answer
248 views

Replacement rear mech hanger

I snapped my rear derailleur hanger yesterday on a ride and I wanted to know how might this have happedned and if so how can I prevent doing it in the future, I believe I was in the wrong gear going ...
0
votes
1answer
85 views

What issues will I have when combining a RD-4700-GS SHIMANO TIAGRA (Rear Derailleur,Medium Cage,10-spd) with a SHIMANO DEORE 10-Spd, 11-36T Cassette?

I have a RD-4700-GS SHIMANO TIAGRA (Rear Derailleur,Medium Cage,10-speed) and a CS-HG50-10 (SHIMANO DEORE, 10-Speed, 11-36T MTB Cassette Sprocket). However, the RD-4700-GS is compatible with a Low ...
6
votes
0answers
197 views

Why did Shimano change their rear derailleur design going from a torsion spring to a tension spring inside the parallelogram?

The older Shimano rear derailleurs (pre 7700) use a torsion spring inside the parallelogram. But with the release of the 7700 group they switched to a tension spring which they continued using ever ...
5
votes
1answer
127 views

Rear Mech Too Far Forward

I recently crashed my road bike in the city on some tram tracks, a terrible experience and don't recommend. I came off the bike and the bike itself landed on its right hand side and sustained damage ...
2
votes
1answer
67 views

SRAM NX Derailleur wheels hitting cable guide

The picture describes this issue better than I can. What is happening is that in the highest gear (i.e., in the smallest cog) the derailleur folds up as there is more chain to take up. However the ...
1
vote
2answers
98 views

Issues with new rear derailleur

Recently decided to replace the rear derailleur on my 2020 Kona Honzo. I bought a 12 speed Shimano Deore M6100 SGS. Also got a new shifter to replace the stock Sram one. Been trying to set it up for ...
3
votes
3answers
347 views

Which replacement derailleur for a 1975-1985 Schwinn Le Tour?

I have an old Schwinn Le Tour bike from around the 1975-1985 range. The rear derailleur broke and no longer holds any tension, so I need to find a replacement that will work. The current one is an &...
2
votes
5answers
316 views

Shimano Deore XT 9-speed rear derailleur with 9-speed 11-46T cassette?

I have an early 2000's bike with a 3x9 drivetrain. The front is a 22-34-44. The rear derailleur is a Shimano Deore XT RD-M750 and the cassette is a SRAM PowerGlide II 11-34T. I'd like to change to a ...
3
votes
1answer
110 views

Rear derailleur body rubs against chain when in highest gear

I have a Vitus bicycle with a Claris groupset. When I put the bike in the highest gear, the chain starts to touch a part of rear derailleur. I am still understanding how to fix my bike on my own. So ...
-3
votes
1answer
67 views

How to adjust rear derailleur indexing in a mix-and-match drivetrain in the easiest manner?

I have a touring bike where the drivetrain has been built not according to Shimano's instructions. For example, the shift lever is SL-BS64-8 Ultegra 8-speed bar end shifter that according to Shimano's ...
1
vote
1answer
69 views

Has anyone set up an 11sp ZTTO 11-52 cassette with an 11sp XT SGS and 11sp XT shifter?

I had 1x10 setup with a 10sp XTR shifter, 10sp Sunrace cassette (11-46) and an 11sp XT SGS derailleur and it worked very well (with the limit screw on the mech adjusted). The crank is a 32t RaceFace ...
0
votes
2answers
41 views

Rear derailleur won't go to smallest cog (road bike, MICROshift R8)

I checked, When the shifters are such that the chain should be on the smallest cog, the cable still has a slack, which I understand then it means is not a cable adjustment thing, If a very gently ...
1
vote
1answer
71 views

Problems upshifting with 105 5700 derailleur w/ Roadlink

I found a similar question here but no practical answers, wondering if anyone has encountered anything like this. I have a 105 5700 long cage rear derailleur with Roadlink extender installed and an 11-...
-2
votes
1answer
87 views

Why doesn't the cassette rotate when I backpedal?

I have an old bicycle where backpedaling causes the cassette to not rotate. Instead, the cassette stays still and the rear derailleur bends, providing new chain to go around the backpedaled chainring. ...
2
votes
3answers
143 views

Disassembly of Shimano Acera RD-M3000

I want to disassemble my Rear Derailleur 9-speed -> https://bike.shimano.com/en-EU/product/component/acera-m3000/RD-M3000.html Here is a video of instructions for disassembling a general rear ...
1
vote
2answers
273 views

Converting a derailleur to internal gear hub

I use my bike for commuting and trips around the countryside (about 400-500km per trip). I'm tired of changing the chain and gears (when I overdrive the chain's lifetime - my bad, I know) as often as ...
1
vote
2answers
225 views

Impossible to properly adjust rear derailleur indexing

I can't adjust the rear derailleur to shift properly. Sometimes it hesitates to downshift from 1st to 2nd and when it shifts to 2nd you can hear a faint clanking sound, like the chain is trying to ...
10
votes
2answers
2k views

Chain popped out of derailleur and wrapped around itself - how? why?

During my ride yesterday, I've hit a really weird mechanical and would love to understand. So here's the situation - I'm riding along, start on a hill, stand up and push some power, suddenly hear ...
1
vote
2answers
76 views

RD-5700 impossible indexing, hard cable pull (fresh setup)

I have replaced the cable and housing on a road bike with ST-5700 and RD-5700. The cable is slick stainless. If I activate the shift lever when holding the cable where it exits the first housing ...
1
vote
1answer
100 views

Cannot remove rear wheel -- axis on the right side is stuck

My question could be a follow-up of this question. This is what happened: I took out the rear wheel to make sure I would be able to do so in case of a puncture with the tools I was going to take for ...
1
vote
1answer
127 views

Will a shimano acera rear derailleur work with a shimano altus cassete?

Got sick of breaking rear axles. Im going to convert to a freehub. Currently i have a shimano acera 9 speed rear derailleur. I found a shimano altus cassete which has a huge 36 tooth sprocket which is ...
4
votes
1answer
265 views

Shimano RD M5120 and 10 / 11 speed compatibility

I thought the shimano mtb 10 speed is completely separate system and isnt compatible with anything else. However now there is a 10/11 speed RD - the RD-M5120 SGS. I was wondering how does this work. ...
7
votes
2answers
825 views

Rear derailleur moves forward when pedalling stops

Can you please help me to resolve the issue I am having? When I stop pedaling rear derailleur moves forward by inertia. This happen almost every time i stop pedaling and start coasting. I have a video ...
3
votes
1answer
494 views

Rear cassette Identification

Can anyone identify this type of hub? I need to replace the cassette, but I cant find anything that matches the cassette or hub. Its from a Schwinn Traverse 26". Thanks
1
vote
1answer
129 views

Can I mix shifter (deore m4100 10 speed) with my Rear Derailleur (deore m6000)?

Can I use deore m4100 10speed shifter with my RD deore m6000 10speed RD?
0
votes
1answer
165 views

6 speed derailleur works for 7 speed cog?

I am confused with description it say 6 speed, but below mention 7 speed as well. Will this derailleur work on 7 speed freewheel?
4
votes
3answers
966 views

45 day old SRAM rear derailleurs jumps gears

have a 1x12 SRAM NX drivetrain on a fairly new full suspension MTB. Been feeling great but yesterday it began skipping a gear when I shift. That is, if I start in 1 and click 4 times I wind up in 6th ...
3
votes
2answers
235 views

What kind of Rear derailleur do i have and what RD should I buy as a replacement?

I have an old mountain bike (21 speed) and I'm not sure what kind of rear derailleur i have. So far the performance is still okay but I was planning to replace it with my spare RD (SunRun Index) but ...
2
votes
3answers
99 views

Why would 6 stops on a Shimano shifter travel 7 cogs with a Shimano derailleur?

I'm replacing the rear shifter on my old Kona mountain bike from the late '90's. It has an 8-speed rear cassette with a Deore XT derailleur. I got a basic ST-EF500 8-speed Shimano shifter/brake ...
4
votes
2answers
781 views

How can rear derailleur work the opposite way it's supposed to?

I took a look at my friend's city bike's gears, as his rear gear shift levers felt almost completely "limp". Other (cleanliness and wear) issues aside, one thing that struck me as odd was ...
1
vote
1answer
60 views

Does bike geometry or wheel affect maximum cog size?

I got a used Cannondale Super X 105 during the winter and when I was getting it ready for the summer, I couldn't index the rear derailleur properly. It wouldn't shift to the largest cog and shifting ...
1
vote
2answers
67 views

Campagnolo Veloce compatibility - small rear derailleur with larger (29 or larger) cassette?

I recently bought myself a second-hand Condor Fratello. It is fitted with Campy Veloce (mix) groupset, currently with a 12-25 cassette. I'm coming from riding a 105 (11-32 cassette) for years, and ...
1
vote
1answer
56 views

Rear derailleur malfunctions

Around 1-2 weeks ago I sent my bicycle to my dealer because my cassette wasn't moving properly when I examined it by turning my bike upside down and my shifter shifted 2 times instead of 1 and ...
5
votes
2answers
245 views

Consequences of using smaller replacement pulley/jockey wheels in the rear derailleur

I have a new rear derailleur (Microshift Advent X) which uses somewhat oversized cog wheels with 12 and 14 teeth. I am known to wear these wheels during the winter season, so I am already planning for ...
0
votes
2answers
87 views

RD + cassette compatability

I have a Shimano 11-42T 10s cassette and Shimano XT M786 SGS Deore RD, can I make these work together by using goatlink or am I wasting my time?
5
votes
1answer
158 views

Shifter cable cut deep groove into the rear derailleur casing

I have an old Shimano RD-M760 DEORE XT Rear Derailleur, where shifter cable cut a deep groove into the guiding steel tube. Here is a picture: Is that tube replaceable? I think that groove is a ...
1
vote
1answer
38 views

Still skipping cogs when shifting after indexing and replacing shifter

I have been having problems with cogs being skipped when shifting up or down. Heavy pedaling will cause shifting sometimes. To fix this I tried resting the high and low limit screw and reindexing the ...
1
vote
1answer
150 views

Able to shift to final gear on bike, but not on smart trainer

I own a Trek Crossrip LTD 2016 edition bike with a SRAM 11-32 cassete in the back. I also recently purchased a wahoo kickr core to go along with the bike. When the bike has the wheel in and not ...

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