Questions tagged [derailleur-rear]

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

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compatibility table for shifter and derailleurs

I need a tables of compatibilities in order to find a compatible rear derailleur. And more specifically my need is for a short cage for a 20" wheel, freewheel of 7 speed and 34T max sprucket, and ...
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3 votes
1 answer
61 views

Recommendation for rear derailleur replacement for a hybrid bike

I recently broke my rear Derailleur in my Super Sport 700c SCHWINN S35408M10DSG-LG 7-speed hybrid bike. I tried the Shimano Altus MTB rear Derailleur but I don't like it as much, it feels a bit harder ...
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7 votes
1 answer
450 views

What is this metal cage covering the rear derailleur?

On my MTB: This cage like thing covering the rear derailleur was loose and was making a lot of noise when I was riding. I removed it temporarily and it seems fine to do so. Am I correct? What is the ...
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2 votes
3 answers
266 views

HELP with derailleur upgrade question

I just bought this Aventon Level ebike https://electricbikereport.com/aventon-level-review/ I was wanting to upgrade the derailleur, but I'm not sure which one to get. I don't want the entry level/...
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  • 21
3 votes
1 answer
44 views

SRAM X01 derailleur very slow to shift into two smallest cogs

I recently changed bikes and have my first SRAM derailleur. I'm relatively new to bikes (couple of years) but mechanically handy, and had no issues adjusting the Shimano XT derailleur on my last bike....
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  • 31
3 votes
1 answer
186 views

How to get Rear derailleur aligned and in correct position?

I have a shimano altus rear derailleur that won't go into biggest cog for gear 1 - it is two out so in the gear 3 cog. Would it be the limit screws needing adjustment or other? I have tried adjusting ...
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4 votes
1 answer
1k views

New bike is making rattling noise

Brand new specialized rockhopper 2022 is making rattling noise. Sample: Is this normal or could it be a manufacturing defect?
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  • 51
4 votes
2 answers
79 views

Can a Shimano 7 spd rear derailleur work with a Campy Athena down tube shifter?

Late 1980s vintage Italian steel bike with Campy Athena mech (7 spd rear derailleur). Need to replace rear derailleur (because of weak spring not taking up chain slack in small ring). My thinking is ...
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6 votes
3 answers
600 views

Servicing Shimano Centeron Jockey Wheels

I'm servicing my rear derailleur jockey wheels (pulley wheels) for the first time. They have about 20,000km on them. The derailleur is a Shimano Deore LX, and the first jockey wheel I've taken apart ...
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  • 2,577
8 votes
2 answers
180 views

What does the cable sheathing on internally routed cables do?

Last night it became clear that a friend's rear derailleur cable was failing, and I had a spare, so we thought we'd fit it - an easy job after all. Unfortunately not - it's a Cannondale Synapse with ...
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1 vote
1 answer
115 views

Can this combination work? SHIMANO RD M5120 with a M6000 drivetrain?

I definitely dislike the new proposals made by SHIMANO, but I have found that RD M5120 can be used in 10 or 11 speeds, it would only depend on changing the chain. Well, my doubt arises due to the fact ...
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1 vote
0 answers
74 views

Chain creaks under pressure

Just adjusted my back derailleur and now the chain makes a loud creaking noise while under pressure. When on a repair stand the shifting is perfect but while biking it’s horrible and the sound & ...
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1 vote
1 answer
100 views

Chain pops up while backpedaling in highest gear

Backpedaling on highest gear (11t) causes chain to pop up/out off at the front top part of the smallest cog. The bike and all components are very new and stock. This is a 1-by Shimano GRX Drivetrain. ...
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5 votes
2 answers
745 views

Removing and re-using a Shimano Tourney deraileur hanger - vintage road bike

I've acquired a Shimano 600 derailleur (see last photo) that's going to replace a Shimano Tourney derailleur (photos 1-3). I don't have the hanger for the Shimano 600 so I was thinking of removing ...
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  • 115
3 votes
1 answer
66 views

Direct mount derailleur movement when tightening thru axle

I've a direct mount rear derailleur and when I tighten the thru-axle the rear derailleur moves inwards towards the spokes, around 5mm. I'm getting recurring problems with gearing (I frequently take ...
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4 votes
3 answers
650 views

Can you use a shimano Tourney Rear derailer with a 1 x 11 (11- 52 ish) sprocket?

I'm trying to upgrade, but the Shimano Deore is too expensive... The problem with the other brands is that their rear derailleurs does not have good tension... so can I use a Shimano Tourney in a 1 x ...
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  • 41
0 votes
1 answer
122 views

Vibration feel on pedals

For a while, I am having a vibration feeling (and actually it vibrates) through my feet from chain. It is not because of front derailleur, I have just aligned them. There are no problems with rear ...
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3 votes
2 answers
562 views

How much can you exceed/abuse rear derailleur limits?

Gravel is my current bike, Sora levers, rest is MTB -- 3x9 with front 20 (not a typo) / 32 / 44. And I am thinking about changing rear to 10-speed, using cassette 12-32. Because of the positive ...
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  • 1,510
13 votes
6 answers
2k views

Best drivechain for beach, seaside, coastal, winter, generally salty environment?

I live by the beach. Although I guess this is a similar problem to those who ride on salt-laden winter roads... It does take a while but, as evidenced by the endless bikes abandoned around the ...
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  • 395
5 votes
2 answers
244 views

How do I adjust a Shimano RD-M6000 properly?

I've got 2 new fat Bikes (Framed Minnesota) with Shimano RD-M6000 rear derailleurs on them. (And another with an RD-M4120.) They're all using Shimano Deore triggers from the same line. I am having a ...
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0 votes
1 answer
255 views

What's the difference between a Shimano RD-M6000 and an RD-M4120?

I ordered some family bikes recently, and all were supposed to come specced with RD-M6000 medium cage rear derailleurs. The first one out of the box has an RD-M4120, which is a cheaper model, as far ...
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6 votes
1 answer
509 views

Will my mix-and-match drivetrain work?

I'm currently assembling a 3x9 speed commuter bike with the following groupset details: Crank: Shimano Tourney TY501 FD: Shimano Tourney TY510 RD: Shimano Altus M2000 Chain: Shimano 9 speed Sprocket: ...
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8 votes
2 answers
1k views

Rear derailleur too far out

All I did was change the rear tyre and now the rear derailleur can only access the highest 4 sprockets out of 7. I have followed Parktool videos on adjustments (including pulling the cable probably ...
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0 votes
1 answer
66 views

Chainstay Protector, Will it interfere with rear derailleur gear cable?

I have a chainstay protector wrapped all around the chainstay. Will this affect the rear-derailleur gear cable which on my bike is externally routed?
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  • 571
1 vote
1 answer
85 views

Do you need to change your rear derailleur if you want to upgrade your bike from 7 to 9 speed?

Well i was thinking thats is it ok if you use your stock rear derailleur if you upgrade you cogs/sproket?
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4 votes
2 answers
479 views

Largest sprocket below derailleur specification

I will install a Deore RD-M6000 derailleur on a bike that already has its cassette. The Shimano RD specification claims for a 32 to 36 largest sprocket, but my cassette (almost new) is a 11-28. Is it ...
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  • 669
4 votes
1 answer
240 views

9 speed cassette and shifter with an 11 speed derailleur, will it work?

So recently my uncle gave me a Deore M5100 11 speed RD, but my current setup uses an Alivio shifter with a LTWOO A5 elite RD and an 11-46T cassette. While yes the LTWOO RD is designed to handle a 46T ...
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  • 41
10 votes
4 answers
2k 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)! ...
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  • 109
4 votes
2 answers
121 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 ...
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  • 53
0 votes
1 answer
123 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 ...
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  • 155
1 vote
1 answer
184 views

9 speed Shimano Deore derailleur compatibility

Will a 9 speed Shimano Deore derailleur be compatible with my 13-32 tooth freewheel?
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  • 91
3 votes
2 answers
437 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 ...
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  • 571
1 vote
1 answer
210 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
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  • 11
4 votes
3 answers
918 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 ...
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  • 139
4 votes
1 answer
103 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 ...
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  • 91
0 votes
1 answer
98 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 ...
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  • 3
2 votes
3 answers
244 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). ...
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  • 139
2 votes
3 answers
2k 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 ...
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  • 179
1 vote
1 answer
131 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. ...
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  • 179
2 votes
3 answers
287 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 ...
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  • 571
1 vote
1 answer
229 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 ...
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  • 113
7 votes
0 answers
292 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 ...
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  • 639
5 votes
1 answer
233 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 ...
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  • 293
2 votes
1 answer
100 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 ...
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  • 309
1 vote
2 answers
162 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 ...
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  • 21
3 votes
3 answers
430 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 &...
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  • 31
4 votes
5 answers
2k 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 ...
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3 votes
1 answer
152 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 ...
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-3 votes
1 answer
96 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 ...
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  • 12.4k
1 vote
1 answer
101 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 ...
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