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Questions tagged [derailleur-rear]

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

8
votes
3answers
439 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 ...
5
votes
1answer
52 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
votes
2answers
213 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
votes
2answers
410 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 ...
2
votes
2answers
74 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
votes
2answers
52 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
vote
1answer
63 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
votes
1answer
72 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
votes
2answers
33 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
vote
2answers
72 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
127 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
87 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 ...
-1
votes
1answer
99 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
votes
2answers
63 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
170 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
vote
1answer
68 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
101 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
234 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
234 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
2k 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
124 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 ...
4
votes
5answers
680 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
votes
2answers
1k views

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

When you run 1x, aren't you basically force to cross chain?
1
vote
3answers
200 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
votes
2answers
211 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
votes
2answers
840 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 ...
0
votes
2answers
124 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 ...
1
vote
1answer
1k 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 ...
0
votes
0answers
56 views

Gears shifting when bouncing on mtb

I got my motobecane partially disassembled and I did all tuning and alignment myself. Being a new joiner it makes me feel I am missing some point. The issue is when my bike is on the stand the ...
1
vote
3answers
124 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
59 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 ...
3
votes
3answers
78 views

Replacing Spark 720 2015 derailleur + hanger using markings

Broke my rear derailleur a week ago along with the hanger. On my Spark 720 year 2015, the old hanger said 142-RWS12 IDS-SL so I ordered a new one from eBay: https://www.ebay.com/itm/SCOTT-23528...-/...
0
votes
2answers
269 views

Bike shifts well for low gears OR high gears - but not both

I have been having issues with my 9-speed rear derailleur and was hoping somebody could help shine some light on it. Thanks in advance! I can adjust my rear cable tension such that either the few top ...
3
votes
1answer
300 views

Parking rear-wheel first: which sprocket to put rear derailleur in?

So, I want to keep this from happening: To that end, I like to park my bicycle rear-wheel first, which was discussed in answers to this question, where I'm taking the images from. Since almost ...
3
votes
1answer
345 views

Will Shimano M6000 Rear Derailleur SG (medium cage) work with cassette other then 42t?

I was thinking about buying Shimano Deore groupset to upgrade my ride, checking both older M610s and newer M6000s. The hitch is I want 2x10 set commuter flavor. That means narrow ratio cassette, like ...
2
votes
1answer
74 views

Can I upgrade a Hercules Dirtrider 26" with gears and a disk brake?

I found that dropouts are needed for derailleur setup & fork space>120mm...can I install any hanger or weld a dropout to the frame?...and also the fork end gap was around 105mm in wheel fitted ...
4
votes
2answers
221 views

DX derailleur 1990 maximum teeth?

I'm trying to upgrade my cassette on a (commuter road bike) bike that uses a Shimano rear DX derailleur from ca 1990. What would the maximum tooth count be for this RD? The model says rd-m650 but I'm ...
4
votes
1answer
101 views

XT derailleur 1995 maximum teeth?

I'm trying to upgrade my cassette for lower gearing on a Nishiki Continental. The previous owner put on a (NOS) Shimano XT rear derailleur. I use friction shifters. I looked on the back of the cage ...
2
votes
0answers
162 views

Why do SRAM rear derailleur not have a parallel movement

My SRAM rear derailleur (Rival 22 circa 2016) has a non parallel movement. When it is in the lowest gear, the cage and pulley sprockets align with the cassette sprockets, but when it's in the highest ...
2
votes
2answers
1k views

Determine which cage length on Shimano Ultegra 6800

How can I determine which cage length is on my road bike? I have a Shimano Ultegra 6800 groupset, with 11-28 casette and 52-36 chainrings. I found this resource, however, I measure 60 mm between the ...
0
votes
1answer
46 views

Upgrading an old Trek

I have an old Trek from the early 80's, the serial number says its either a 610, 613, or 614. A lot of the parts are getting old and I'd like to replace a lot of them. One part that I an not sure on ...
4
votes
6answers
2k views

Fitting a 9-speed 11-50T cassette on MTB: which derailleur?

I'm trying to understand if its possible to fit a 9-speed 11-50T cassette (found one on Ali) on my MTB. The plan is to go 1×9. The problem is that I can't seem to understand the if a specific ...
3
votes
1answer
45 views

Rear wheel replacement: freewheel -> freehub and cog size changes

I've replaced the rear wheel on my bicycle. The new wheel is different in two respects: I got a 8-speed freehub because 7-speed freewheel hubs seem to be difficult to find these days. I had a 7-speed ...
3
votes
1answer
60 views

Replacing one derailleur with another type

I have an older bike (between 10 and 15 years old), which has a alivio derailleur. It's an 8 speed, and I just replaced the cassette, chain and crank set. I noticed that there was a large amount of ...
1
vote
1answer
104 views

Why is my Ultegra 6600 much noisier when cross chaining compared to my Deore XT M8000?

This has been bugging me for a while. The Ultegra has no visible wear. The chain has no measurable stretch. The Deore is silent even when dirty and not oiled. The Ultegra is much noisier when freshly ...
3
votes
4answers
194 views

Misaligned new derailleur?

I just installed a new Alivio M4000 rear derailleur to replace a Tiagra derailleur on 1X-converted road bike. It looks wildly misaligned to me and shifts terribly. The hanger is perfectly aligned. ...
3
votes
2answers
398 views

Can I use Shimano 8 speed rear deraileur (Claris) with 6 speed SIS downtube shifter (for a 6 speed freewheel)?

So currently I have Shimano SIS downtube shifter (6 speed) with indexing, a 6 speed freewheel, and Tourney TX for the rear deraileur, they index properly. If I want to swap the RD with Shimano Claris,...
3
votes
1answer
412 views

Highest gear “jumps” under load

When I'm in the highest (smallest) gear and pedaling hard, it sometimes "jumps". I'm not sure if that's the right word, but I feel a bump in my feet for a moment and then I continue pedaling. It ...
0
votes
1answer
159 views

Shimano RD-5800 and 7 speed cassette

Is Shimano RD-5800 rear derailleur compatible with a 7 speed cassette?