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Questions tagged [derailleur-rear]

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

1
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2answers
137 views

Old time bike. Can I put a rear derailleur?

Hi guys, I am looking to build up an old timer bike and I have found this frame. Can I put a rear derailleur in that socket?
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1answer
67 views

Should I replace the bent Derailleur hanger?

My friend (also on a bike) collided with me while we were riding together. As a result of the collision, I now have a bent derailleur hanger. Should I replace it alongside the Derailleur? The bike ...
7
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2answers
818 views

What could have caused a rear derailleur to end up in the back wheel suddenly?

This is a similar question to What exactly happened to my rear derailleur? but with some significant differences. My bike had recently been serviced (about 3 weeks/500 km previously). All that had ...
1
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2answers
86 views

Is my rear shifter broken? Ultegra 6800 shifter, 11 speeds, 9 clicks, only 8 causing cable tension change

I was riding and noticed that I wasn't getting to the two or three smallest gears. Shifting along the eight or nine largest gears were fine though. I checked the limiters and the cable tension and ...
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2answers
94 views

What is the the difference between the new MTB Altus, Alvio, Acera?

What is the difference between these derailleurs. I want to change my derailleur and don’t know which one is better.
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2answers
127 views

What parts do I have to change if I want to change my derailleur to higher speed?

I want to change my derailleur from a Tourney TY-300 to an Altus M2000. What bike parts do I need to change? I want to change my derailleur because i mostly ride forest trails and I have heard the new ...
1
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0answers
26 views

What is the thread size/measurement of the derailleur barrel adjuster?

The barrel adjuster threads on my commuter bike's RD have been marred when the barrel adjuster got bludgeoned on a side crash and I want to chase the threads before screwing in the replacement barrel ...
6
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4answers
666 views

Do oversize pulley wheels increase derailleur capacity?

Do the large custom pulley wheels and cages increase the capacity of a derailleur significantly? There are reasonably priced ones on E-bay with 16t pulley wheels. Every demo of these I've seen says ...
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2answers
53 views

Deore RD M592 with old school shimano trigger shifter

I have an old school Devinci Coyote (2002) whose Alivio rear derailleur is having trouble shifting properly. I was wondering if I could replace it with a new Deore M592 without having to change the ...
2
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2answers
151 views

What replaces Shimano Deore LX rear derailleur RD-M570?

They stopped making my current derailleur in 2003. I need to replace it. How do I choose a replacement part? A good answer will tell me a specific part (with part number) that will replace the RD-...
1
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1answer
42 views

SRAM Apex 1 doesn't upshift

I have a Boardman CXR 8.9, everything stock except for new mech hanger. It has a 11-42 cassette with a 11 speed 1x drivetrain. It's Sram Apex throughout, no mixing and matching like in other questions....
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2answers
423 views

Upgrading From a 9 Speed Sora Derailleur?

I bought a bike on Ebay which has a Sora groupset. The rear derailleur is noisy and jumps in and out of gears despite much tweaking. I've given up on it. What derailleur can I buy that will work as a ...
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3answers
140 views

Change Derailleur on CX Bike

I have a Giant 2013 TCX Advanced. It has a Rotor 3DF, 36/46 Crankset and a SRAM XG1190 11x28 cassette. I'd like to swap the cassette for an 11-40 or 11-42. The guys at Wolftooth said: "..derailleur ...
1
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1answer
118 views

Why did my rear derailleur fail in the middle sprocket?

Yesterday, I replaced my cassette and chain, having ridden the previous ones through the winter, and re-indexed my rear derailleur and checked the limit screws. Today, I had ridden slightly less than ...
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0answers
91 views

Can't get in first gear on Shimano ten speed block

Just replaced drive chain on mtb ... new cassette (Shimano 10 sp ) new chain (Shimano 10sp) new rear mech (Shimano 10sp long) and new (Shimano 10sp). I've set bottom stop tensioned cable and adjusted ...
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2answers
129 views

SRAM x5 derailleur fitting

So I am a complete novice when it comes to bike maintenance but working on a project mtb, old Saracen rufftrax. The rear derailleur was knackered so fitting a new SRAM x5, my question is do I need to ...
4
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3answers
132 views

I replaced my rear hub, but I'm not sure about how to attach the derailleur

I'm new to working on bikes and have been unable to find an answer via the internet, which, too be honest, is probably really simple. I got a bike just for riding around the city that had a cheap hub ...
2
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0answers
104 views

SRAM eTap rear derailleur chain drop issue

I’m having an issue with my chain falling off the lower pulley wheel when (1) I hit a significant bump or (2) shift from large ring to small ring. But only in cogs 6, 7, 8. Any suggestions? I’ve ...
1
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1answer
110 views

Pros and cons of long and short derailleur cage?

I'm thinking of buying a new derailleur in the future, but I don't know what type of derailleur to buy, there's long and short cage derailleurs but is there any differences? I'm not sure if this ...
14
votes
4answers
2k views

What options do I have if my rear derailleur breaks when I'm out on a trail?

I ran into an unfortunate situation earlier this week. I was out on a mountain bike trail, alone — just me and my hardtail. I'm pedaling, when I suddenly hear a CRUNCH and my bike stops. The hanger ...
6
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1answer
1k views

Eagle chain B-gap adjustment without plastic tool

SRAM makes this plastic tool for adjusting the B-gap on their Eagle derailleurs. My question is, if I want to measure this distance without this tool (say with a caliper instead), how should I go ...
3
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2answers
912 views

Sunrace 10 Speed 11-46T cassette rear derailleur compatibility

I would like to know: What rear derailleur (RD) was the "Sunrace 10 Speed 11-46T" designed to work with. Is there a compatibility chart ?
2
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2answers
434 views

Momentum of rear derailleur wheels?

I have new derailleur and I am somewhat surprised that when I try to spin it with hand (no chain is mounted yet) it basically has no momentum, it almost immediately stops. Almost any other spinning ...
3
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2answers
96 views

Rear derailleur has trouble switching gears on the way up, but works perfectly on the way down?

I noticed an issue with my gears switching recently so I decided to try indexing them. I've gotten to the point where going from the smallest cog to the largest works perfectly, but in the other ...
2
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2answers
58 views

Halfway through changing rear gear out cable

I stupidly started changing the outer casing on my rear gear without having cable cutter ready. Suffice to say I've messed up the cut and now I can't get the gear cable though the outer casing. My ...
1
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1answer
73 views

Servicing/tensioning a rear mech

I have a Tiagra 4600 10 speed rear mech (mid length) which is sluggish to shift into higher gears. Shifting was all over the place, I’ve replaced the jockey wheels and checked the hanger alignment. ...
0
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1answer
80 views

How to keep a component “pressed” so the chain remains hooked?

I am really at a loss of words to describe my problem, so apologies in advance for the poor choice of words in the title. Basically I have this component at the rear wheel (which I think is called ...
0
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2answers
239 views

Installing SRAM X3 7-speed shifter with Acera derailleur : shifting stops at 4th cog

I've never installed one of these trigger shifters. Here's what I'm doing: Acera derailleur has chain on the smallest cog. Mount trigger shifter on handlebar with its gear set to 7. Run cable to and ...
1
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2answers
109 views

Will any Shimano mountain bike shift cable set work with any Shimano mountain bike derailleurs and shifters?

(Forgive me if this question has been asked before - but I don't know if I'm searching with the correct keywords to find the answer...) My rear derailleur cable is stuck hard into the side of its ...
2
votes
1answer
328 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 ...
2
votes
1answer
285 views

My Shimano Tourney RD-TY22 7–21 speed bike rear derailleur mech, direct attach has broken, need a replacement, preferably newer

To cut a long story short, I have a full suspension mountain bike. Its rear derailleur mech (see title) is broken, had a trip round the spokes and age has degraded the main springs. I therefore need ...
0
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1answer
100 views

Shifting issues

I just finished some repairs on my bike, (Mongoose 26" 21 speed). I noticed that for some reason when I try to shift using the shifter, it won't shift to the lower gears. I can't get past seven. I ...
0
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2answers
223 views

Acera rear derailleur / freewheel compatibility

I'm looking at buying an e-bike conversion kit with a rear geared hub motor that requires a freewheel. On my current bicycle, I've an 8 sprocket cassette (Shimano HG CS-HG41-8an) and my rear ...
3
votes
2answers
237 views

What type of rear derailleur is used on my bike?

Direct mount or hanger mount? Sooo, one glance at these photos will tell you why I'm asking this... Needles to say, I need a new one and I'd like to know what I should be looking for. It's for a 21-...
1
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1answer
78 views

Replacement rear derailleur

Recently damaged the rear derailleur on my old city bike - the derailleur is a Shimano integrated 6-7 SIS Max 28t - which is no longer manufactured. I can get a used replacement via ebay but was ...
3
votes
2answers
170 views

Is it possible to service rear derailleur pulleys?

The outer pulley of my RD-M735, when spun, sounds scratchy and feels slightly grindy as if there is a tiny piece of dirt/grit that has fallen inside. I have literally soaked it in WD-40 and then 3-in-...
16
votes
4answers
3k views

10 gears to singlespeed

My second hand Hercules bicycle came with 10 gears. Two gears in the front and five in the back. The gearshift does not work well and since I cycle in the same gear all the time anyway, I consider ...
2
votes
2answers
451 views

Can I put a hanger derailleur on a direct mount frame?

I have a road bicycle whose threads for the direct mount derailleur are stripped in the frame. Is it possible to use a hanger derailleur instead? Are there other options?
9
votes
2answers
454 views

Rear derailleur cage hits largest cog on cassette

I got a new rear derailleur for my wife's bike after a stick turned the original one into a twisted mess of metal. The derailleur is a Shimano Acera, the cage is slightly longer than the original. ...
2
votes
2answers
10k views

Cannot shift into lowest gear

I've been fiddling with my rear derailleur trying to fine tune it, because I just replaced my entire drivetrain (same components, but new) The problem that I'm facing now is that I can't seem to ...
2
votes
2answers
267 views

New derailleur - shifts up smoothly, or down - but not both

I've just replaced the rear derailleur and cassette on my bike. I have Shimano Tiagra 9 speed shifters. The cassette is now a 9 speed 11-32 and the derailleur a Sora RD-R3000-GS. I've set the limits ...
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5answers
761 views

Remove old non-indexed levers for gear changing to make “fixed” speed bike?

I recently got an old bicycle for the sole purpose of using it on a trainer. It has old non-indexed levers for gear changing and they don't seem to work OK. The front one slips into lower after a ...
9
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2answers
1k views

Why is cross chaining 'bad', but 1x is OK?

When you run 1x, aren't you basically force to cross chain?
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3answers
526 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 ...
3
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2answers
245 views

Best Way to Upgrade My Bike

About three months ago I bought a second hand bike for £70; to be honest it is reasonably good. Current setup for gears is a 2 x 18 (38-48 front, 13-28 rear). As far as I can tell it's not a branded ...
13
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2answers
897 views

Bike chain slips in a strange way

I bought a new bike about a month ago. And it made a strange sound from the first ride , I thought the sound was because it was new and will disappear with time but it didn't. The sound is like a ...
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2answers
398 views

Is this regular chain/pulley noise or is there someting I should check/adjust?

Extra images I'm 99% certain the noise is coming off one or both of the derailleur pulleys, but not sure if it's to be expected or if it's irregular and something that should be fixed? Edit Just ...
2
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1answer
2k views

Ultegra 6800 shifter with R8000 rear derailleur?

I'd like to replace a Shimano 105 5800 11-28 cassette on one of my bikes (CAADX 2016) with a CS-HG800-11 11-34 to get a wider range of gears. My rear derailleur is Ultegra RD-6800-SS, which can't ...
1
vote
3answers
164 views

Rear derailleur moves to much for each click - tried everything

Two years ago I build a bike (flat bar) with SRAM 1x11. Around a month ago the rear-derailleur broke (guide pulley broke). I bought a new rear derailleur: Shimano 105 RD-5800-GS. After installation ...
0
votes
1answer
74 views

Derailleur tension causing chain friction?

I have a foldie which recently seemed a bit harder to pedal. Specifically back pedaling seems harder than it should be (if I kick the pedal back, it barely travels a quarter or half turn. I noticed ...