Questions tagged [derailleur]

Mechanism to move the chain from one sprocket to another.

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Trek Marlin 7 (2022), Gear Shifting

I have a issue with my Marlin 7 (2022). It has a Shimano Deore M5120 rear derailleur. When the bike is on the bike stand the bike shifts perfectly. When I'm riding the bike the bike shifts fine until ...
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13 views

SRAM Rival eTap Rear Derailleur Cannot Shift All The Way Inboard

I have set up a number of eTAP SRAM rear Derailleurs and never had an issue. I set up a 44 tooth XPLR cassette with the XPLR Rival eTAP rear Derailleur. I got the chain sized, on the pulleys and ...
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4 votes
2 answers
326 views

combining an index shifter with a friction rear derailleur

is it possible to combine an indexed shifter with old friction derailleurs? As the cable is moved by the shifter, I understand that derailleurs should work by default and by moved with mm that the ...
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5 votes
0 answers
91 views

Problem with shifting up from small-small

I have a problem when trying to shift from the smallest sprocket on the rear casette to the bigger one when on the small chainring. It tries but it seems there isn't enough tension on the cable. If I &...
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1 answer
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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 ...
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2 votes
1 answer
71 views

Gears not shifting properly

I've got an issue that I've been trying to fix for more than a week. I broke my derailleur+hanger because I changed my cassette from a 11-28 to a 11-32 with a short cage Dura Ace 10s 7900. I replaced ...
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12 votes
6 answers
2k views

Ultegra RD-R8000 derailleur chewing up shifter cable - WTH?

I have an Ultegra RD-R8000 (GS cage) that has chewed up multiple shifter cables (Dura Ace and Jagwire) at the cable bolt. Seems that when in a high gear (11t chainring) the cable bends over the clamp ...
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3 answers
265 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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2 answers
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GRX800 position

I got a bike from chainreaction with GRX groupset on it. The rear derailleur is not aligned with the cassette. I think the hanger got bent during delivery, but the guy at the local shop says it's fine....
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4 votes
1 answer
180 views

My bike's gears won't shift properly or at all

Firstly, sorry if this has been asked before but I don't know much about bikes. I bought my bike from big w (fairly cheap beginners bike, but I am happy with it). It has two shifters, one on the left (...
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3 votes
1 answer
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Compatibility of 9-Speed Alivio Rear Shifter with a 9-Speed Deore Rear Derailleur

Is a 9-speed Alivio rear shifter compatible with a 9-speed Deore rear derailleur?
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4 votes
1 answer
140 views

Gravel derailleur advice

I have a gravel bike with the following 1X set up: FSA Omega Megaexo crank, 40T Sunrace 11-46 CSMS8 cassette Sram Apex1 11 spd derailleur Sram Apex 11 speed Double-Tap shifter I would like to change ...
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5 votes
3 answers
445 views

Improving the Efficiency of a Derailleur: Enlarging the Cassette Sprockets to reduce Friction

For reasons that I have not yet understood, the smallest sprockets with only 11 teeth have prevailed in derailleur cassettes of road bikes, which leads to a very strong deflection of the individual ...
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  • 151
4 votes
1 answer
87 views

Can't index gears with both chainrings

I have a 2011 Lapierre sensium 3 which I bought new in 2012. It came with 2X10 Ultegra gears which have never really indexed well, needing 2 clicks to change direction. My bikes with 105s work ...
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0 answers
48 views

Shifting issue on road bike

Got given a BH Zapphire road bike, in good condition but rear gear cable was snapped. I have fitted a new cable but now got an issue. The gear will move up to the larger cogs fine, but then when I try ...
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4 votes
1 answer
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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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0 answers
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Gear up lever will not move

I just got a new bike and unfortunately fell off it on the first ride, now the lever to change gear for my derailleur Mezzu Microshift is stuck in the position it would be if you had upped a gear ...
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3 votes
1 answer
168 views

Compatible front derailleur FD 4403 to FD 4503

Can I replace an FD 4403 3x9 with a FD 4503 3x9?
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6 votes
3 answers
2k views

Did I just buy an inverted front derailleur?

I have a mtb and my derailleur is old, now that I removed it I see that is in tip top condition(I try to take very good care of my bike) but as I already had the new one, I decided to just go with the ...
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2 votes
2 answers
100 views

Is it normal that my front derauiller and chain rub when I take my bike off my trainer?

I have a direct drive trainer and the directions say when taking the bike on and off the bike to take shift the bike into the hardest gearing (cross chaining even). This is the smallest cog in the ...
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1 answer
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New(ish) bike chain slack when backpedalling or cruising

I bought a bike from Target a week ago (Yes, I get it, cheap department store bikes are terrible). It's been working okay until I tried using it again today after a 3 day break. In that time period, ...
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2 answers
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Shimano Deore 11s derailleur and shifter with a 9s casette 11-46t (Sunrace)

I was questioning if can I fit an 11s Deore derailleur with shifters to a 9s 11-46t Sunrace cassette? I've got the doubt because I need to change my derailleur to one that can tolerate up to 46t ...
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3 votes
1 answer
253 views

Correct gear cable for vintage Shimano 600 derailleur?

I'm restoring an old bicycle and need gear cables for this derailleur (see photo). I found some specs here https://velobase.com/ViewComponent.aspx?ID=9422ABE1-A7B3-4622-9DAB-EF4DEC646ED5 but it doesn'...
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  • 115
2 votes
1 answer
86 views

Shimano Tiagra 10 speed drive chain parts compatibility issues [closed]

I was working on a 10 speed bike yesterday. It needed a new drivechain, so having purchased a Shimano Tiara CS-HG500 11-32T cassette and a SRAM PC1051 10 Speed chain, I tried to set up accurate rear ...
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3 votes
1 answer
143 views

Chainring spacing of cranksets universal?

My understanding is that 7/8/9/10 chainring spacing is the same. I have a Shimano Claris double/2x8-speed that I want to upgrade to a triple front, but using a 10-speed crank. I’ve acquired a Shimano ...
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4 votes
1 answer
156 views

Front derailleur cable touching frame?

Installing gears on my bike on my own for the first time. I pulled the front derailleur gear cable through an intended hole in the frame like so: So everything should be fine. However, looking under ...
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7 votes
6 answers
218 views

Is it common to combine internal gear hubs and derailleurs?

This is a pic of my 1952 hub dated Raliegh with a sturmy archer coupled with a 3 gear derailleur. Was this a common thing to do? This works flawlessly and I like the vintage Frankenstein parts. I got ...
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7 votes
3 answers
565 views

Are there any electronic shifters that decide front/back for you?

Are there any road bike electronic shifting systems out there currently that only have a single up and down shifter lever and use a computer to make the decision of whether to shift on the rear ...
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1 vote
1 answer
94 views

Front Derailleur Won't shift down

I had an issue with my from derailleur and took it into a bike shop where the guy told me nothing was wrong with it even though I was noticing some noise coming from it. I then tried velofix the bike ...
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7 votes
3 answers
1k views

Is it common for derailleur limit screws to drift over time?

I've just been adjusting my front derailleur, and found that the upper limit screw was severely impeding my shifting. My trouble getting into the big ring has been steadily growing, so it seems like ...
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1 vote
2 answers
70 views

Rear derailleur shifting backlash

I have a problem with my rear derailleur, which I cannot find a solution to. The shifter has some kind of backlash, when I shift up it all goes perfect, same as if I go down. But when I try to turn ...
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2 votes
2 answers
88 views

installing 1x11 gearset on a 1986 Bianchi Strada

I have a 1986/7 Bianchi Strada it is a 2x5 gearset, a SuginoVP 110 crankset and shimano derailers. I want to convert it to be more like a gravel bike so change it to 1x11 or 1x9 gearset with 11-36 ...
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1 vote
0 answers
64 views

Cable rubs on mountain bike derailleur

the hole were the cable goes through does not have a guide. The cable rubs against the aluminum housing. What is suppose to go in there?
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5 votes
5 answers
702 views

Can 2x12 and 3x11 drivetrains have (practical) range greater than 700%?

I’ve come across 2x12 and 3x11 triple cranksets. Can these systems necessarily provide more range than 2x11 and 3x10 @ > 700%? Edit: My question is really what can practically be accomplished, with ...
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0 votes
2 answers
183 views

Shifting derailleur without pedaling?

I know shifting gears without pedaling would potentially damage your bike, but would shifting front derailleur while stationary damage anything?
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3 votes
3 answers
457 views

Can I use a 2x10 rear derailleur with 3 front rings?

I am looking at something like SRAM GX 2x10 MTB Rear Derailleur. Will it work with 3x MTB?
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4 votes
1 answer
98 views

Can you pair a 105 10 Speed Cassette with a 10 Speed Tiagra Derailleur?

I was looking for a 10 Speed Tiagra Casette but was not able to find one. A good deal for a 105 10-Speed Casette caught my eye, so I wanted to ask if it would be possible to pair a 10-Speed Derailleur ...
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  • 131
5 votes
2 answers
451 views

Is a shifter from Campagnolo compatible with a derailleur from Shimano?

The Campagnolo Veloce is a ten speed shifter and the Shimano is also ten speed derailleur, so can a shifter be compatible with another brand derailleur, specifically Campagnolo and Shimano?
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  • 131
1 vote
1 answer
53 views

Any issues with trying to go 2x10 with 44/22 rings?

I figure I would need a triple derailleur for the cage height, but IDK if the ramps and pins would be sufficient for that kind of gap. The 44t chainrings are designed for 3x10. Also, there might be a ...
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6 votes
2 answers
544 views

I lost one of the rear rear derailleur hanger screws, what could be the cause, and is it safe to ride before I replace the bolt

I noticed that I lost one of the two small screws on the rear derailleur hanger attaching the hanger to the frame on my road bike. Might there be something wrong with my shifting that caused that? ...
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3 votes
3 answers
599 views

Internal hub shifters vs derailleur shifters indexing?

What is the indexing like on the popular internally-geared hubs (shimano nexus and sram i-motion)? Can one use a 3-speed front shimano derailleur shifter (e.g. acera) for a 3-speed shimano nexus hub? ...
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  • 145
1 vote
1 answer
129 views

What to replace a rear Shimano RSX derailleur with?

I have a Shimano RSX 8 speed rear derailleur and on a 20year old bike. It starts to play up and I would like to replace it. Since the RSX-Series is not produced any more, I was wondering with which ...
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0 votes
2 answers
96 views

Derailleur Hanger Replacement

I have just replaced my derailleur hanger but it wont tighten properly the back keeps spinning so it never gets fully tight? Is there a special tool I need or is it meant to be like this?
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1 answer
231 views

Upgrading broken Shimano Claris derailleur with Shimano Tiagra (Kona Rove AL 650 2021)

I purchased Kona Rova AL 650 last year. I am riding frequently and probably put a lot of wear on the bike. As a result I broke the Rear Derailleur Shimano Claris and Hanger (picture attached below). ...
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1 vote
1 answer
182 views

9 speed Shimano Deore derailleur compatibility

Will a 9 speed Shimano Deore derailleur be compatible with my 13-32 tooth freewheel?
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0 votes
1 answer
98 views

Can I replace a broken Alivio M410 8speed rear derailleur with Acera T3000 9speed?

Damage to a bike resulted in a broken hanger and a damaged derailleur. I can't get hold of a like-for-like replacement derailleur (Alivio M410). Have seen others state that a 9speed derailleur will ...
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  • 3
0 votes
2 answers
194 views

Will a Shimano RD M5120 rear mech work with 10 speed 105 road shifters?

I bought a 1x10 speed Ridley cyclocross bike with 105 road shifters and a 105 rear mech. The bike shifts fine but I would prefer a rear mech with a clutch. I bought a Shimano M5120 rear mech that said ...
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12 votes
3 answers
3k views

Why do I constantly have to re-index gears?

I've got a road bike with a high end 11 speed groupset that is about 3 years / 30,000 km old. Chain and cassette have both been replaced recently (i.e. 500 km ago). What I'm experiencing is a constant ...
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2 votes
1 answer
264 views

Shimano RD-R7000 cable cut into thread?

That gap/cut in the hollow screw of the cable mount is not supposed to be there, right? If so, is this a typical defect? The hollow screw is pressed into the derailleur body and not replaceable, so ...
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7 votes
0 answers
290 views

Why did Shimano change their rear derailleur design going from a torsion spring to a tension spring inside the parallelogram?

The older Shimano rear derailleurs (pre 7700) use a torsion spring inside the parallelogram. But with the release of the 7700 group they switched to a tension spring which they continued using ever ...
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