Questions tagged [derailleur]

Mechanism to move the chain from one sprocket to another.

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2 votes
1 answer
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Modify/hack rear derailleur cage size

I've listened that it is possible to modify the cage size of a rear derailleur. For instance reducing a long (SGS) to a medium (GS) or short (SS) cage size. Is it possible on all brands? Just shimano? ...
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2 votes
1 answer
50 views

Front derailleur struggles to shift to smallest chainring, when it eventually shifts, the chain goes too far and falls out

So i am trying to adjust the front derailleur limit screws and cable tension, but i can't get it to shift smoothly. It is struggling to shift the chain to the smallest ring, especially under torque, ...
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0 answers
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I have a Shimano 515 7 speed derailleur that just finds the lower 4 gears. Can the 2 screws on the derailleur be used to fix my problem?

I have a Shimano 515 7 speed derailleur that only finds the lower 4 gears. How can the 2 screws on the derailleur be used to fix my problem?
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3 votes
1 answer
98 views

Derailleur not moving even when manually pressed

my bicycle is not shifting. The shifter is working fine (cable tense up and down with it). I think the problem has to do with the derailleur. I have seen videos that manually press it to diagnose ...
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1 answer
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How to mount Sram X01 pulley wheel spacers

Ive ordered a new set of pulley wheels for my Sram X01 derailleur but I do not know where to mount which spacer. The set came with 3 "deep" and 1 "flat" spacer as seen in the ...
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4 votes
1 answer
190 views

What is the best way to increase gear inches on an old bike?

I only recently got into bicycling and without knowing anything, I bought a bike from a local used bike distributor. Here's what I've learned about the bike. The frame, seat, and handles are original ...
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1 vote
1 answer
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Are there special heavy-duty front derailleurs for recumbent trikes or recumbent bicycles?

I have a "normal" short wheelbase highracer recumbent bicycle (Radius Hornet I) for about 20 years now, so I'm generally used to recumbent-specific things. But since recently I also own an ...
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1 vote
2 answers
51 views

What driver body and disk brake compatibility is important for setting up a rear wheel?

I'm looking at a wheelset which comes with either a Shimano or XDR driver body option. So I assume that has to be compatible with the cassette, but does the cassette also have to be compatible with ...
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Aligning a Shimano direct mount derailleur

I was suffering bad shifting and skips and my derailleur appeared to be bent slightly inwards, so I thought I’d check it with a Park DAG 2.2 I already owned (for a previous bike). Instead of the ...
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3 votes
0 answers
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Can't find derailleur hanger for an old Nakamura

I tried local parts shops and tried the internet and still can't find the right hanger, And I no longer have the old broken one. I can't even find the bike on the internet, The only photo I found was ...
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4 votes
1 answer
238 views

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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0 votes
1 answer
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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
367 views

combining technologies and speeds: shifter and rear derailleur (index, friction)

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
1 answer
141 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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3 votes
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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