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Questions tagged [cottered-cranks]

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3 votes
1 answer
815 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!
Yitz Friedman's user avatar
2 votes
1 answer
128 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 ...
bomby's user avatar
  • 21
3 votes
2 answers
196 views

Cottered bottom bracket axle damage

I picked up a nice vintage bike, the kind that still uses cottered cranks. The left crank was loose when I got it, and the pin is completely toast. Replacements are available and very inexpensive, and ...
jayded-bee's user avatar
7 votes
1 answer
225 views

Lubricate cotter pin taper? Why or why not?

The main source material I've used as a guide for cotter pin related matters is Barnetts, which sticks hard to its recommendation to fully degrease cotter pin taper surfaces and their spindle mating ...
Nathan Knutson's user avatar
1 vote
1 answer
73 views

Standing on cottered crank scuffs bearings?

I have single speed road bike, with cottered crank and my caged bearings wear out too often, could it be due to me standing on the crank (like elliptical trainer) pretty often e.g. when i need to go ...
LilBro's user avatar
  • 564
2 votes
0 answers
349 views

Cottered crank dimensions

I'm interested in the design of cottered cranks. The cotter-pin joint as seen in vintage bicycles is not a very widespread type of joint in modern times, so it's hard to find information about this in ...
BetterSense's user avatar
  • 3,406