Questions tagged [crankset]

The crankset is the combination of components that convert motion from the rider's leg movements into rotational motion to drive the chain and propel the bike. The crankset includes one or more chainrings (sprockets) and the two cranks, or arms, to which the pedals are attached.

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Chain drops off outwards betweeng plastic guard and last cog on crankset

Chain drops off outwards between plastic guard and last cog on crankset. This effect i mostly managed to remove by moving front derailleurs inside (not happened since). But looks like the core issue ...
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Removing the crank arm (square taper) on a Chinese (PooBoo D 577) stationary bicycle

In trying to remove the crank arm, I found that the threaded "business end" of the standard crank arm puller has a smaller diameter (1-2 mm) than the crank arm opening, so there is no way to ...
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6 votes
3 answers
359 views

30mm bottom bracket and 30mm spindle axle compatibility, should it go in by force?

I am not sure if this is a stupid question or not. Finding compatible parts is not so easy for MTB, after quite a search I found my bottom bracket shell is not so standard, PF107. I bought a Rotor ...
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2 votes
2 answers
923 views

Replacing 1x SRAM chainset with a Shimano chainset

I've just got a Genesis Datum 2019 bike on clearance. The spec wasn't exactly what I would want—for a start it has SRAM rather than the Shimano we have on other bikes in our household—but more ...
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1 answer
343 views

Replacing a crankset, do I also need to replace the bottom bracket?

I'm planning on replacing a Shimano FC-510 crankset with an FC-R7000. The bottom bracket has had light use (~2000km) and has no obvious play in it, however the videos I've seen showing removal of ...
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17 votes
6 answers
9k views

Is it bad for the bike to pedal backwards?

Whenever I near yellow or red lights, I slow down and pedal backwards as I coast so that I can continue to get exercise while I wait for the light to turn green before I reach the intersection. (It's ...
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How does expensive cranksets affect the performance? [duplicate]

I never upgraded my 3 speed Suntour XCT302 I got with my Cycle 7 years ago. It seems to work well and I don't find the need to upgrade it anytime soon in the future but what I wanna know is how do ...
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8 votes
2 answers
1k views

Crank-arm fell off *after lube*

Background I've had my bike for several years and it's been fine with moderate use, but this summer, I ended up using it a lot (I rode almost 200km in less than three weeks). Problem It started ...
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5 votes
2 answers
453 views

Do forged alloy crank arms suffer from age-related fatigue?

Alloy does have not have a fatigue limit. Does that mean that forged alloy crank arms have a theoretical end of life? Should I worry about 40 year old crank arms? Could someone with a little knowledge ...
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Compatibility of 41mm x 107mm bottom bracket shell

Hi I have spent several days looking for a bottom bracket and crank. At this point it seems that there is nothing but 1 traditional pressfit bottom bracket and 1 crank that fit this shell. However, I ...
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8 votes
3 answers
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What are the advantages and disadvantages of the different chainset designs?

Over the decades there were many different crankset and especially spider designs: 4, 5 or 6 arm spiders, symmetric or assymetric, different BCDs, direct mount and probably many more. When looking at ...
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Which kind of crank arm for my bottom bracket

I'm trying to make my indoor bike smarter by fitting a crank arm power meter. The bottom bracket is a Tange bc 1.37x24t. Apparently it is of the English kind which is the most common. Since there are ...
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4 votes
3 answers
835 views

Alternatives to Crankset Shimano M523 Octalink 40-30-22T

I have recently purchased a Merida 2015 7500 One-Twenty 3x10. Link to bike specs: http://online.fliphtml5.com/pvouz/azox/#p=12 The crankset chain rings are very worn and need replacing. More Pictures ...
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2 votes
2 answers
609 views

Bottom bracket spindle length

I have a square taper (JIS) Shimano UN-55 bottom bracket with dimensions 68mm (shell width) and 110mm (spindle length) on my single speed (chainline 42-44mm). Can a set of Stronglight JIS track crank ...
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Weird sounds from Sram GX crank / shifters?

When moving the chain backwards while bike is standing, I hear some weird sounds.. I made a playlist on youtube and would greatly appreciate some help :(. Video titles give more details. Should it ...
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Finding the right bottom bracket crankset combo

I need to change my bottom bracket and crankset. But I'm not sure what to buy. I know it's an eccentric botton bracket and I still need one because I use the internal gear hub Shimano Alfine. My ...
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Upgrading the crankset - Scott Aspect 960

First of all a big thank you for everybody who can help out with the question! The bike is Scott Aspect 960: https://www.scott-sports.com/gb/en/product/scott-aspect-960-red-bike Currently the highest ...
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940 views

Crank arm loose (squared taper). Can it be fixed?

My problem is that my squared taper crank arm keeps on coming loose no matter how hard I tighten the bolt - it also starts creaking. Here’s a video of the problem https://giphy.com/gifs/...
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2 answers
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CDF touring build with mtb crankset and road shifters

I want to build a genesis croix de fer bike. The usage of this bike will be touring, with rear and front panniers, for an approximately 6 month autonomy travel. I am starting from zero, so there are ...
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1 vote
1 answer
179 views

Italian bottom brackets and modern cranksets - a compatibility guide?

I have an Italian frame (presumably a Moser) which I chose to repurpose as a single-speed/fixie with parts from another Single-speed/fixie of mine, with the exception of the bottom bracket and ...
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3 votes
1 answer
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Bontrager crank removal

I'm struggling to remove the cranks from my bike. I have a 2005 or 2006 Trek 2100 road bike with Bontrager Race cranks (triple chainring, marked "9 Speed" and "ISIS Drive"). It ...
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5 votes
2 answers
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Changing crank set

I’ve managed to totally knacker the thread on my crank due to a poorly fitted pedal and it’s looking like a new crankset is required. Will I also have to change the cassette and chain?
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1 vote
0 answers
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Shimano EX Crankset Pedals Compatibility [duplicate]

I recently bought an old Shimano EX crankset, which I'd like to mount new clip-on pedals to (Shimano Dura-Ace PD-R9100). Does anyone have any experience with using new clip-on pedals on vintage cranks?...
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2 answers
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Replacement crankset for MegaExo BB 24mm on 8 speed bike

I have a Specialized Allez E5 from 2017 with Shimano Claris (8 speed) and I'm looking to replace my crankset. I believe this is my current crank. My specific and potentially stupid question - am I ...
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1 vote
2 answers
208 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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14 votes
4 answers
3k views

Should square taper cranks be greased before installation?

There’s a fierce debate over whether the interface between a square taper spindle and crankarm should be lubricated or not. Adding to that, everyone seems to have their own take on the issue. Here’s ...
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Can I fit a RaceFace crankset with a SRAM bottom bracket (and how do I know)?

I have a bike with a SRAM BB https://www.sram.com/en/sram/models/bb-gxp-a1 I’d like to fit these cranks https://www.chainreactioncycles.com/race-face-ride-narrow-wide-10sp-mtb-chainset/rp-prod113370 ...
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4 votes
1 answer
498 views

Clicking noise from drivetrain under load

So when I pedal under high pressure, one crank arm loudly clicks one time at position 1 or 2 (non-repeatable click) and when I continue, the other arm does the exact thing at the same position. The ...
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0 votes
3 answers
308 views

How do you compare chainsets on MTB? Which is better?

I'm looking at getting a decent mountain bike that will probably spend quite a bit of time on the road. I found that the most common types of chainsetsare either: Shimano Altus 2x9 Shimano Deore 1x10 ...
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3 votes
1 answer
84 views

What bike crank do I have and how can I re-attach?

So during quarantine i've picked up a hobby of bike riding. Recently while going for an afternoon bike ride I noticed one my pedals were shaking but I just ignored it. When I was finished riding I ...
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Custom/modified Drivetrain 2x/3x Considerations and Planning

Planning a drivetrain setup for a new bike: Currently running old Shimano 3x9 44/32/22t on 11-34t, which gives me 19-115 gear-inches (about 620%). I used 29x2.0, 170mm crank to calculate my current ...
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18 votes
7 answers
5k views

What if both wheels were powered by pedalling?

Only the rear wheel of a bike is connected to the drivetrain in order to propel the bike forward. I assume the choice of rear wheel instead of the front wheel is for stability (e.g. avoiding '...
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6 votes
1 answer
397 views

Left-right play at bottom bracket

Today I noticed that there's a left-right play at the bottom bracket of my bike. You can see a video below. On the video, it looks like I am moving it with force, but I am not: it slides with ease, ...
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2 votes
2 answers
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Change Shimano Ultegra R8000 crankset

I'm considering getting a Canyon Endurace which use a 52/36 Shimano Ultegra R8000 crankset. As I plan using the bike for long, multi-days ride it would make sense for me to have an easier ratio. Is it ...
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6 votes
3 answers
7k views

Change Shimano GRX 1x to 2x

This may be a stupid and uncommon (definitely seems so) question. Also forgive me for potential etiquette violations, as this is my first one on bike stackexchange. I'm thinking about buying a gravel ...
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3 votes
3 answers
258 views

Measuring BCD & choosing right chainset

I bought a used bike whose chain keeps slipping, and I believe it is because either the chainring or the bottom bracket is bent. I tried to show this as best as I could in the below pictures. I am ...
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1 vote
0 answers
31 views

Can I swap in a 2x Shimano 600 FC-6400 crankset to replace a 3x RX-100 crankset?

I have a 2x Shimano 600 FC-6400 crankset. Can I just replace the 3x RX-100 crankset? Will I need a new BB? thanks in advance!
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0 votes
1 answer
214 views

Converted to drop bar and dual brake/shift levers and problems with front derailleur

Hoping someone can help out here. I had originally had a 2016 Kona Deluxe hybrid. Over the years I changed to bullhorn bars with the original shifters etc. I love this bike, but I wanted drop bars and ...
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0 votes
1 answer
550 views

Conversion to single speed: crankset specs?

I picked up a cheap frame recently which came with bottom bracket, 3x speed chainring, crank arms and pedals, handlebars, forks, and front & rear rim brakes. I've removed the chainring and right ...
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2 votes
1 answer
2k views

Crankset compatibility: Specialized Stout XC vs. SRAM GX 1000 GXP

I need to replace the crankset on my Specialized Rockhopper 29 Expert (year 2017) due to damage. I would prefer not to replace the BB to minimize the cost/effort. The original crankset is described by ...
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1 vote
1 answer
198 views

Ultegra 6800 chainrings and Claris r2000

Does claris R2000 crank arms can fit ultegra 6800 chainrings?
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4 votes
3 answers
2k views

Replacing a crankset after 1 hour!

First time here! My brand new bike arrived this evening and I’ve broken it with an hour. It’s a Vitus Nucleus 27 VR Bike (Altus 2x9) 2020 I took it out and about 50 mins into the ride I noticed the ...
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1 vote
1 answer
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Left crankshaft arm broken - can I use a different manufacturer?

Good evening, My left crankshaft broke on my Voodoo Masala hybrid bike (Halfords). It has a Suntour XCT9 crankshaft. Frustrating it’s cheaper to buy and entire replacement Crankshaft than the left arm ...
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1 vote
1 answer
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SRAM BB30 cranks - how to remove crankarm from spindle?

I have SRAM S2200 (X.0) cranks with a BB30/PF30 spindle. They are 3-piece ones, with the self-extracting mechanism on the right (drive) side, and a regular non-puller bolt on the left side. I want to ...
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3 votes
1 answer
156 views

What is the difference between 9sp and 10/11sp cranks/chainrings?

I have a 9sp setup I’m very committed to, mostly because I can’t find 10/11sp indexed downtube shifters (Dia Compe makes a non-indexed 11sp and that seems to be it). I want a new crank with swappable ...
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1 vote
1 answer
1k views

Crank Length 165mm or 170mm? mixed views

I have been doing a lot of research into crank length, I have a 172.5mm crank which I find my knees come up too high, and sometimes I get a bit of back pain. I have a Scott Speedstar 2017. I am 175cm ...
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3 votes
1 answer
100 views

What kind of bb is this?

not sure what kind of bb mount this is for a crank? It’s like this on both sides
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4 votes
1 answer
273 views

Chainring loose around drive-side crank arm / axle

The splined thing in the picture moves very slightly in relation to the chain rings - it seems to be worn. I don't know how to remove it, or if it is even supposed to be removed. This is an old bike ...
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4 votes
3 answers
2k views

How can I know if a crankset is compatible with my bike without physically seeing it?

I'm using Shimano Tourney TX right now and would like to upgrade. I can only shop online and can't visit physical bike shops. I'm leaning towards SORA R3000 but I'm not sure if it has the same BB size ...
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5 votes
2 answers
272 views

Can't thread crank puller

I'm in the process of replacing crankset and bottom bracket on my road bike - square taper type spindle. Bike is only four years old and bought from new, so all original parts with threads in good ...
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