Questions tagged [derailleur]

Mechanism to move the chain from one sprocket to another.

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5
votes
2answers
630 views

Rear derailleur at limit, chain still rubbing

I gave my bike a thorough service recently by pulling it apart and cleaning/re-greasing everything. Now everything is back together and I just can't get the rear derailleur to work properly. The H ...
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1answer
44 views

What thread does the b-screw on a shimano rd-6400/6401 have?

What thread does the b-screw on a shimano rd-6401 have? I need to recut the thread but am not entirely sure if it's an M4 fine pitch or something else.
6
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3answers
490 views

Shifting direction is different for front and rear shifters

I have been riding singlespeed and 1x setups for decades. The last time I had a front derailleur was over 30 years ago, and the shifter was on the downtube then, and I don’t have any memory of how it ...
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2answers
66 views

Can an 8 speed chain fit inside an 11 speed Shimano 105 (RD-R7000 ) rear derailleur?

I am using downtube friction shifters, I know my shifter's pull of 28.5 mm multiplied by the Shimano 105 RD's pull ratio of 1.4 gives me 40mm of travel, enough to traverse the entire width of my 35 ...
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2answers
96 views

Explanation on the lineup of SRAM Derailleurs

@thelawnet has given a very descriptive answer to my previous question which seeks an Explanation on the lineup of Shimano Derailleurs. I am pretty sure that there are people who confuse about the ...
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2answers
100 views

How to increase the durability of gear-shifters

I am not a professional cyclist and may not even be a good rider but it seems like I tend to break my shifters way too often. I initially had a SRAM-X4 8x3 Shifters which ripped apart in an accident. ...
3
votes
2answers
337 views

Imprecise shifting on a Shimano 9 speed set

Edit: Jeff’s answer - replace the cable housing - fixed the problem. I made sure the highest and lowest alignments were correct, that the cogs lined up with the gears, and then replaced all cable ...
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2answers
46 views

Shift lever and rear derailleur compatibility

I have got MTB with Shimano RD-M410 Alivio Rear Derailleur 8 speed. It has brake/shift lever for it model ST-EF50-8R. I would like to move to disc brakes and therefore want to change to ST-EF505 ...
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2answers
65 views

8 speed flat bar set up with Dura Ace RD-7700 or new Claris RD-2400

I'm buying a new drivetrain (cranks, cassette, chain) for my flatbar commuter that was mostly built of parts. I currently have a Dura Ace 7700 short cage derailleur on it, I got it from a friend a ...
7
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2answers
736 views

9-Speed Ultegra (6500) with Mountainbike Derailleur

I want to go bikepacking with my old road bike. The road bike has a standard crankset (53/39, double not triple), and an 11-28 cassette. The groupset is Shimano Ultegra 6500. Because I want to do some ...
1
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1answer
84 views

Different Derailleurs with different shifters

I want to install hydraulic disk brakes on my bicycle, however I also need shifters as shifters and brakes are integrated on my bike. I have 3 speed tourney FD TY 500 triple in front and Altus MD310 ...
4
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1answer
51 views

SRAM Red eTap on Ultegra bike

I own a 2018 Cannondale SuperSix EVO Ultegra. When I bought the bike I upgraded the crank set to the Cannondale Spider 52/36. I recently decided to go to SRAM Res eTap. During my install the FD is at ...
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3answers
78 views

How to check and ensure parallelism of front derailer and chainrings?

Various instructions of front derailers with clamp want me to ensure that the derailer cage is parallel to the chainrings. What is the preferred way to do this? Since the derailer cage has quite a ...
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0answers
49 views

Using 11-36t 9 speed derailleur with 11-40t 9 speed cassette

So I've got the shimano altus rd-m2000 and it says that it only supports 11-36t. However, I've seen people on forums say that it's possible with this derailleur. Even it I was wondering if with a ...
3
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3answers
74 views

Shift lever tight when cable clamped in derailleur, adjustments seem futile

I have a 2020 Giant Trance 2 I purchased new at the beginning of June 2020. Recently I had to replace my shifter cable (I broke a ferrule and the cable was fraying and very short, so I figured the ...
1
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2answers
110 views

Standard to compact swap

I am looking to swap from a Shimano 105 standard 53-39 crankset to a 50-34 compact crankset. My question is: will I need to adjust the height of the derailleur when changing to the new crankset? And ...
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0answers
54 views

Cassette noise in gears 1,2 and 3 on newer bike

I was out riding when I broke my chain (too high of a gear and too steep of a gradient). Got chain replaced and now my cassette gear 1 (easiest gear) takes more power to pedal than gear 2 and when I ...
3
votes
2answers
423 views

No movement between two lowest shifter settings

I bought a new derailleur, cassette, and hanger after a decent wreck. Shimano 105 set, 11 speed, 11-34 cassette. I've tried adjusting the shift cable barrel, H/L limit screws, and the screw that sets ...
3
votes
2answers
181 views

Can someone help me identify this old Shimano derailleur?

I want to poke around online a bit and see if I can find anything out about it. It's a long cage, on an old 18 speed Univega MTB. Thanks.
1
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2answers
62 views

Which shifters are compatible with dura ace 740x?

I've read that Shimano updated the cable pull ratio on their other series early on but not for Dura-Ace until 1997 with the 7700. Which downtube shifting levers are compatible with their 7400/7401/...
1
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1answer
91 views

Bicycle buying suggestions please! [closed]

As of yet, like most other Indians, I've only ridden a single speed, which was brought for 4000 rupees, about 13 years ago.. Yes, it's still in use! My budget now is strictly 13000 INR for the bicycle ...
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1answer
61 views

Chain catching after derailleur change

I am trying to figure out why my chain is catching with each revolution. You can see it in this short video [
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1answer
112 views

Can I use a 3x10 or 2x11 front derailleur on a 3x11 drivetrain?

I recently started changing the drivetrain on my Trail 6 (2020) and I wanted to jump to 3x11 from the 2x9 mixed Altus/Alivio it came as stock. My mistake was not paying attention to the type of pull ...
2
votes
1answer
102 views

Can a 9x3 front derailleur fit on a 7x3 configuration?

I own a budget MTB (Decathlon Rockrider ST 100), with 3x7 speed and I want to upgrade the cheap derailleurs to something more reliable (Such as Shimano Deore). I already changed the brakes and ...
5
votes
1answer
178 views

Shouldn't use two extreme gears?

I purchased a new Mountain bike a month ago and noticed after a week or so the gears were starting to slip, this was expected because of stretch in cables and wear in etc so I took it in for a tune up ...
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0answers
110 views

Bent shimano 12 speed slx m7100 rear derailleur. Cause?

Rear derailleur (mileage: 600 miles) simply bent during my ride (I didn't crash and didn't notice something hitting rear mech). Bend is significant. It seems to me that the derailleur cage is bent, ...
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0answers
32 views

Chain length with new derailleur

I bought a 8spd chain and am putting it on a 7spd bikes. I thought I could use either a seven speed or eight speed chain. But it looks like the chain is way too long should I take out some links if ...
0
votes
1answer
67 views

Upgrading my bike

I'm very new to the world of bicycles, so apologies in advance. I have a second hand road bike built (by a professional) with spare parts of different components. The rear derailleur is Shimano Acera, ...
0
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1answer
69 views

Identify a replacement shimano rear derailleur

I have managed to bend the rear derailleur on my gt palomar, the gear was not clicking through so I moved it through the gears set off and heard it crunch. The whole arm is bent. It appears to be a ...
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0answers
40 views

Ribble CGR Ti - Replacement Gear Hanger

The gear hanger on my bike broke about 3 weeks ago. This is a sacrificial part, but Ribble are out of stock and seem to have no idea when this critical part will be in stock again. I have looked on ...
0
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1answer
58 views

Front derailleur wont shift to small gear

I have removed the cable and loosened the range adjustment screws to take them out of the picture. Spring on front derailleur now pushes the cage all way to left. Looks correct so chain should move to ...
2
votes
1answer
61 views

Can I change my derailleur without changing my shifter?

I have Shimano V-Brake 8-speed shifters on my bike. These have the brakes and the shifter in one component. I'd like to change my derailleur can I put in a newer 8 speed Shimano derailleur that will ...
0
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0answers
39 views

My shifter shifts only one gear up and down

I just was on a ride and all of a sudden I could only shift one gear up and down (in this case it was the 10th and 11th respectively the 21th and 22th). If I try to move the shifter further up (so up ...
0
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1answer
143 views

Direct mount vs. hanger derailleur

Currently repairing a bike that I got off the road for free years ago. Around three years ago, a stuck link caused a chain jam while pedaling at high speed, causing the metal around the b-knuckle on ...
3
votes
2answers
507 views

Can I use Shimano 105 rear derailleur from 11-speed bike with 10-speed Tiagra shifters?

I have a 10-speed 2013 Specialized Allez Elite with Tiagra componentry (and an 11/28 105 cassette) and would like to install my old Shimano 105 rear derailleur in the back to replace the Tiagra one. ...
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1answer
75 views

How do I determine the “length” of this derailleur?

What length is this derailleur please. Cannot determine if its a short, medium or long.
0
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1answer
69 views

I need a new bike derailleur, which one?

I have a fairly old Specialized Hardrock Sport. I want to get new derailleurs. Is there a specific one I should get. I'm not sure the one now is the original.
2
votes
1answer
156 views

Can I reorient my dérailleur so the top jockey doesn't hit the cassette?

I was running a RD-M7000 dérailleur on my Scott E-Genius 730 and I recently received some good advice here that the Deore RD-M6000 is a drop-in replacement. I have now purchased and fitted that, but ...
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0answers
28 views

What type of rear derailer can I use [duplicate]

I bought a used frame without a derailer. What type will I be able to use? I would like to switch to trigger shifters and a good quality derailer. See photos.enter image description here
3
votes
3answers
229 views

Is my Shimano Deore SLX dérailleur a medium or long cage?

I have a Scott E-Genius 730 Plus and would like to replace the rear dérailleur (the probable cause of difficulties described in my last question). It's a Shimano Deore SLX Dyna-sys unit, it's for a 10-...
2
votes
2answers
325 views

Bottom jockey wheel on rear derailleur keeps skipping chain

Basically the angle between the bottom and top wheels is too great causing the chain to skip to the outside of the bottom wheel under force. If I use the higher adjustment screw on the shimano ...
0
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1answer
116 views

Why does my Shimano Deore SLX dérailleur not rotate into the expected (vertical) position?

I have a Scott E-Genius 730 Plus mountain bike (around three years old). I had a chain snap recently, so I have replaced the rear 10-speed cassette, and am now trying to route a new chain correctly. I ...
2
votes
1answer
46 views

Rear derailluer broken bolt

I am trying to figure out the right part to replace this bolt that broke. It went through the rear frame of bike into derailleur to a shimano dyna sys II unit. I believe it is a hanger bolt but the ...
3
votes
1answer
77 views

Chain pops off guide pulley when pedaling

I re-installed new tires for the first time yesterday. Now I'm having problems with my rear derailleur. The chain keeps popping off the derailleur guide pulley when I pedal forward. I can re-seat it ...
2
votes
2answers
106 views

Is my derailleur broken?

This is a Peugeot UO 8 from the 1970s. My problem is recently when moving to the largest gear the chain slips and eventually it will come off the front crank. When researching the problem it seems ...
1
vote
1answer
266 views

Sprocket touching the biggest cog no matter B screw…how do I fix?

My Shimano rear derailleur was destroyed, for some reason got into the rear wheel, so I had to buy a new one. Hanger was a little misaligned but I think I fixed it. I bought the new derailleur, ...
0
votes
1answer
43 views

Derailleur setting

I have a 7 speed bike. The 5-7 gears don't move the derailleur. It stays at the smallest cog. The derailleur doesn't move until I shift to gear 4. When I get to gear 1, the derailleur is at the 3rd ...
3
votes
2answers
729 views

Is it possible to move my rear derailleur so that it does not touch the chain?

My chain is touching part of the rear derailleur. Is it possible to move the derailleur so the chain does not touch it?
3
votes
2answers
380 views

Why is low sprocket minimum 28t for a Shimano 105-GS?

I have a Shimano 105 R7000 GS (medium cage) rear derailleur and would like to mount a 12-25 cassette. According to its specs, this should not be possible. I am just wondering: why not? A GS-cage will ...
1
vote
1answer
58 views

Broken front derailleur 7400 Dura Ace

The chain came off a couple of times while I was riding yesterday and when I tried to put the chain back, the small screw came off from front derailleur. I think maybe that’s a thing to attach the ...

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