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.

learn more… | top users | synonyms (2)

0
votes
4answers
79 views

Best way to get rid of a “squeaky” bike?

I'm a college student and my bike is part of my daily commute to class. However, last semester my bike began squeaking and the squeak got louder and louder as time went on. I tried spraying some WD-40 ...
13
votes
4answers
899 views

Why use multiple materials on chainrings?

Why is it that on a typical mid-level road triple crankset, the outer rings (larger rings) will be aluminum, while the inner ring (small ring) is chro-mo? It seems to me that if aluminium was good ...
0
votes
1answer
23 views

What bottom bracket fits a Truvativ E450 crank?

My bike has a crank that is so cheap that you won't find it mentioned on SRAM's web pages. This cheap crank is a Truvativ E450, and it has a square taper bottom bracket that is worn out and needs ...
0
votes
0answers
22 views

Which Shimano inner chainrings compatible with FC7700 (9s) crank?

I have a 7700 (9s DA) crankset (53/39), 7700 front and rear changers, and ultegra 12-23 9-speed cassette. I want to reduce my lowest gear, so I decided to swap the inner 39t with a 36t ring. My ...
2
votes
2answers
1k views

Noise from crankshaft spindle and then the pedal falls off

In the last 6 months I have been getting really bad noises, creaks, clunks, etc coming from somewhere around the spindle connecting to the crankshaft. Every time I put pressure down on the left hand ...
10
votes
4answers
8k views

What is the effect of changing length of crank arms?

There are some length options for the crank arms - like 170mm, 175mm. What is the difference for the rider? In which way does it effect the commute? Tried looking at Selecting the right crank ...
2
votes
1answer
57 views

click noise from chainrings

I'm experiencing clicking noises when I put pressure on the pedals (either side). The bike is a CAAD12 105 (it has FSA chainrings). I've done some investigation to pinpoint the source of the clicking....
0
votes
0answers
17 views

GT Aggressor SR Suntour XR27 crankset is worn out. New replacement?

Help finding a XR27 or new replacement. i tried the crankset from my other bike ,but, the small ring hits the frame because it is different backspace. 1999 GT Aggressor 20".
28
votes
14answers
123k views

Creaking from cranks/spindle. How to fix?

Recently the cranks on my bike started to creak. I checked with my usual "bike-bible" Park Tool. They recommended dis-assemble, lubricate, re-assemble. So I did that. Remove cranks. Remove spindle. ...
9
votes
5answers
12k views

Noticeable clicking from crankset or bottom bracket

A few days ago I began hearing a clicking noise coming from the crankset and I can also sense a slight hitch when the right crank is at its upmost position just when it's about to go down. The ...
1
vote
1answer
54 views

New bottom bracket and crankset - what spindle length?

I have a bike that I'm doing up as a project and I need to replace the bottom bracket (old-school square taper). Since the front chainring (single, 46 teeth, riveted) is pretty badly worn I was going ...
0
votes
0answers
99 views

Does this used bike have visible issues?

I've been riding on a Cannondale Carbon Synapse since 2012 for 2,000+ miles and need a replacement and upgrade. I'm looking for used bikes since I can't afford the cost of a higher end bike (with an ...
1
vote
0answers
22 views

Better to go with a longer spindle length bottom bracket or shorter?

I have a 1987 Panasonic dx1000 that I am converting to a single speed. I was planning on replacing the bottom bracket. To get the measurements I measured the tube to be 70mm (2 3/4") and the spindle ...
0
votes
1answer
41 views

Compact crankset to 1x

My MTB has currently a Deore FC-617 2x crankset. I am looking what components I need to convert to 1x. Do I need to change the crankset, or simply getting a new chainring for my existing crankset will ...
1
vote
3answers
73 views

What parts needed with new chainring?

I've read that the chainring is that spikey gear wheel at the bike's pedals that the chain egages with. The teeth on that chainring are so worn on my bike that the chain jumps off depite adjusting ...
1
vote
2answers
48 views

Can I convert a 1x9 speed Madsen kg271 cargo bike to a 2 or 3 x 9?

I know most these days seem to want to go the other direction, but my partner would like more gears on this heavy cargo bike that can be tough to pedal uphill. I think the frame has all of the ...
3
votes
3answers
72 views

Disassembling crank on a 2006 Trek Pilot 2.1

I'm trying to disassemble the crankset on my 2006 Trek Pilot 2.1; the bike has all OEM parts. The crank is a Bontrager race crankset, which I'm to understand is a a rebranded Truvativ crank. For a ...
1
vote
1answer
37 views

Do I need a different bottom bracket?

I have a road bike that has a triple chainwheel setup (48x38x28)in which the chainwheels are not replaceable. (Made by SunTour) The middle chainwheel has broken a tooth so the whole thing needs to ...
3
votes
2answers
74 views

What is the advantage of a “compact crankset” vs changing a chainring?

It seems that I'm old (my last good bike had a 5-speed freewheel and shifters mounted on down tube braze-ons - they were indexed, though!), and I've been out of cycling for quite some time. I've seen ...
1
vote
3answers
90 views

Stripped threads on left crank on the first ride

I just purchased a new road bike and had a friend assist me in the assembly. There must have been a problem because it fell off after only 2 miles of riding for the very first time. I used a pedal ...
2
votes
1answer
99 views

Chain line adjustment when replacing triple crankset with single

I have an old Univega MTB with a triple 28-38-48 crankset and 6-speed freewheel. The bottom bracket is square taper with cup and bearings. I want to remove the front derailleur and convert to 48T ...
4
votes
3answers
406 views

Problem with inside of shoe clipping crank arm

Crankset Shimano FC-S125, 105 Golden Arrow and I know I'm using the right bottom bracket (119mm) The pedals Shimano Clipless SPD M505 My shoes Broken link, please fix I've got a problem with my ...
5
votes
1answer
126 views

Replacing Crankset

My dad bought a 2004 Fuji Absolute hybrid used and I rode it to a DIY shop to get everything checked out. On the way, the the chain came off once (1.5mi). Turns out the right crank arm is a little ...
3
votes
2answers
178 views

Bottom bracket replacement advice needed

I've got a Giant TCX SLR2 (2015) according to the spec sheet it has:- Crankset: FSA Gossamer Pro Cross, 36/46 Bottom Bracket: FSA MegaExo The other day I noticed the bottom bracket isn't sounding ...
3
votes
1answer
231 views

Why is 53/39 known as “standard” for road bikes?

In common cycling parlance, 53/39 is referred to as "standard" gearing for road cranksets, and most mechanics or experienced cyclists will understand that if you say you have a "standard crankset", ...
1
vote
1answer
156 views

New bottom bracket, asymmetric cranks

I am seeking help for a "dilemma" I have with my upgraded bike. I have an old KTM Ultra Line (2004) that I have upgraded with a new chain wheel (FC-M590 48.36.26t), a Shimano BB52 bottom bracket (...
1
vote
1answer
43 views

What large chainrings are compatible with Shimano FC6603 crankset?

On my race bike I have a crankset FC6603. I want to replace my outer chain ring (My inner and middle chainrings are OK). But I cannot find an online store where they sell the outer chainring of this ...
1
vote
1answer
48 views

How do I keep smallest gear on my crank shaft from contacting frame

I have an old Trek 8000 ZX that I am fixing up. I had to replace the bottom bracket and I believe I successfully did that. The bike did not have a crank set to work with so I salvaged one from a pile ...
6
votes
4answers
239 views

Does (square-taper) BB spindle length affect Q factor?

I am having knee and ankle trouble on my commuting bike (1993 Specialized mtb) and this has a 73mm BB with a spindle length I haven't measured but there is space between crankarm and frame. I wanted ...
4
votes
2answers
142 views

Cutting off welded crankarm

A long time ago, when I was younger and stupider, I decided to fix my creaking crank arm by welding the bolt. Yes, I know it was so damn stupid, but I thought that was the problem. I didn't use the ...
3
votes
1answer
75 views

Replaced left crank arm but still comes loose?

A few weeks ago I bought a new (albeit cheap) self assembly bike from a local store, this bike to be exact http://tinyurl.com/gw77p9t . After about two weeks use (one and a half hours of cycling on ...
14
votes
2answers
1k 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 ...
0
votes
1answer
59 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 ...
1
vote
1answer
80 views

Can any crankset be used?

I have a road bike (2013 Schwinn Tourist) with a sealed bottom bracket (107mm spacing) with a square taper and triple chainwheel (48, 38, 28) assembly that is one of the inexpensive riveted types. I ...
1
vote
1answer
57 views

Can I install a front derailleur for my bike?

I just bought a Micargi RD-7 with 7 speed Shimano Tourney rear derailleur. Now, I want to upgrade my crankset from single chainring to three chainrings for better hill climbing. Is it possible to do ...
3
votes
1answer
60 views

Limits on tooth difference when replacing crankset

Would it be possible to replace a 46/34 compact crankset to an even more compact 42/26 (SPA CYCLES TD-2)? The bike is a Specialized Awol Elite, which uses a Tiagra groupset (except the crank which ...
2
votes
2answers
136 views

Bicycle crank is wobbly

My bicycle's crank is sorta wobbly - it tilts left or right, according to pressure applied to pedals. How do I fix it? What tools do I need? Video showing the wobble.
5
votes
3answers
2k views

50/34 vs 52/36 crankset for 11-32 cassette (shimano 105 5800FC)

Following up on this enlightening answer, I would like to know the differences between 50/34(compact), 52/36(mid-compact) and 53/39 (standard). The cassette I am choosing is 11-32 to give me a wider ...
0
votes
1answer
62 views

Issue with PF30 BB on Boost frame - 2-3mm crank arm clearance

I have a brand new Titanium Boost 29er hardtail. The frame uses a PF30 BB and the BB shell is 73mm wide. I have installed the recommended RaceFace cinch PF30 bottom bracket with a Race face Next SL ...
11
votes
1answer
782 views

What's this? Photo of bicycle with pedals by the rear wheel

I just stumbled upon this photo of what appears to be a reasonably normal citybike, except it looks like it has a second set of pedals at the rear wheel. source Anybody knows what it is?
1
vote
1answer
64 views

cranks for a JIS bottom bracket

My bike is a 2016 Brompton, I am thinking to swap current cranks. Current BB possibly is this one (a JIS square taper), model: stronglight jp400 119 mm. http://brilliantbikes.co.uk/brompton-bottom-...
0
votes
1answer
68 views

How does this work? “Rotor BB30 to 24mm Steel Road Bottom Bracket”

I'm looking at ways to make a Claris/Tourney crankset fit a BB30 frame. I've seen that a "Rotor BB30 to 24mm Steel Road Bottom Bracket" is one of the options to make the two sizes work together. ...
1
vote
4answers
744 views

SRAM Force 22 chainset in an otherwise 10-speed SRAM setup

I notice that SRAM web site still lists "regular" 10-speed Force chainset as one of their products. However, my attempts to find it for sale online came up with almost nothing. It seems to be "barely" ...
5
votes
4answers
648 views

Trick or tool to help line up 48 splined crank arms

Besides eyeballing it and comparing the line to the seat tube, are there any tricks to getting 48 splined crank arms perfectly aligned? I must have spent a solid 15 minutes looking at them from every ...
3
votes
3answers
167 views

Cranksets for tandem with internal gear hub

I am thinking about assembling a trekking tandem bike. I would like to use an internal gear hub and put both chains on the right side of the bike. I have some questions about the cranksets: What ...
1
vote
1answer
54 views

Are the Truvativ powerspline BBs reliable?

When I first got my Haymaker 1500 about 2 years ago the BB crank interface was the Truvativ powerspline pattern. In the first winter my left arm came loose when it was cold (-15*C or so). Since it ...
14
votes
7answers
24k views

How to remove a crank arm with stripped threads?

A friend called me up yesterday after a mis-adventure during his attempt at a bottom bracket overhaul. He stripped out the threads on the (left) crank arm while using a Park crank puller. In a pinch, ...
4
votes
3answers
3k views

Does anyone have experience with Bottom Bracket Tap/Facing sets?

I'm interested in recommending my boss get the workshop in which I work a bottom bracket tap and facing set. As it's quite an investment it's important to me to know what you're getting for your ...
2
votes
1answer
171 views

Triple to double crankset

I have a new road bike that has a triple crankset. But I wanted to try double on it. When I replaced it. I found out that my standard square tapered double cranks won't fit with the bike's frame. Can ...
1
vote
2answers
3k views

Mountain bike crankset chainring compatibility

I have a Shimano Deore LX crankset. I would like to replace the outer chainring. What manufacturer chainrings are compatible with my crankset ? My outer chainring takes all of the abuse, due to ...