Questions tagged [derailleur-rear]

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

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2 votes
1 answer
49 views

Determining the correct gear ratio for rear wheel cassette

This is a continuation from my previous topics: determining the rear fork spacing of giant escape 2 2013 rear wheel cassette hub and speed set compatibility question Summary: My bike's (giant escape 2,...
  • 195
-2 votes
0 answers
104 views

The rear derailleur (Shimano Acera) does not tension the chain - it actually springs in the opposite direction which is not helpful!! Help please

I was given this bike in a dismantled state. I cannot contact the owner as I don't know their contact details. The derailleur was already in this state where the spring appears to pull the wrong way....
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1 vote
1 answer
84 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 ...
4 votes
2 answers
154 views

Rear wheel cassette, hub and speed set compatibility question

My bike's rear wheel was recently stolen so I am looking to replace it with a second hand one now. However I don't have much experience/knowledge about speed gear and cassette compatibility. My bike ...
  • 195
1 vote
1 answer
75 views

Bad chordal action in high gear

On my smallest rear gear, the chain vibrates pretty noticeably causing it to "smack around" my front derailleur. It also produces a slight clicking noise from the rear of the bike. I've ...
4 votes
1 answer
252 views

Shimano RD-TY20 "Direct Attachment" rear derailleur mount style replacement

I have a Shimano RD-TY20 derailleur with a date code of 1989. It is mounted on a frame which is marked as 1984. This frame is made of steel, and the derailleur hanger is part of the frame. I want to ...
2 votes
1 answer
47 views

7700 Dura Ace shifters with modern rear derailleur - Shifting issues

I have a 22 year old Trek 5500 with the original Dura Ace groupset. To make the shifting more knee friendly, I decided to get a 11-34T cogwheel. The old Dura Ace 9-speed rear derailleur won't handle ...
2 votes
2 answers
100 views

Can I attach a Rear Derailleur to this bike?

I really want to put a six-speed free wheel on here and a rear derailleur but I don't know if this bike will accept a RD. Does anybody know if I would be able to add a hanger or if I can do a Direct ...
5 votes
1 answer
92 views

Loud clunk moving to smallest sprocket

When I shift gears to the smallest sprocket it makes a very loud clunk sound. There's also a lot of movement in the chain, like a bounce. I've taken a video demonstrating this Video of clunk I'm ...
3 votes
1 answer
311 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'...
7 votes
2 answers
741 views

Two locknuts and a washer (want to be sorted out)

It appears I did not sufficiently heed the first rule of disassembling something: carefully observe the order (and side) of where things come from. Three quick questions: The image below shows an 8mm ...
  • 6,699
4 votes
3 answers
848 views

Does the rear derailleur have a range of motion that exceeds that needed to move between the planes of the smallest and largest sprockets?

The distance between the plane of the largest sprocket and the plane of the smallest sprocket in a Sora cassette is about 34 mm. When the rear derailleur cable is untethered, the spring in the rear ...
  • 6,699
3 votes
2 answers
51 views

11-36 11spd Cassette with Shimano RD-M8000-GS?

I'll try to be concise here, but lots of numbers coming your way... Currently running Shimano 1x11spd, 11-46 cassette with RD-M8000-GS rear dr. The three lowest sprockets are -32-37-46. The derailleur ...
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3 votes
1 answer
201 views

Shimano 105 rear derailleur is very noisy on bigger cogs

my Shimano RD-5800-GS rear derailleur is very noisy on bigger cogs, especially when being in the bigger chainring at the front. On smaller cogs it's not so bad. I had this problem with it since i ...
2 votes
2 answers
630 views

9 speed Shimano (shifter+derailleur) + 8 speed cassette

At the moment I have a wheel with a Shimano 8speed cassette (HG30-8I) (11-30 or 32T) and also I have following rear derailleurs: XTR (RD-M952) (9 sp) GS Altus (RD-M310)(7/8 sp) SGS Questions: ...
2 votes
2 answers
145 views

Modify/hack rear derailleur cage size

I've listened that it is possible to modify the cage size of a rear derailleur. For instance reducing a long (SGS) to a medium (GS) or short (SS) cage size. Is it possible on all brands? Just shimano? ...
0 votes
1 answer
71 views

Shimano STx rc 8515 rd mc38 rear derailleur , what replacement jockey wheels will fit on this

As they do not make the pulley wheels for this derailleur anymore because it’s old can you please tell me what modern Shimano pulley wheel will fit this.
1 vote
1 answer
518 views

Is Shimano Deore M5100 Rear derailleur compatible with Shimano 105 11-speed groupset?

I have a road bike equipped with full Shimano 105 11-speed groupset from top to bottom. The current rear derailleur is RD-5800. Is it ok to replace it with a Deore M5100 Rear derailleur, which is also ...
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3 votes
2 answers
455 views

Can I Mix a 105 Rear Derailleur with a Sora Groupset?

Update: It's a Sora road group set, so 9 speed on the back with 11-32t cassette, and double on the front (50-34 I think). And I do want to add more gears if possible, so 10 speed or more if possible. ...
5 votes
2 answers
509 views

How can I get a lazy rear derailleur to move all the way into smallest cog position?

I have a Microshift Marvo XE rear mech, 9 speed, on a little recumbent I made. It's been a decent derailleur, but recently, when in the smallest cog (11-32 cassette back there) it does the "clunk-...
2 votes
1 answer
223 views

Swapping a 12 speed 11-30t to 11-34t cassette Ultegra

I currently have a 12 speed 11-30t cassette on the back and 35x52 crank upfront. If I change to a 11-34t cassette, do I need to adjust anything? (for example RD adjustment if so, what should I adjust. ...
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10 votes
4 answers
1k views

Are brifters meant to spin/slide on impact, by the choice of a low attachment-bolt torque?

One delicate and valuable part on a bike, the rear derailleur, is attached by a sacrificial part. The derailleur hanger is designed to be weak and to bend on impact, sparing the derailleur and the ...
  • 6,699
1 vote
1 answer
64 views

Shimano GRX Hub + CS-M8000

I fitted a second (nearly identical) wheelset, and now my derailleur indexing is not working. Shifting into the last sprocket is not working, and there are a lot of gears over the range not working ...
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2 votes
1 answer
84 views

A Derailleur (short, medium cage) for a 34T max. cog ring sprocket (1x7)

I need suggestions from experience or a table 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 ...
3 votes
1 answer
115 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 ...
7 votes
1 answer
494 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 ...
2 votes
3 answers
373 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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3 votes
1 answer
181 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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3 votes
1 answer
229 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 ...
4 votes
1 answer
2k 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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4 votes
2 answers
96 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 ...
6 votes
3 answers
1k 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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8 votes
2 answers
558 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
404 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 ...
1 vote
0 answers
83 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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2 votes
1 answer
154 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. ...
5 votes
2 answers
919 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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3 votes
1 answer
136 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 ...
4 votes
3 answers
725 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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0 votes
1 answer
638 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 ...
3 votes
2 answers
865 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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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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5 votes
2 answers
499 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 ...
0 votes
1 answer
710 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 ...
6 votes
1 answer
533 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: ...
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 ...
0 votes
1 answer
95 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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1 vote
1 answer
136 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?
4 votes
2 answers
491 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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4 votes
2 answers
635 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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