Questions tagged [derailleur-rear]

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

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3answers
21 views

Shimano Tourney “Rapid Rise” Rear Derailleur Installation

I'm trying to set up an old mountain bike that has a Shimano Tourney "Rapid Rise" rear derailleur which appears to operate in the opposite direction to the Shimano Acera derailleur on my own ...
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1answer
57 views

KMC Z7 chain for 8 speed cassete

Can I use KMC Z7 chaing (1/2 x 3/32) on 8 speed cassete Sunrace MFM-56? When I changed the old chain with KMC Z7, the smallest sprocket and the largest are fine. But in the between the shifting is ...
4
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3answers
172 views

Why rear derailer has limit on front chainring difference?

Just as an example, Shimano RD-M786-SGS (as most other RDs) specification says "Max. front difference: 22T". Why is rear derailler limited in front max difference? It is clear that it is ...
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2answers
62 views

8 speed flat bar set up with Dura Ace RD-7700 or new Claris RD-2400

I'm buying a new drivetrain (cranks, cassette, chain) for my flatbar commuter that was mostly built of parts. I currently have a Dura Ace 7700 short cage derailleur on it, I got it from a friend a ...
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1answer
32 views

Mix Match Using Wolftooth Tanpan

My current setup are using a full Shimano 105, medium cage GS 11-34t, crank are 50-34t. Through some digging, I want to upgrade the RD using Deore XT M8000 SGS Long, paired using wolftooth tanpan. ...
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1answer
1k views

Shimano 105 5800 mech compatibilty with 5700 shifters

I have purchased a Shimano 105 5800 11 Speed Cassette 11-32, 116 link chain (CN- HG600-11) and longer-caged 'GS' rear derailleur (RD-5800-GS) to replace my original 105 10 speed 5700 series mech. Can ...
6
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3answers
431 views

What is going on with my derailleur?

I was on a ride a few months ago and while shifting, my chain came out of my derailleur. So this is a little confusing. Let me explain. The chain was resting on the outside of the bottom part of the ...
7
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3answers
21k views

Choosing a rear derailleur for 11-42t cassette on a SRAM 10-speed 1x system

I have an 11-42t 10 speed cassette and a 42t narrow wide chainring. I cannot work it out definitely whether a Sram long cage rear derailleur will work with it. I think that this one should work but ...
2
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1answer
56 views

Chain alignment on jockey wheel

Going over the lower jockey wheel (see first picture), my chain rubs against the inboard side of the cage and sometimes snags. It is a brand new derailleur (Shimano Acera M360) and a new derailleur ...
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1answer
48 views

Drivetrain problem!

I have had issues with the drivetrain on my bike. I believe I've pinned it down to two issues. The Shimano Deore XT SGS (long cage) 9 speed rear derailleur needs replacing. It was either damaged when ...
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0answers
141 views

My derailleur completely “opened” up. It is now almost a straight line. What have i done to my derailleur?

I had a flat on the side of the road. So I took my wheel off to replace the tire with a temp to get me home. When I reinstalled the wheel, the derailleur "opened up" completely...what have ...
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0answers
35 views

Bracket axle for Shimano RD-2300 rear derailleur

Where can I find a bracket axle for Shimano RD-2300 rear derailleur? I searched everywhere and I didn't find one. I need to mention that the frame type is Speed Fitness Alloy and bike is a Focus ...
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1answer
75 views

Is it possible that a too tight rear wheel quick release can cause shifting issues?

It seems that is the case with my rear QR/derailleur. If QR is really tight it's impossible to get the shifting quite right. Could it be because of material fatigue in my derailleur hanger? It's been ...
4
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1answer
513 views

Shimano Acera hits spokes. Which screw to turn?

I have a Shimano Acera that hits the spokes in first gear (largest rear sprocket.) I found three screws on the derailleur Which one should I turn, in which direction? The bike (Specialized Sirius 2.0) ...
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0answers
31 views

Derailleur can't shift to 51-T sprocket. Deore CS-M5100 + RD-M5100

ISSUE: When attempting to shift to the largest cassette sprocket, the side of the derailleur cage contacts the 51t sprocket, so the chain is not able to go up the gear. WHAT I DID: My drivetrain was ...
4
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1answer
54 views

Shimano TZ rear derailleur cable entry at strange angle causing wire rub

I have a cheap (but very nice!) secondhand bike I bought that I am slowly servicing/repairing using YouTube, forums etc. I am stuck on the rear derailleur, I can index it properly and it shifts fine, ...
14
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6answers
8k views

Why is a derailleur guard present only on more affordable bicycles?

Looking at http://decathlon.co.uk, I see a derailleur guard only on more affordable bicycles, e.g. this one. This one does not have it, and there seems to be no obvious way to install one. Are ...
3
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3answers
73 views

Shift lever tight when cable clamped in derailleur, adjustments seem futile

I have a 2020 Giant Trance 2 I purchased new at the beginning of June 2020. Recently I had to replace my shifter cable (I broke a ferrule and the cable was fraying and very short, so I figured the ...
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0answers
56 views

Rear derailleur adjustment

I have a 7 speed Shimano derailleur. It shifts really good from 1 to 6 but when I try to shift from 6 to 7 it just doesn't want to shift. Can someone help me?
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3answers
86 views

My bike shifting won’t surpass 6

I own a Scott Aspect 740. On the shifter it says it is on gear 7, 8 or 9 however in reality on the rear derailleur the chain is only on 6 and won’t go past this. I’m looking for a fix as it is very ...
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0answers
47 views

Using 11-36t 9 speed derailleur with 11-40t 9 speed cassette

So I've got the shimano altus rd-m2000 and it says that it only supports 11-36t. However, I've seen people on forums say that it's possible with this derailleur. Even it I was wondering if with a ...
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2answers
100 views

Can Shimano Claris R2000 shifters be paired with Claris 2400 derailleurs?

Can I use the modern looking shifters with the older model derailleurs without any problems in shifting?
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1answer
95 views

Chain slips off chainrings with a lot of pedal force

I have a 2001 Raleigh R600 road bike. It wasn’t ridden much when I got it, and I’ve recently been putting some miles on it. It was a 3x9 speed with 9 speed components. I just changed: Wheels Cassette:...
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1answer
35 views

Determining if there is too much chain tension on 1x setup with XT clutch derailleur

I've outfitted my 2016 Giant TCX with a 1x 42t in the front and 11-40 in the rear. I'm finding that with the clutch engaged shifting into the 40t in the back is "harder" and it feels like ...
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0answers
23 views

Shimano mechanical vs Di2 bracket axle unit difference

This puzzled me for a while, but I couldn't find an answer. Why are some mechanical and Di2 bracket axle units different? The interface on the RD body is the same, you can mount both to the same ...
3
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2answers
175 views

Can someone help me identify this old Shimano derailleur?

I want to poke around online a bit and see if I can find anything out about it. It's a long cage, on an old 18 speed Univega MTB. Thanks.
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0answers
63 views

Direct mount rear derailleur

I'm upgrading an old MTB for commuting, it had a 5 speed on the back but I'm going to be putting on a new 26" rear wheel with a 7 speed cassette because the freewheel axle wobbles, makes noises ...
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1answer
61 views

Suntour derailleur compatibility with shimano shifter

I bought today a bike with a Suntour rear derailleur (XR 150 8 speed) for my daughter. It has old rotating shifters I with to replace with triggers. Will a shimano 8 speed (e.g. Altus/Acera) fit this ...
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1answer
57 views

Shimano inner cage plate replacement

I have a broken inner cage plate on my Shimano Ultegra RD-6700 GS rear derailleur. This replacement part # is Y5VG09300, and I can't find this part anywhere. I'd really hate to throw out a perfectly ...
3
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1answer
61 views

Acera M360 upgrade

My 7-speed Shimano Acera M360 rear derailleur fell apart and I now need to replace it. I could simply just buy the same but honestly I never liked it very much and would appreciate something with a ...
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4answers
3k views

What are the causes of rear derailleur chain noise?

My rear derailleur is making some noise and I'm having trouble diagnosing the cause. It seems like it's coming from the rear cogs and sounds similar to chain noise. I'm re-building my bike after an ...
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0answers
55 views

Compatible derailleurs with Shimano RD TY22 with dropout claw hanger [duplicate]

I have an older bike I love with a Shimano RD TY22 WD rear derailleur with a dropout claw hanger that needs to be replaced. I cannot find one listed anywhere. Are there any derailleurs available to ...
3
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3answers
735 views

How to service a Shimano TZ rear mech?

I'm trying to swap out the top jockey wheel on a rear shifter mechanism. The bottom jockey wheel simply unbolted as expected but the top one seems to share a shaft with the main spring rather than ...
4
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2answers
72 views

Can't get lowest gear and derailleur shifts on its own

I have a bike with downtube friction shifters and a 5 speed freewheel. When I bought the bike a while ago the shifters weren't connected so I did it myself. At this point it all worked fine. I took it ...
2
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1answer
60 views

Can I change my derailleur without changing my shifter?

I have Shimano V-Brake 8-speed shifters on my bike. These have the brakes and the shifter in one component. I'd like to change my derailleur can I put in a newer 8 speed Shimano derailleur that will ...
3
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2answers
436 views

Can I use Shimano 105 rear derailleur from 11-speed bike with 10-speed Tiagra shifters?

I have a 10-speed 2013 Specialized Allez Elite with Tiagra componentry (and an 11/28 105 cassette) and would like to install my old Shimano 105 rear derailleur in the back to replace the Tiagra one. ...
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0answers
48 views

What might be causing the faulty shifting on my bike?

I bought a used bike that has 8 speed cogs and 3 speed chainrings. The front shifts great but the back regularly fails on the 6th and 5th speeds. I know a bit about adjusting the shifters so I can say ...
5
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3answers
4k views

Can't find the B-tension screw in rear derailleur

I am trying to register my old rear derailleur (a 15-year-old Shimano "7sis"), and I'm trying to find what every guide calls the "B-tension screw". I looked everywhere and couldn't ...
1
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2answers
81 views

Chain touches plate between pulleys

I've replaced chain and dropout hanger. The rear derailleur is Shimano Claris. When I'm turning pedals chain (Shimano hg-71) is touching small plate (marked with red arrow) between high (closer to ...
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2answers
72 views

Campagnolo Super Record H Screw

I am having trouble adjusting the shifting on my Campagnolo Super Record rear derailleur. I have set the high and low limit. I think the main problem now is that the jockey wheels are too far away ...
4
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4answers
4k views

When down-shifting my rear derailleur (Campagnolo 10spd) is skipping multiple gears.

The problem feels like it is in the shifter as it just "lets go" when I press it. I'm told it could be the G spring. Is it something in the derailleur or the shifter? If its the shifter is replacing ...
3
votes
1answer
147 views

Sram Eagle NX Rear Derailleur not reacting to cable tension

Have had a SRAM NX Eagle rear derailleur (bike is a 1x) on my YT Jeffsy for about a year and a half. For about the first year, worked awesome, indexed the gears a few times and all was good. Last half ...
0
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1answer
112 views

Why does my Shimano Deore SLX dérailleur not rotate into the expected (vertical) position?

I have a Scott E-Genius 730 Plus mountain bike (around three years old). I had a chain snap recently, so I have replaced the rear 10-speed cassette, and am now trying to route a new chain correctly. I ...
0
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1answer
134 views

Direct mount vs. hanger derailleur

Currently repairing a bike that I got off the road for free years ago. Around three years ago, a stuck link caused a chain jam while pedaling at high speed, causing the metal around the b-knuckle on ...
3
votes
1answer
826 views

Road STI with MTB Derailleurs

Not that this question hasn't been asked to death but I'm experiencing very poor shifting, here's my setup: Shifters: ST-5700 (10-Speed Road) Derailleur: M6000-SGS (10-Speed MTN) Cassette: Sunrace ...
1
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3answers
911 views

Shimano 11 speed component combinations

I want to upgrade my bike to a 1x system using a Shimano GRX-crank upfront. I however have a flatbar and can thus only fit flatbar shifters. What is the lesser evil? 11-Speed XT derailleur with XT ...
13
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1answer
26k views

Which pulley is which on my Shimano STX RC derailleur?

I disassembled my rear derailleur to clean it; when I removed the sprockets they basically looked the same; both jet black and caked with all sorts of black grease-like-stuff. I figured they were the ...
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2answers
69 views

How do I figure out what the model number is of my Shimano rear derailleur?

Here are pictures of my current derailleur I need to replace.
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2answers
176 views

I think I have installed my new rear deraileur incorrectly, can anyone give me some advice

I have replaced the derailleur on my daughters Dawes Academy 26, but I think it looks wrong. On the lowest cog (gear 8) the derailleur looks like this: enter image description here: I assumed that ...
1
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1answer
74 views

How do I determine the “length” of this derailleur?

What length is this derailleur please. Cannot determine if its a short, medium or long.

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