Questions tagged [derailleur]

Mechanism to move the chain from one sprocket to another.

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1answer
31 views

When I am pedaling hard my chain jumps but doesn’t go to higher or lower gear

I have this problem with my bike when I put an amount of pressure on my pedals the chain kinda jumps but doesn’t change to a higher or lower gear and it usually happens when I go on 3X7 and 3X6 when I ...
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2answers
61 views

Compatibility between Shimano 105 crankset and Shimano Deore derailleur

I have a wild idea to replace a crankset on my Merida Crossway 500 (2014) (which is now SR Suntour NCX-FX-10s 48A-36-26 CG) with Shimano 105 5750 cCompact 10sp (switch from 3-speed to 2-speed). The ...
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2answers
68 views

Is Acera m4000 usable for trails

Can I use Acera m4000 on trails without damaging anything on my bike specially my derailleur
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1answer
57 views

Need Replace for Shimano Altus FD-M310-6 [on hold]

I need to replace my front derailer. I was given a Altus FD-M310-6. but does not work right and is cheap. I would like to get my road bike back on the road.
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2answers
97 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
129 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 ...
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1answer
67 views

Using a Tiagra/105 front derailleur with R3000 shifters

The Sora 2x derailleur mech that came with my gravel bike broke in half. Is the 2x Tiagra/105 front derailleur compatible with the R3000 shifters? Thanks!
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1answer
51 views

Front Derailleur Chainring Size Tolerance

I'm rebuilding an old bike and have an existing crankset with 52-42-30 chainrings. I'm looking for a front derailleur. Most of the triple front derailleurs I've come across say they don't support a 50 ...
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3answers
108 views

Trimming Shimano FD-R3000 front derailleur

My front derailleur is a Shimano FD-R3000. I have been trying to adjust it following the ParkTool video at Basically it seems to be working OK now: the chain is not ...
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2answers
127 views

New build, front derailleur won't shift to outer cog

I'm building a new bike using a Deore T6000 front derailleur with Microshift BS-M10 bar end shifters. I'm having trouble getting the derailleur to shift the whole necessary range and am looking for ...
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0answers
28 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 ...
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1answer
49 views

Front gears won't shift

I am very new to the bike maintenance, but want to learn how to do it myself. I have got a MTB which won't change the gears at front. It's basically stuck in the granny gear at the moment. I tried to ...
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1answer
76 views

Pulley for 10 Gear Derailleur for 9 Gear Chain

I am using a 10 gear XTR derailleur on a 9 gear cassette with a 9 gear chain and the tension pulley of the derailleur looks like needing replacement (despite teeth being very sharp it seems to work OK ...
4
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1answer
81 views

Is the Shimano 2303 crank arm and the 2300 crank arm the same?

I bought a Shimano 2303 crankset (52/42/34 triple) by mistake although I should have bought a 2300 crank If I remove the inner 34t, will it have the same structure as 2300 crank? By structure I mean ...
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1answer
69 views

Adjust deraillers after changing chain?

I just changed the chain on my Cube Acid 2X11sp mtb. I replaced the old chain with an exactly similar brand, model and length new chain (shimano). Is it NECESSARY to readjust and finetune the speed ...
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3answers
134 views

How to cut derailleur cable housing

This is a job I will do very rarely, so I would prefer to avoid buying a specialty tool, if possible. Unfortunately I don't own a dremel. Side cutters just mashed everything and did not cut at all. ...
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2answers
56 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 ...
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1answer
48 views

Maintenance as my Derailleur are squeaking due to the everyday use and carelessness shown while changing gears while the cycle is static

What extra steps should I take to extend the life of the Derailleur gears on my Btwin Rockrider 340 besides oiling them ?
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1answer
74 views

Derailleur play between cage and knuckle

I have a Shimano 2300 rear mech that's done about 10,000m over ~7 years. Lately I've had trouble getting clean shifting and find myself constantly twiddling barrel adjusters... I'm certain the cable ...
2
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1answer
279 views

Is there a front derailer type that can be mounted on a frame without braze on or fitting on the seat tube, or clamping?

As the question says, is there a front derailer type that can be mounted without having a fitting or braze on on the seat tube, or without clamping to the seat tube (because it's a weird shape, or ...
4
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2answers
79 views

Removing Derailleur Hanger from Devinci Spartan

So I'm in need of new derailleur hanger and bolt kit. My question is how to remove the hanger from my kinda frame (2018 Devinci Spartan). I'm used to just using a 5mm Allen key to unscrew two little ...
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1answer
313 views

Replacing Claris FD 2400 with R2000

My bike has a 2x8 speed Shimano Claris 2400 front derailleur and ST-2400 shifters. The FD is damaged. Can I replace it with the newer Claris R2000 FD? Shimano's compatibility guide indicates that it ...
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0answers
45 views

What's the type of polymer material used in friction bushings in Sram rear derailleurs clutches?

The friction bushing of an (older) Sram rear derailleur clutch is shown below. What type of polymer material are these made out of? I'm also interested to know what friction materials are used in the ...
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1answer
84 views

Front derailleur range suddenly has become very short

For a while when I was riding, there was a stiff feeling changing from medium to high on the crank. Yesterday it wouldn't change at all. I checked the adjustment of the High and Low screws by ...
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1answer
63 views

What front derailleur is this? Want to replace/upgrade

Hi I've bought a foldable bike and am thinking of changing the derailleurs to Shimano, but I could not figure out what type it is. The link the to the bike is: https://www.forever-bicycle.com/html/...
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0answers
108 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 ...
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1answer
111 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 ...
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1answer
91 views

Levels of derailleurs, freewheels and chains

What are the levels of derailleurs (Shimano probably) I know Altus and Acera but don't know the higher end ones. I am putting this on my Sondors Fat ebike. I will be using a 7 speed freewheel, and a ...
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4answers
3k 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 ...
1
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1answer
109 views

Broken Shimano FD-R453

I have a Shimano FD-R453 front derailleur that needs replacing. 50t and bottom pull with a 31.8 clamp. There are three gears in the front and 9 gears in the back. Could somebody help me with getting ...
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1answer
59 views

Change derailleur for new cassette?

I currently run Shimano SG-B-53/39 chain rings coupled to a 9 speed 13/23 cluster. If I was to change my cassette to a 9 speed 11/32 would I need to also change my derailleur?
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1answer
83 views

Need derailleur hanger

I have what I believe is a 1994 Cannondale. I need a derailleur hanger and I’m tired of thinking I’m ordering the right one and it’s not. Can somebody please tell me how to find out what my bike is? ...
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2answers
75 views

Shimano STI does not shift up/to lower cogs

Typ: Shimano RS505 2x11 hydraulic Problem: Up shifting is possible to the 5th or 6th cog, after this the STI does not give the click feedback and the derailleur does not move to the next smaller cog. ...
2
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1answer
178 views

Shimano Metrea ST-U5060-R compatibility

So I'm trying to find out if Shimano Metrea ST-U5060-R would be compatible with any Shimano 11 rear derailleur? Also, would it also be compatible with the T4700 Tiagra derailleur since it seems to be ...
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2answers
85 views

How to determine which cassettes I can use with my derailleur?

I am trying to understand which cassettes I can install on my bike. I've understood that the length of the derailleur also determines which cassettes will fit. In my case I have a triple (see picture ...
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1answer
325 views

What is the top sprocket?

I am reading the Shimano specs and I cannot figure out what is the "top sprocket". An example: https://bike.shimano.com/en-EU/product/component/sora-r3000/RD-R3000-SS.html "Low sprocket" (I couldn' ...
2
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1answer
296 views

Can a universal derailleur hanger be a suitable long term solution?

I've recently snapped my derailleur hanger for an old Apollo Raceline Peleton road bike. Have had no luck sourcing a replacement that fits, and neither have local bike shop. Has anyone been in a ...
3
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1answer
275 views

Will Shimano Di2 synchro shift work with an XT (Mountain) rear derailleur with an Ultegra (Road) front derailleur on the same bike?

Basically, can I mix a mountain Di2 rear derailleur (specifically, the RD-M8050-GS) and with a road Di2 front derailleur (specifically, the FD-R8050)? Will firmware updates and syncro shift still both ...
2
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2answers
1k views

10 speed rear derailleur only shifting 7 gears…losing my mind

OK, so I have a rough and ready road bike (Planet X London Road) that is not shifting right.... It is running: Shimano Tiagra 4600 Shifters (3 x 10) but running it a 1x10 with one front chainring ...
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2answers
2k views

What does this barrel adjuster do on the rear derailleur (SRAM Apex 1)?

On this SRAM Apex 1 derailleur, what does this barrel adjuster do? What happens if I turn it clockwise/anti-clockwise?
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3answers
1k views

Cannot shift to lowest gear - chain too short?

I’m in the process of switching from an 11-25 to 11-32 rear cassette. The upgrade has involved replacing the cassette, rear derailleur (short to medium cage) and fitting a new chain. I can cleanly ...
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1answer
122 views

I can't shift gears

My friend gave me his bike because it was too small for him, I was new to biking so I didn't notice till now that T can't switch gears. My front derailleur is on middle gear out of 3 and the rear on ...
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1answer
244 views

Shifter/brake-lever compatibility with front and rear derailleurs

I am currently converting my bike from flat bars to drop bars for a long touring cycle. I used to have Shimano SL310 shifters (8x3), but have now bought Shimano Sora ST-3300 (8x3) to mount on the drop ...
3
votes
1answer
616 views

Very stiff front derailleur

My girlfriend has been having problems with her front shifter/derailleur since she got her bike. For some reason, moving the chain from the middle ring to the big ring at the front, is very stiff. ...
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2answers
328 views

Front derailleur cable suddenly very slack (no shifting), not sure what's caused it

I last rode the bike on Sunday. Throughout the ride I noticed the front shifter (grip friction shift, Shimano) was feeling "looser" than normal (hard to describe, it didn't feel "right" and seemed to ...
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5answers
769 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 ...
2
votes
1answer
96 views

Derailleur out of alignment after cable snapped

The front derailleur cable snapped on a friend's bike, she shifted it with her hand to a rideable position, and rode for a few weeks. She asked me for help replacing the cable, though when I replaced ...
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2answers
108 views

Would a IGH drive train last longer than a derailleur drive train?

Would a single sprocket + 8 speed chain + single chain wheel used in combination with a IGH last longer than a 10 speed cassette + 10 speed chain + 3x chain wheels? Image I have 2 bicycles. Bike 1 ...
2
votes
1answer
146 views

How do I figure out what crankset replacement will fit my derailleur?

I have a bike with a Shimano FC-M560 crankset in the front which I want to replace. I naively bought a Shimano FC-TY301 crankset, thinking that there's norms and that 3-speed cranksets are more or ...
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votes
2answers
1k views

Test drive of bike derailed chain easily … bad sign or nothing?

I tested a bike at a bike shop today. I rode it about 30 feet / 10 meters, turned left up a very shallow hill, hit the left (forward) dérailleur and the chain came off (went past innermost front ...