Questions tagged [derailleur]
Mechanism to move the chain from one sprocket to another.
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What type of mount do i have?
Planning to buy a SRAM X.3 not sure what mount I have though. The model is a red and white Mongoose XR75 mtb.
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Which pulley is which on my Shimano STX RC derailleur?
I disassembled my rear derailleur to clean it; when I removed the sprockets they basically looked the same; both jet black and caked with all sorts of black grease-like-stuff. I figured they were the ...
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microshift 26 rear derailur won’t shift after adjusting at home
Okay so i broke my bike and had to buy new things, i bought a replacement rear derailur (same one as before) and after looking at multiple youtube videos it still won’t shift. I tried going all the ...
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Simultaneous clang, hesitation and drop when I pedal with any weight
Background: New chain, new bottom bracket, new front derailleur, new shifters, new brakes.
This is a cheap Walmart Mongoose that I'm trying to keep riding and upgraded some of the components recently, ...
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Derailleur clunks into 7
I have a Shimano 7speed. The shifter goes full range, but when putting it into 7, the derailleur clunks down in a stepwise fashion, especially with increased power applied.
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Is there such thing as an automatic transmission for bikes?
Has anyone ever designed or manufactured an automatic transmission (or automatic shifter?) for cycling?
I imagine such a device would automatically change the gearing to allow the rider to maintain ...
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Gear up-shift not smooth
When I am pedaling hard and shift to a larger sprocket, the shift is not smooth or sometimes doesn't happen at all. Sometimes even double up-shifts don't work. There is no problem shifting when I test ...
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I can hear the rear wheel spokes brushing on rear derailleur
I have relatively new Shimano Tiagra WH-RS100 700C wheels compatible with 8 to 11 speed, it has 11-32T eight speed cassette. The bike originally came with seven speed freewheel. Although I've changed ...
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Rear derailer missing and needing correct one, schwinn with numbers on bike in question..it is a newer model .maybe a trailways but not certain of mo
I have been gifted a schwinn that needs a rear derailer with numbers 365505 snxds 21h16996. Can you assist me in getting the correct derailer?
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Need Hanger Adapter for Acera Rear Derailleur for Hero Sprint rx2 bicycle frame
First I had the Tourney derailleur. Which is somehow destroyed, and I've lost it. I promptly bought an Acera online, expecting to upgrade. A lot has been spent. Here's the issue: I wasn't aware the ...
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SRAM Gx 10 sp detailleur rotates when bolt tigtened?
It seems to be part of the design of the derailleur? Before I had the X7 which stayed put. Unless I have a non compatable dropout for the Gx?
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Need to know compatible derailleur to my Shimano RD-M3000 Acera 9 Speed
It’s a 2019 Raleigh E-Bike Detour
I have two of these bikes and could not figure out why shifting to high gears would get no response on first click then jump 2 on the next click.
Going to low gears ...
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pedals only move bike at highest gear
Recently my bike will only move if I’m in the highest gear. I can pedal at lower gears but it will not move my bike forward at any reasonable speed and when I get up to even a very low speed the ...
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Theoretically, about weird but very interesting 3x9 setup? Some knowledge about gearing would be great :)
Is it possible to have a 3x9 setup -
Triple 42T ( 42-32-24 )
x 9s ( 11-13-16-20-24-28-32-36-42T )?
The main question is, what kind of 9 speed derailleur is compatible and how long chain need to be for ...
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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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Compatibility of Shimano Deore SLM570 shifters
My front derailleur is broken. The front derailleur is of the shimano group Nexave, which apparently they don't produce anymore. I am trying to find out which type I should buy that is compatible with ...
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Rear derailleur won't shift up from smallest cog to next smallest cog but then shifts ok
I have a 1x10 Deore setup and recently I have been having shifting problems when I am moving up from the smallest cog to the next cog. It won't shift to the 2nd cog but if I shift twice up to the 3rd ...
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Rear shifter cable wont stay in anything but the highest gear
I'm a beginner and I have just bought a Kona sutra, everything was going fine until yesterday when the rear shifter cable developed a problem. When I try to shift up into higher gears it just kicks me ...
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DEORE vs XT derralieus and other components
I've been told that XT is better than DEORE.
Is it only the weight is different or XT are better in other meaning ?
And some follow-up, if XT is better. Does a bike with a used XT is better than a new ...
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Crank arm rubs on front Deralier
I have a Giant Talon MTB.
I find when I select the largest chain ring at the front, the crank arm rubs on the derailleur.
I've managed to dial it out by using the barrel adjuster.
Now when the middle ...
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How to properly adjust rear derailleur for Wahoo Kickr?
I have a Merida Escultura 100 connected to a Wahoo Kickr (with the rear wheel removed, of course). I've ridden this combination for over a year and had the derailleur adjusted more or less so there ...
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Is it safe to move a di2 derailleur manually?
From my understanding, doing this will damage both the front and the rear derailleurs' servos and / or gears:
https://youtube.com/clip/UgkxQsBoKA0qG0Mfgwo435Xr6aLnD8TOTrRB
However, this is fine since ...
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Beginner breaks rear derailleur, what might have gone wrong?
I broke the rear derailleur on a borrowed bike. I'm trying to understand why.
Until two months ago I knew nothing about bicycles. I bought a worn down cheap second hand bike. It took me way more time ...
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Is my new M5100 rear derailleur bent, or are they not in line by design?
I just got a new M5100 rear derailleur and when I mounted it on the bike it seems like the cage is not inline. Is this by design or did I got faulty unit?
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The bike derailer will automatically drop to the lowest gear in the rear whenever my cadence slows
I have a REI Coop CTY 2.2 bicycle. Whenever I am biking and my cadence slows down, the bicycle derailer automatically (I am not shifting) to the lowest gear on the rear derailer. Any suggestions on ...
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What derailleur hanger is this and what is actually compatible and what needs changing?
Bought this bike second hand. Obviously these are not stock components here, the rear derailleur should not be direct mount. I can not seem to find the specifications for the hangar anywhere. Also I ...
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How to properly adjust front derailleur height when it can sway significantly once the clamp bolt is loosened up?
I'm trying to adjust derailleurs myself, for the first time .)
the model is DEORE XT
following the how-to
https://www.wikihow.com/Adjust-a-Shimano-Front-Derailleur
the very first step - adjusting its ...
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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 ...
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Nine speed derailleur on 10 speed cassette
Will combination work? I have 10 speed shifters, 10 speed chain, 10 speed cassette and all components are Shimano.
The reason I ask is because I am new to cycling and I am having trouble indexing my ...
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Shimano 11/42 cassette, 11 speed derailleur compatibility
Existing trek domane SL6 (2021) with ultegra 11speed mechanical gruppo
shifters r8020
fd r8000 with 2x 46/34
rd r8000 11spd 11/34
To get shorter gear inches, looking at changing to 11/42 ( or 11/46) ...
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Sram AXS derailleur does not shift
Have you encountered a problem where a rear AXS derailleur stops shifting? Any suggestions?
I bought a mint 2023 GX AXS derailleur on Marketplace, it worked for the first short test ride on a road but ...
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Chain with master link / quick connect link doesn't clear rear derailleur
Bought a chain with a master link (packaging said quick connect link), it looks just like this:
This bit however won't fit cleanly through my derailleur, it snags on the wall right as it goes onto ...
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Vintage derailleur identification
I have a vintage Shimano derailleur that I'm trying to identify, specifically to figure out which jockey wheel set is compatible as mine badly need replacing. The derailleur is marked "Shimano ...
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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' ...
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Order of setting up new shifting system
I'm getting close to being finished with my Trek 520 frame-up build (with custom drivetrain). The only thing that remains is cabling the front and rear derailleurs, setting the limit screws and ...
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Can I swap an SGS cage on a Shimano RD-M8100 having a GS cage?¹
It's been difficult to locate a new XTR M9100 or XT M8100 with the SGS (long) cage from the few reputable U.S. dealers I buy from where Shimano will honor their warranty. The GS cage versions are ...
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SRAM 1:1 shifter + Shimano 11 speed MTB RD
I'm planning my next bike build with an 11-50 cassette but I don't want more than 10 gears for personal preferences. I've seen Chinese-brand drivetrains (LTWOO) that can do this but I want something a ...
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What size front derailleur do I need for a 11/32 cassette and medium rear derailleur?
Upgraded 11/32 cassette. looking for replacement front derailleur
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Slight play in rear derailleur
for the first time I am doing basic drivetrain maintenance and I noticed slight play in my rear Shimano XT 12SPD mech. It does not occur at the place where the derailleur is connected to the hanger ...
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How can you determine that your derailleur is bent?
I have no experience adjusting the derailleur until recently. I followed the nice instructional video from Shimano. After I finished with the bike, a final test on the rack showed I was able to spin ...
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Which rear derailleur can I put instead of Shimano Acera
My rear derailleur on Cube Aim Race 29" has broken on the holder. Except for this (and prior to the holder breakage) the derailleur has completely stopped working for some reason. It twists into ...
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Is Mean Time To Retune FD and RD a major distinguishing factor between Sora and Ultegra?
Having gained experience riding both Sora and Ultegra, I'm puzzled that 2x9 already provides such narrow gaps that I'm entirely comfortable riding Sora (it helps that the cassette is 12-25), and that, ...
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Are the Shimano derailleurs sold on Ali Express genuine or fake?
I am trying to buy Shimano Alivio M4000 components. When I was researching on Ali Express, I found this. This is Alivio M4000 including the front derailleur, rear derailleur, left and right Shifters ...
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Sora front derailleur cannot reach top chainring cleanly
I bought a new bike specced with a sora front derailleur and left brifter. I've been unable to make the front derailleur shift properly. I sent a message to the manufacturer (no response yet) but I ...
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What's going on with the bonkers derailleur?
My friend changed her tyre with the bike upside-down, struggling to slot in the axle and the derailleur just fell off from pressure with her bare hands.
She is far away so I need to understand what ...
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Any fixes for pinch bolt crimp refusing to lock in place?
My cable shifter couldn't be secured in place because the stub of the metal shifter clamp keeps sliding over the derailleur's metal surface when applying torque to the bolt.
The clamp, instead of ...
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Does anyone make dummy batteries for eTap AXS derailleurs?
I just got a new Specialized Roubaix Expert with SRAM parts. I discovered that lengthy car rides drain the batteries because the derailleurs are triggered into activity by motion.
Solution? Take the ...
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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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Moving from Shimano 9- to Shimano 10- speed
I'm thinking of changing the 9-speed Tiagra rear mech on one of my (road) bikes to something, still Shimano, but 10-speed.
The obvious replacements I'll need are cassette, right-shifter and chain. But ...
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