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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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Remove crankset when no bolts visible

I'm sure this is a very common question, but I need to remove the pedals and crank from a CCM mountain bike frame - however, the pedals have no obvious bolts - the pedal arms simply bend 90 degrees ...
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1answer
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JIS and ISO square taper

I've read Sheldon Brown's page on JIS and ISO and have read exchanges in forums about the pros and cons of using ISO cranks on JIS bottom brackets. If my understanding is correct, these standards ...
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Front derailleur range suddenly has become very short

For a while when I was riding, there was a stiff feeling changing from medium to high on the crank. Yesterday it wouldn't change at all. I checked the adjustment of the High and Low screws by ...
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Stripped out bottom bracket

The bottom bracket of my bike was completely stripped to the point that when you push the left side crank arm, the right crank moves and you can see the bottom bracket lock move out the frame. The ...
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1answer
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Crank tool threads for a BodyGuard R6X

I need to replace a circuit board on my Bodyguard R6X exercycle. Bodyguard sent me the circuit board but little else with respect to information/instructions. I need to pull a crank so I need to buy a ...
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124 views

What determines crank length?

Without getting really technical what determines the length of the cranks that you would use on your bike? I was wondering if longer cranks without being ridiculous would act as a fulcrum and make ...
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5 arm cranksets versus 4. Which is better and why?

I'm looking to buy a Sora triple crankset. Shimano make two types one has 5 arms and the other only has 4 arms. Which should I get and why would that be a better choice? I'm a slow-ish rider. I'm 50 ...
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1answer
73 views

Is it safe to bolt my single-speed chainring to the other side of the crank?

Background: I converted a 21-speed bicycle to single-speed by removing the derailleurs and installing a single-speed freewheel and crankset. The chainline is no longer straight, and I would like to ...
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Changing my crank on a track bike and it wont turn

I bought a new crank for my bike, when fitted tight the crank is stiff to turn as I think it is rubbing against the bottom bracket housing. Any advice on what to do, have I bought the wrong crank?
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How much of a difference would shifting from a (24/34/44, 14x28) to a (28/38/48, 11x34) configuration make when going downhill?

I currently have a Proton MTB with a 24/34/44 crankset and a 14-28 cassette. I have found the configuration to be lacking when going downhill: The front chain ring doesn't feel stiff enough on the ...
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1answer
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Crank power meter incompatible with my bottom bracket

I have received a 4iiii crank power meter 170mm length that I can't install on my Merida trainer bike because it has square taper bottom bracket. What would be the cheapest way to have it installed? ...
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Minimum chainstay/crankset clearance

I have just finished to assemble a track bike (Cinelli Mash Parallax with Sugino DD75 crankset). Here is a picture of the distance between the right chainstay and the crank spider. I am anxious by ...
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Is there such a thing as a 25mm crank puller?

I have a BMX with a Primo Pro crank on it that I need to remove. The thread in the crank arms that the crank puller would normally screw into has 25mm diameter but I only seem to be able to find 22mm ...
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Which way does this ring go on the left crank of this Shimano deore hollow tech external bottom bracket crank?

On the inside of the left crank there is a small ring. The picture shows where the ring is meant to go. The ring is smooth / flat on one side. The picture shows the flat side which seems to have been ...
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1answer
51 views

Replacing FSA Omega BB30 with SRAM Force 22 BB30

following my recent post about the problem with FSA Omega BB30, I was advised to throw it away and go for a new one. I've done some research and decided to upgrade with SRAM Force 22 BB30, already ...
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2answers
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FSA Omega BB30 spindle comes out of drive-side crank

I have a Cannondale CAAD Optimo Disc Tiagra that came with the FSA BB30 bottom bracket and the FSA Omega BB30 50/34 crank set pre-installed. A couple of weeks ago I noticed that the chain started ...
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Can I setup my road bike, mountain bike, and fat bike with the same set of shoes with MTB SPD cleats?

Can I setup my road bike, mountain bike, and fat bike with the same set of MTB SPD cleats? Basically I have 3 bikes with VERY different cranksets and Q-factors that range from 148mm to 164mm to ...
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What type of crank fitting is this?

I have an old road bike I want to get a single speed crank for but don't know what fitting the bottom bracket has.
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2answers
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How to find replacement crank arm?

recently the crank arms on my Nishiki Colorado Comp 27.5 bike failed. I must’ve struck an obstacle with my pedals during my ride yesterday, because on the way home I noticed the right pedal was bent ...
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2answers
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Quarq Dfour Fit Problem

I recently buy my first Quarq Dfour power meter to replace my crank Shimano Ultegra 6800. but I have the problem that the quarq spindle its too short ( 106 mm quarq vs 109 mm shimano ultra ). I don't ...
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1answer
137 views

Correcting the chainline on triple crankset with chainring spacers

I have Marin Four Corners bike with 3x9 Sora crankset (most likely FC-R3030) for which chainline is not given on Shimano site, but I've read all road cranksets have 45 mm chainline. I would like to ...
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384 views

Is it possible to mix the rings in the crankset?

I wonder about such setup as buying 48/36/26T crankset and then replacing the smallest (26T) chainring with 22T one. What I am afraid of that I would get quite significant 14T in difference and when ...
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Ultegra 2X cranks with M8000 group and 11-42t cassette?

Will an Ultegra 50/34 front crankset work with a Shimano XT M8000 Shadow+ 11 Speed Rear derailleur and 11-42t cassette?
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1answer
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Truvativ 1x front chainguide - what's wrong with this?

I've been asked to inspect and fix someone's bike. Its a heavy full-suspension Kona "Stab Deluxe" downhill monster from 2006. The main fault is that the chain gets stuck between the front chainring ...
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1answer
82 views

Changing crankset

I'm new to mtb and have just purchased and waiting delivery on a Giant Stance 2, I would like to convert to a 1x9 with a smaller crankset, would I have to adjust my chain to suit a smaller single ...
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108 views

Alfine crank 1x9 setup, spacer issue

I'm currently rebuilding a 1992 Kona Cindercone as a 1x9 commuter. The rear spacing is 135mm and the bottom bracket shell is 68mm. I've mounted a alfine crank on it and remove the spacer that what ...
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2answers
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Minimum space between square taper crank and bottom bracket

I upgraded to a new square taper crankset on a single-speed drivetrain and now the gap between my crank and the bottom bracket is bigger. That's because the cranks taper shape is different from the ...
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2answers
107 views

Andel crankset, BB axle length and chainline

I was planning to buy an Andel Standard Track crankset. It uses 110mm axle bottom bracket, but the stock bracket on my bike is 103mm. Will this mess up my chainline?
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1answer
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Scott Addict R2 2008 crankset replacement

I want to replace crankset on my Scott Addict R2 2008. Current crankset is Dura Ace 7800. If I looked correctly then currently I am using BB SM-BB71-41. New crankset will use BB386EVO. Which BB do I ...
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1answer
206 views

Chainring bolt stuck in 105 FC 5800 chainring

See my update at the bottom of the question When installing my 4 bolt Shimano 105 FC 5800 chainrings on a modified FSA Gossammer Crank (TEAM ZWATT ZPIDER) I first test fitted the chainrings with ...
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1answer
108 views

What is this crank part called?

I recently had a Shun SS-8001 crankset fail. When taking it apart, I saw that the right pedal has a sort of stop ring that prevents the pedal, presumably, from unscrewing itself: Now I need to find a ...
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1answer
202 views

Is an SLX M7000 crankset compatible with the rest of my drivetrain?

I ride a Comencal Meta HT AM Origin. Unfortunately I need to buy a new crankset. I’ve been thinking about Shimano SLX FC-M7000 34-24T with a new bottom bracket, BB-MT800. Do you know if that ...
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1answer
90 views

How do I figure out what crankset replacement will fit my derailleur?

I have a bike with a Shimano FC-M560 crankset in the front which I want to replace. I naively bought a Shimano FC-TY301 crankset, thinking that there's norms and that 3-speed cranksets are more or ...
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689 views

What kind of crankset is this?

Can someone help me identify this crankset type? And is it possible to replace only the cranks (and their axle) without replacing the chainwheel/front derailleur?
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1answer
120 views

How to change small chainring

I have a bike with a 46/36T crankset (FSA Gossamer Cross BB30) and I'd like to change the small chainring to an even smaller one. ​Googling around ​suggests that the smallest chainring I can get for ...
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2answers
589 views

Ideal distance between chainring and chain stay

I am building a single speed bicycle, and I have most of the drivetrain parts: Rear hub 18T rear cog (40-40.5mm ideal rear chainline -- wheel undished) 1/8" chain crankset with 40T chainring I used ...
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3answers
181 views

BB spindle length/chainline for re-used Shimano FC-M391 chainset

I'm trying to rebuild an old Univega MTB. Primary goal is to build a good or decent bike from used parts. The crankset+bb that was on the bike when I got it was really worn out. I unscrewed it and ...
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2answers
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Loose thread (stripped) tapered bottom bracket frame connection

The threads in the MTB frame that is supposed to hold the bottom bracket lock rings were very loose and it can't hold the bottom bracket in place. The previous bike owner tried to apply Teflon tape in ...
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3answers
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How to tighten the Hollowtech II (on R2000 Claris) cranks?

The owner's manual on my new bike (with the new Shimano Claris, not the old one with Octalink) asks me to do this: After the first 20 km tighten the crankset and also tighten the pedals in the ...
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659 views

Can a 21 speed Shimano Tourney groupset get converted into a 7-speed?

I currently ride a 3x7 Tourney bike, which I’ve upgraded moderately and it is riding nice. I’d like to know if I can somehow replace my 3-crankset for a simple one, and also get rid off the front ...
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1answer
87 views

Self extracting crank preload

This question got me wondering about self-extracting cranks: What bottom brackets are compatible with Miche Evo Max cranksets (self-extracting type)? Where I've seen them on cartridge bottom brackets,...
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Do I need a spacer on my crankset? (2x11 SLX, BB shell width 92mm)

I have recenly changed my crankset from FSA comet to Shimano SLX. I have a pretty large BB shell (92 mm) and there is a press-fit BB installed, so it doesn't protrude. So how can I figure out if I ...
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2answers
887 views

FSA Comet (CKM-7158T) crank removal problem. How to?

I am dissembling an FSA Comet crankset, and I have removed the self extracting bolt from the drive side. But I cannot remove the crank arm, it is sitting super tight. I am hitting it pretty hard ...
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1answer
209 views

Front chainring spacing difference between Shimano and Campagnolo?

I want to upgrade my mid 80s road bike from a 50 tooth to a 53. But the BCD of the big triple chainring is some rare standard that it costs less to buy a whole (used) crank instead. And of course this ...
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1answer
804 views

What is required for a proper boost chainline on a 1x drivetrain - only a boost chainring or an entire crankset?

To obtain a proper chainline for a boost rear hub (~52 mm), is it enough to fit a boost (3 mm offset) chainring to a 1x crankset which is originally non-boost, or is an entire boost crankset required (...
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2k views

Clicking while pedaling

I recently purchased a 2nd hand bike, and I am facing a clicking noise when I pedal (under slightly higher than normal load). I feel it almost as a pair of clicks in both pedals, and I feel one click ...
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1answer
67 views

Crankset or chainring replacement

I have a Marin Bolinas Ridge 7.1, I am not happy with the front large chain ring size, I mainly ride on the road, and have an extremely limited budget. I would take it to the LBS, however, I believe ...
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1answer
212 views

Carbon fiber crank arm with scratches--how much damage is a concern?

I have a compact SRAM red crankset with carbon fiber crank arms. On the left side, the outside coating on the end has chipped off from sometimes colliding with the ground while turning. At what ...
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2answers
280 views

Sram crankset compatibility

I have a bike with SRAM s350 172.5mm 40T chainset, SRAM GXP 68mm BB and 12x142mm through axle rear hub, which should make my chainline 49mm. As I have knee issues I am looking for 165mm crank arms (...
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Why are crankset “sizes” often defined by the amount of cassette sprockets?

For example: https://bike.shimano.com/en-EU/components/road/category/crankset.html Almost all of the listed cranksets have sizes listed as 2x11/3x10/3x9 - why does the amount of cassette sprockets ...