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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On ensuring crank compatibility

I have a Haro Steel Reserve 1.3 bike (https://archive.harobikes.com/mtb/2016-mtb/steel-reserve-1-3-2016) with "Chromoly 2-pc 8 spline cranks". I am looking to replace said crank. I have my ...
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4 votes
4 answers
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Better climbing on a road bike with changed bigger cassette and smaller crank?

Looking for the advice of professionals. Maybe common question from a dummy cyclist, but… Problem: I have an endurance Trek Domane SL6 2023 bike Shimano Ultegra groupset with crank 50/34t, and ...
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3 votes
1 answer
734 views

Fuji bolt fell out please help!

Hi all. I have an old Fuji and there's a bolt that holds the crank in place. It fell out and is lost unfortunately and I am looking for a new one. Does anyone have any ideas? I'd really appreciate it!
6 votes
2 answers
164 views

Crankset repeatedly degrades even after bearings and brackets replaced 3 times - what's wrong?

I'm repeating words that the bike shop told me or from a google search. This bike seems to be defective since purchase. It's a Schwinn Men's GTX3 Hybrid with 700c wheels. Within a few weeks the pedals ...
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1 vote
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Chainring compatiblity for FC6570

Hey guys I want to know which chainring can fit on Shimano FC-6750 crank arms? Ive tried to find it in a app called carousell(a place where you sell products) and I can't find any. I had to go google ...
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4 votes
2 answers
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Changing front chainrings

I picked up a used 2006 Trek 520 for pretty cheap as a project bike. This bike: https://archive.trekbikes.com/us/en/2006/trek/520#/us/en/2006/trek/520/details (specs are on that page). I took it ...
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5 votes
2 answers
811 views

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 ...
7 votes
1 answer
111 views

The spin of crankset creates periodic sideways wobble of the whole bike. What is the problem?

I have enountered a strange problem with a fixed gear build: when the wheel/crankset spin, the crankset's rotation creates a periodically pulsating sideways wobble on whole the bike. It can be felt ...
0 votes
1 answer
72 views

Back wheel is slipping when pedals are rotating both the front and back sprockets

When pedaling, the front chainring turns the back crankset which rotates the back wheel. However, sometimes it slips, meaning when rotating the pedals which turns the back crankset does not turn the ...
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6 votes
1 answer
416 views

How did Shimano solve Boost offset in double cranksets?

From what I've read SRAM solved Boost offset by making Boost and non-Boost chainrings. So the cranks are the same, you need to buy specific chainring. What about Shimano? Is offset within cranks or ...
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3 votes
2 answers
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Is Shimano MTB front derailleur compatible with SRAM crankset?

I have 3 pieces to make this work -- brifter, FD, and the crankset -- in 2x10 setup. From this post -- Compatibility of Tiagra 4700 shifter with MTB front derailleur -- I gather I can match Tiagra ...
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4 votes
2 answers
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Rotor Crank and BB Rubbing Noise on Road Bike

Just bought a new Corratec CCT Evo and there has been an annoying noise from the crank. It's a rubbing noise that is always present when pedaling at any cadence or power. Listen here: https://...
5 votes
3 answers
356 views

What's a good single chain ring size for a 7s 12-28 cassette for better hill climbing?

I have a Decathlon Triban RC100 road bike with a 7 speed 12-28 cassette and a 44t single chain ring crankset. Since I live in a city with a lot of hills and use this bike to commute and carry weight ...
4 votes
5 answers
693 views

How to securely attach a single-piece cadence sensor on bikes with steeply-angled chainstays?

With chainstays set so steeply outward to accommodate wider tyres, the gap between the cranks and the chainstays is truly minimal. How do you secure your single-piece (accelerometer-based) cadence ...
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Stuck chain sprocket on bottom bracket

I have a 3pc sinz BMX crank set that I've taken off of an intense pro to install on a 1999 Redline RL380. After cleaning and greasing the bearings I went to install the bottom bracket axel with the ...
1 vote
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Fixie bike crank/pedals give in when back pedalling

Recently was given a fixie, but with braking issues. Whenever I back pedal (as in lock up and stop pedalling completely), the crank/pedal seems to give in and not stop the rear wheel from moving ...
11 votes
3 answers
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Can I update a decade-old mountain bike to modern standards?

About ten years ago, I built myself a new bike, for general utility riding and some light trips through the countryside (tens of miles on towpaths etc). I was most familiar with the classic (hardtail) ...
6 votes
3 answers
601 views

Crank-based Power Meter for Shimano Sora

I am a junior amateur cyclist and I have a road bike with a Shimano Sora groupset (shifters, crank, front and rear derailleur, cassette). I am looking to step up my cycling to the next level and have ...
4 votes
2 answers
269 views

Crankset replacement and compatibility

I got a new gravel bike and the crankset has only 42T which is a bit less thank ideal for a flat country like Denmark. I tried to find compatible cranksets, but I didn't find any relevant info except &...
2 votes
3 answers
127 views

Something feels like brake rub but isn't brake rub

I brought my road bike on a flight last week and after I put it back together I immediately noticed it felt slow and muddy. It felt like I had brake rub or a mushy back tire. I'd say it feels about ...
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3 votes
4 answers
1k views

Removing a pedal that has skipped a thread

When getting on my bike I stood on the left pedal and my full weight caused the pedal to skip a thread. The pedal is now squinted and stuck in the crank. The pedals were cheap, but I am hoping to ...
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3 votes
1 answer
74 views

Adaptative Pedal or crank for a handicap user

I encountered a person with a disability in one leg. They are unable to control their ankle/heel movement. They are unable to maintain their foot parallel to the floor at the top of the pedal stroke (...
2 votes
1 answer
76 views

Changing the crank set on an old roadbike

I recently bought an old (and cheap) road bike and I quickly noticed that the bike's crank set is "broken" because it had a weird bump when pedalling. I took apart the crankset, and noticed ...
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9 votes
1 answer
462 views

FSA "24 mm" crank stuck in Shimano "24 mm" BB

I'm beating myself over the head after trying to mount an FSA Gossamer crankset into a Shimano BB. My MegaExo BB had developed play, and drag, and squeaking, so I thought I'd replace it. Bought the ...
3 votes
2 answers
152 views

Where to get a crank puller for a vintage bicycle?

I'm trying to restore vintage bicycle I happen to own. I came to the stage of pulling cranks off and it apperas that I can't find the appriopriate tool to do that. Could anyone advice me on this? I ...
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1 answer
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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 ...
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1 vote
2 answers
153 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 ...
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391 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 ...
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1 vote
2 answers
91 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
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1 answer
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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 ...
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1 vote
1 answer
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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 ...
1 vote
4 answers
152 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 chainring. I installed my new 34/50 crankset and noticed that chain would slip across the teeth of the 34t chainring whenever ...
2 votes
4 answers
468 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
506 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 ...
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2 votes
2 answers
491 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
188 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
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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.
0 votes
1 answer
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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 ...
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5 votes
1 answer
913 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 &...
3 votes
2 answers
168 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 ...
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5 votes
4 answers
719 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 ...
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2 votes
2 answers
563 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 ...
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1 vote
1 answer
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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 ...
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3 votes
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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 ...
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5 votes
1 answer
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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 ...
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5 votes
2 answers
1k 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 ...
7 votes
1 answer
412 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
1k 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 ...
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4 votes
2 answers
603 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 ...
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6 votes
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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 ...
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