Questions tagged [derailleur]

Mechanism to move the chain from one sprocket to another.

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1answer
63 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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1answer
45 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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2answers
46 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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3answers
2k 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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1answer
143 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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0answers
192 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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7answers
6k views

Is it worth buying a high end light bike (8.5 kg) from 80' vs recent mid range bike (10kg)

I want to acquire my first road bike with a limited budget (~400€) but I'm faced with a lot of choices, found an old vitus 979 equiped with campagnolo chorus, a little rusty but really pretty and ...
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1answer
65 views

How to adjust rear derailleur indexing in a mix-and-match drivetrain in the easiest manner?

I have a touring bike where the drivetrain has been built not according to Shimano's instructions. For example, the shift lever is SL-BS64-8 Ultegra 8-speed bar end shifter that according to Shimano's ...
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2answers
155 views

What's the difference of SHIMANO SORA and SHIMANO DURA-ACE?

I have a bike front derailleur and rear derailleur are Shimano Sora, I don’t know if it can be replaced with Shimano DURA-ACE
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0answers
38 views

Front Derailleur / Gears not working [duplicate]

When I push the lever to change up the chainrings, I physically can't push it as it is like something is making it stuck, so I tried loosening the cable but had to do this so much that when I pushed ...
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2answers
348 views

I want to covert my bike from a 7 to 9 speed. I have a Shimano 600 derailleur. Will this work or what would you advise as affordable upgrade?

I want to covert my 7 speed to 9. Currently I have a Shimano 600 derailleur. What parts do I need to make this work?
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0answers
93 views

Rear Derailleur Noises

When I pedal on my bike there is a loud noise that increases as I go into easier gears on the cassette and in the easiest gear I can see the chain catching on the derailleur jockey wheels, why is this?...
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1answer
92 views

If my max cog is 50t and I got a 52t cog

Hello I just bought a ltwoo groupset on ebay because I want to go cheap for my first ride since I'm not sure if I will be riding a lot. I went on the ltwoo website later on and found on that their max ...
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1answer
113 views

Upgrading gearing help, currently running a 1x9 with a 30t crankset and 11/36t cassette. Can I upgrade to a 11-42t cassette?

I have a 1x9 that I really dislike and want to upgrade. I was told to get a "Shimano Deore FC-M625 Double 2x10 Speed MTB Bike Crankset 38/24T" to upgrade my 1x. I additionally caught a ...
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1answer
83 views

Should I Upgrade my MTB Rear Derailleur? (After Crash)

I mashed my 8 speed Shimano Acera rear derailleur in a crash over the weekend and need to get it replaced. Is it worth spending a little extra money and installing a slightly higher-end derailleur, ...
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1answer
111 views

Will a shimano acera rear derailleur work with a shimano altus cassete?

Got sick of breaking rear axles. Im going to convert to a freehub. Currently i have a shimano acera 9 speed rear derailleur. I found a shimano altus cassete which has a huge 36 tooth sprocket which is ...
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2answers
761 views

Rear derailleur moves forward when pedalling stops

Can you please help me to resolve the issue I am having? When I stop pedaling rear derailleur moves forward by inertia. This happen almost every time i stop pedaling and start coasting. I have a video ...
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1answer
77 views

My bike is not shifting to the proper gear

So I have a Shimano derailleur and it shifts up decent only problem is it does not shift to the gear it's supposed to shift to. On my bars it will say I'm in gear 5 for example but the back of my bike ...
1
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1answer
90 views

Which downtube friction shifters work with 2021 Campagnolo 11-speed cassettes, and how well?

Another question from a few years ago asks about Shimano 11-speed derailleurs; I have a related question about current (2021) Campagnolo equipment - I'd like to understand what downtube (friction) ...
3
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2answers
228 views

What kind of Rear derailleur do i have and what RD should I buy as a replacement?

I have an old mountain bike (21 speed) and I'm not sure what kind of rear derailleur i have. So far the performance is still okay but I was planning to replace it with my spare RD (SunRun Index) but ...
0
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1answer
73 views

Is my bike safe to use if cogs and crank is not that aligned?

Hey guys is it fine if my freewheel bike which is single speed is not that straight with its chain line, because my cogs and crank arent that straight but it is also not that far, im thinking if it is ...
6
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2answers
295 views

What are the long-term effect of riding with a chain that's too short?

I bought my bike late November 2017, and have been riding it with the same chain ever since. I've only done very light riding with the longest rides I've ever done amounting to 60km. Last week, I took ...
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0answers
76 views

SRAM Yaw Front Derailleurs

Can anybody help me with any tips on fine-tuning the adjustments on this derailleur (Force 22)? The positioning as far as I can tell is good, I can stick a penny between the teeth of the big ring and ...
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1answer
69 views

Gears slipping when back peddaling

So i was out on my bike racing this weekend and i had a pretty fun time but on one of my practice runs my chain fell off so i quickly got off and put it back on and worked perfectly fine from there. ...
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2answers
84 views

Can no longer shift to lowest gear

I recently worked on my derailleur a bit to fix some issues in high gears, however, now I can no longer shift down to my lowest in the cassette when in either crankset. I have tried the L screw at ...
1
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1answer
62 views

Front derailleur replacement

I'm not a pro cycler and I bought this Schwinn hybrid bike at a local shop, the front derailleur is not working properly and it seems very cheap and I'd like to change it for something more durable. ...
0
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1answer
83 views

Adding a derallieur hanger extender

So I have bought a bike but the easiest gear on the cassette is a 30 tooth and the derailleur is a short cage derailleur, the chain keeps falling off this gear and back to the next easiest gear, is ...
4
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4answers
982 views

Can my belt drive frame be converted to a derailleur setup?

I want to know whether my frame is compatible with any kind of derailleur hanger, as I want to install standard gears. Due to my Nexus 8 speed hub being really quite uncomfortable and faulty since ...
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2answers
122 views

Claris 2400 rear derailleur paint touch up

I was planning to do a touch up paint for my 2400 claris rear derailleur. Does anybody have an idea on what palette of paint closely resembles this particular rear derailleur?
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2answers
177 views

Chain "jumping" every few crank rotations

After a few pedal-strokes the rear derailleur completely gives out and the pedals drop to catch up. After much googling it says the most common thing is rear derailleur adjustment is needed, so I have ...
4
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2answers
399 views

Chain hitting front derailleur cage with H limit screw fully loosened

I followed the Park Tools guide to set up my gears. The rear derailleur was a success but I can't manage to adjust the front derailleur so that the chain stops grinding on the guard. There's no more ...
4
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2answers
160 views

What will be the easiest/cheapest way to get lower gearings on my "new to me" road bike?

I've recently become the proud new owner of a lovely late 90's steel road bike with some not so lovely "old school" gearing (53/39 chainrings and 11-25 8 speed cassette). As someone who both ...
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1answer
105 views

Wahoo KICKR Core Smart Turbo Trainer and Giant CONTEND 1 2017 - Cassette options

I would like know which Cassette should I get for the Wahoo KICKR Core Smart Turbo Trainer I own this cycle: Giant CONTEND 1 2017 - https://www.giant-bicycles.com/gb/contend-1-2017 It has a Rear ...
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2answers
186 views

8-speed MICROSHIFT shifters and ultegra RD-R8000-SS derailleur

I have Decathlon B'Twin Triban 500 with 8-speed MICROSHIFT shifters in the back. I am in the process of turning this commuting bike into my gravel bike. I already added new wheels and 35mm tires, ...
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5answers
2k views

I failed to replace my chain at the proper interval. Will I have to replace my whole drivetrain?

My bicycle is a 2012 Specialized Secteur. It has 6000 miles (10000 km), and I have never replaced the chain. I recently began noticing that the chain always seems out of alignment with the rear ...
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3answers
111 views

GT aggressor 1 frame from 2004/2005 derailleur [closed]

It's a 2004 or 2005 GT aggressor 1. I have looked but can not find the answer. Which derailleur do I need?
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2answers
110 views

Will a 3x10 or 3x9 front derailleur work on a 6/7 speed chain?

Will a 3x10 or 3x9 front derailleur work on a 6/7 speed chain? Can't seem to find a good MTB front derailleur for 6/7 speed chain. Tourneys won't do it for me
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0answers
28 views

Broken Rear mech inner plate

My chain got caught in the guide plate and broke the encircled part of the rear mech (See photo) I'm using Shimano GRX 810 Rear derailleur. There are no observable misalignment. Question, is it safe ...
1
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1answer
164 views

Will Shimano Acera 8 speed derailleur work on 6 speed freewheel?

I want to get a higher quality rear derailleur from the Tourney which I have right now(it broke). I want a Shimano Acera RD-M360-SGS. The problem is that its 8 speed. Will it work on my 6 speed ...
5
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3answers
570 views

Barrel Adjuster Strategy - What's the best way to use barrel adjusters?

I was taught that barrel adjusters are to be used as an on-the-road way to adjust brakes or derailleurs. I think the exact quote was "Leave the barrel adjuster for the customer to use on the road&...
3
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1answer
391 views

Chain skipping on upper pulley of rear derailleur

Background: I have a full suspension mountain bike with SRAM GX Eagle components. I snapped my chain recently, and replaced it with a new one of the same model. Made sure to size it the same as the ...
4
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3answers
823 views

Can I fit a compact cassette with a long cage derailleur?

my bike currently has a combination of 50X34 crankset and an 11x32 cassette and it looks like my rear derailleur is a long cage. I'm buying new wheels and I want to take the opportunity to try and buy ...
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2answers
96 views

Using a cassette and derailleur with different sprocket/cog specifications

I am trying to make a cheaper (500ish) bike work with a Tacx Flux (2018 version). According to their website, the Tacx Flux only supports 8-11 speed cassettes, but my bike has a 7 speed freewheel (14-...
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2answers
761 views

Rear derailleur max capacity exceeded?

My MTB is a Lapierre X-Flow 512 2012. It has a Shimano RD-M980-SGS 10v rear derailleur which has a total capacity of 41t (see official specs). But it comes with a 11-36 cassette and a 24-42 crankset (...
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3answers
836 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
233 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
703 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 ...
2
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2answers
171 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
184 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
158 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. ...

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