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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2 answers
116 views

Is this crankset dead?

I bought a second hand bike and there was some noise and jerkiness coming from the driveline. I checked the chain and it was worn off, and I have changed it. Noise is reduced but still every now and ...
2 votes
2 answers
78 views

Will a 11 speed Shimano Deore crankset work with a 9 speed Shimano Altus cassette? [MTB]

I have a 2020 Vitus Nucleus 27 VR with a stripped pedal thread on the left crank arm (bought it secondhand, and am guessing the previous owner crossthreaded it). The current drivetrain is a 2x9 ...
1 vote
1 answer
48 views

Broken screw thread on GRX 800 crankset

I made my gravel-dream bike few month ago by hand. I followed all the user-manual sheets from Shimano in order to properly mount the GRX 800 crankset and the pedals on it. I respected the tightening ...
1 vote
2 answers
77 views

Crank Length Measurement

I need to check my crank length. How can I accurately measure it? Do I just use measuring tape as I was nervous of this because of the small difference between sizes I.e 172.5 175
3 votes
1 answer
231 views

Is an Ultegra shimano left side FC-R8000 crank arm compatible with Older Ultegra FC-6600

I have the opportunity to purchase a left sided power meter for a decent price, that is a newer FC-R8000 arm, whereas my bike currently has Ultegra FC-6600 equipped. My assumption is that because it ...
1 vote
1 answer
74 views

I cannot find the correct Crank Arm Bolt for my bike

Recently, when I was riding my bike, one of the crank arms fell off and I realized that the crank bolt wasn't properly adjusted when I ordered the bike, hence when it fell off, I was able to put the ...
0 votes
2 answers
74 views

Chain skipping teeth while staying on small front chainring

I recently converted my bike with 9 speed 105 from a triple to a double. I installed my new 34/50 crankset and noticed that chain would slip across the teeth of the 34t chainring whenever under ...
3 votes
1 answer
233 views

Chainring spacing of cranksets universal?

My understanding is that 7/8/9/10 chainring spacing is the same. I have a Shimano Claris double/2x8-speed that I want to upgrade to a triple front, but using a 10-speed crank. I’ve acquired a Shimano ...
2 votes
4 answers
222 views

9/10 speed chain with vintage 2x5 crankset

I have an old crankset from an 80s 10-speed (2x5) bicycle with downtube friction shifters. The chain currently in use is marked as "6/7/8 speed," but works fine on the 5-speed freewheel. For ...
4 votes
1 answer
97 views

Shimano R8000 right crankset compatibility with 105-5800

I have a full 105 5800 group for my current drivetrain on my bike. I would like to replace the right crankset (chainring + crankarm) with an Ultegra R8000 right chainring/crankarm. Is there full ...
11 votes
3 answers
6k views

What is "crank preload"

I'm in the middle of swapping my BB30 cranks from stock FSA Gossamer to a (shorter length) SRAM BB30 "IA" S950. The S950 has a "crank preload" adjuster on the NDS which the spindle is also attached ...
2 votes
2 answers
223 views

Upgrading Giant Roam 2 Crankset

I am having Giant Roam 2 Disc 2022 SouthEast Asia Model with the following Spec: Stem Giant Sport 8 Degree Front Derailleur Shimano Acera FD-T3000 2×9 Rear Derailleur Shimano Alivio RD-...
1 vote
2 answers
67 views

Do I need to replace bottom bracket and/or cranks for road-to-fixed conversion?

I have a vintage race frame with a Shimano Dura Ace 7400 series double-ring crankset on a Shimano bottom bracket of some kind. I intend to use the frame to build a fixed gear bike. As I understand, ...
0 votes
1 answer
36 views

Which Bottom Bracket do i need? 107mm 41

I cant´t find a Bottom Bracket for my Cube two 15 2017. It need a 107mm x 41. Please help me.
7 votes
3 answers
2k views

Carbon crank with loose pedal thread

I have a FSA Carbon crank where the thread/bolt for my pedal has become lose and wobbles. In all fairness the crank has has 20,000KM on it. Can it be repaired, can I replace just the crank, or do I ...
5 votes
1 answer
847 views

Are the chainrings supposed to have irregular sized teeth?

I just bought a Shimano Tourney 3 speed crankset (Fcty301 Jts01) and it came sealed in a Shimano bag, that was inside another sealed bag, but when I look at the teeth, they are not regular, some are &...
0 votes
1 answer
24 views

Is the Neco B910 bottom bracket's square taper JIS or ISO?

I'm looking to replace my cup and cone bottom bracket as my current one has deep grooves on the spindle. Because for some reason replacement spindles (113 total width, 68 shell width) are very ...
3 votes
2 answers
88 views

Sora 50/34 crankset used to replace FSA Gossamer crankset

I recently purchased a Boardman SLR 8.9 which features 105 shifters, 105 11/30 year cassette, 105 front and rear derailleur, FSA compact 50/34 gossamer 172.5 crankset and tektro front and rear rim ...
5 votes
4 answers
533 views

Is it possible to change chainrings to bigger on Shimano FC-MT500-B2 (2x10, 36T-26T)?

I'd like to change a chainring for Shimano FC-MT500-B2 crank on my Grand Canyon 5 bike, because current setting (36T-26T) is not enough for me. On my previous bike I had 44T and it was fine, and I'd ...
3 votes
3 answers
10k views

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 ...
6 votes
2 answers
34k views

Why does my non-drive side crank arm come loose?

I tighten the bolt super hard. Ride for a while. Then it comes loose again. I don't know if its my BB or the bolts. How can this be fixed??
0 votes
2 answers
19k views

What is my bottom bracket spindle length?

I have this ubiquitous cheap Wal-Mart bike (http://www.walmart.com/ip/26-Roadmaster-Granite-Peak-Men-s-Bike-Black-Green/45089317z), which has a square taper bottom bracket. I'm trying to buy a new ...
2 votes
2 answers
183 views

Shims between Crank and Chain Ring

I should like to move the chainring on my single speed bike a little further outward (fig 1). The reason is to have enough clearance between chain ring teeth and frame (fig 2). At present I have a ...
4 votes
3 answers
2k views

How to keep square taper cranks tight?

I have this recurring problem on many of my fixed-gear builds where the non-drive-side crank arm starts to wobble and gets loose after a very short amount of time (sometimes after just a short ride ...
1 vote
2 answers
2k views

Which way does this ring go on the left crank of this Shimano Deore Hollowtech II 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 ...
2 votes
1 answer
91 views

Shimano Alfine crankset Q Factor?

Do you happen to know what the Q Factor of the Alfine Crankset is? I've looked all over the web and can't find this piece of information. I'm interested in the single chainguard 42T version, and my ...
1 vote
1 answer
43 views

Swapping BB and crankset between bikes

I have a 2001 DeVinci Santiago road bike, which has a Shimano 105 road triple crankset and an octalink BB. I'm about to buy a 2010 Masi Speciale CX, which has a Truvativ Touro compact double and a ...
2 votes
1 answer
171 views

How do I measure my crank-arms?

I am interested in getting a left-side power meter for my road bike. It has Shimano 105 components. I'm considering a 4iiii Precision left-side crank, in a 105 or Ultegra version. I looked, and don't ...
5 votes
2 answers
784 views

Giant power meter left/right balance

I have a Giant TCR Advanced Pro 0 Disc 2021 which came with the Giant PowerPro power meter built into the cranks. I've seen people posting things like, "Don't take too much notice of the L/R ...
1 vote
3 answers
1k views

SRAM Force eTap AXS 2x12 compatible with Shimano 11-speed crankset and Shimano rim brakes?

I wish to upgrade my bike with the "SRAM Force eTap AXS 2x12 Upgrade Set"; this set would include the derailleurs and levers. The thing is, my current Shimano Ultegra 11-speed crankset (FC-...
5 votes
1 answer
137 views

How should I remove this crankset?

I recently acquired a 10 year old Cube Acid MTB which I intend to refurbish and convert to an ebike. I need to remove the crankset and purchased a crank puller. It seems to be a universal size but the ...
5 votes
1 answer
3k views

What types of BB-axle to crankarms interfaces are there?

On the lowest end, we have the taper/square interface. I believe it is standard i.e. there are no variations in the sizes. image property of VP Components USA Then there is the Octalink. Actually ...
7 votes
1 answer
254 views

How to attach a shimano crank arm power meter on a low end bike with a square taper crankset?

I have an old bike that has a cheap square taper crankset. And I would like to attach a crank arm power meter to it that will fit a Shimano crankset. Is there an adapter that can fit into the square ...
2 votes
1 answer
322 views

Replacement/substitute for a GRX 600/800 crankset

I'm currently building a gravel bike from (almost) scratch. Due to the lack of availability of the GRX crankset in Europe, I'm looking for a replacement part of the 2x11 GRX 600/800 crankset. So my ...
19 votes
2 answers
3k views

Plastic ring on new Shimano crankset, toss or keep?

I just got a new Shimano crankset and it has this plastic ring on the "inside" of the small chainring. I'm thinking that this just some packing material. Am I right and can I toss it, or is this a ...
4 votes
2 answers
501 views

Shimano pre-greased crank: where to spread the grease?

The Shimano Altus FC-M311 crank comes pre-greased with four generous drops of grease on one side of the crank's thread (the yellow circles in the image), but it's unclear where it should be used: on ...
6 votes
2 answers
303 views

Is there empirical evidence that SRAM DUB bottom brackets have longevity issues in the BB86/92 format?

It's well-known that bottom brackets designed for a 30mm spindle and a BB86/92 press-fit bottom bracket shell (41mm internal diameter) will have reduced lifespans due to the very small bearings that ...
5 votes
1 answer
4k views

Shimano 105 + Shimano Tiagra?

I am looking to buy a new high end performance road bike soon along with a power meter. I'm looking at possibly a Shimano 105 or Tiagra groupset. However, stages doesn't make a power meter for Tiagra ...
1 vote
1 answer
187 views

Can this combination work? SHIMANO RD M5120 with a M6000 drivetrain?

I definitely dislike the new proposals made by SHIMANO, but I have found that RD M5120 can be used in 10 or 11 speeds, it would only depend on changing the chain. Well, my doubt arises due to the fact ...
2 votes
1 answer
102 views

Crankset compatibility: Can I replace Shimano FC-M521 with FC-T4010?

I recently bought a Jamis Coda Elite (2012) second hand. I'm slowly replacing all of the drive train as most of the components are worn. According to p114 of the original product catalogue, the bike ...
3 votes
2 answers
72 views

Need Help Identifying Compatible Crankset(s_)For This Spindle

Bought a bike with stripped/straight-threaded cranks, so they are useless, wanted help identifying this type of spindle so I can go online and order a new crankset.
6 votes
2 answers
412 views

Wondering what type of pedal/adapter I need for these crankarms

Just bought a Rocky Mountain Dirt Jumper, not sure about the exact model because the previous owner custom-painted it. It is missing a pedal and I noticed that the crankarm wasn't threaded like a ...
0 votes
1 answer
103 views

Does a ROTOR Bikes 3DF or 3D+ axle/spindle remove?

Anyone know if it's possible to remove the axle from the left non-drive side ROTOR 3DF XC3 crank arm? It has a spline, so it looks like maybe a tool would do it, but probably proprietary? Or maybe it'...
4 votes
3 answers
3k views

What are the advantages of 4 arm cranks for road bikes?

Are 4 arm cranks the future for road bikes? What are the advantages?
6 votes
2 answers
588 views

Can I change my large chainring without changing the entire crank

I am running a 2x10 Deore M4100 set up on my current bike. My crankset is 36/26 T and my cassette is 11-42T. I want to make this bike faster, and I want to know if I can just replace the upper ...
3 votes
3 answers
5k views

How to remove a stuck SRAM AXS (Dub) crankset

I wanted to remove my relatively new SRAM RED eTap AXS crankset from my bike and I'm having problems trying to loosen (meaning: being unable to) the main 8mm hex bolt on the drive side, the step shown ...
3 votes
2 answers
196 views

Remove Shimano 105 left crank arm

I'm trying to remove the left crank arm. I've previously been able to do this with a 10 mm Allen key. But as you can see, this time it's stuck. Does anybody know which tool is best for the job? I fear ...
0 votes
1 answer
52 views

Bottom Bracket Axle wobbling while cycling?

The other day, I was riding up a hill and crack, something happened to my front derailleur. The chain rings now wobble back and forth on the horizontal axis as I pedal. I decided to take a look and ...
2 votes
1 answer
248 views

Why does crank arm need both a bolt and teeth to be fitted to the spindle?

I think the title is self explanatory: why wouldn't either one or the other be enough? After removing the bolt, you still need a specific tool to pull off the crank arm from the spindle, because the ...
7 votes
2 answers
11k views

Swapping cranks, but the new crank is wider, how do I compensate for this?

I was swapping the cranks and bottom bracket on my karate monkey from a Truvative stylo crankset (Mountain Double, GXP bottom bracket) to a Race Face Evolution DH (Mountain Triple, Race Face bottom ...

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