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 Crankset help!

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WhatACatchDonny
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PostSubject: Crankset help!   5/31/2010, 7:58 am

Hey guys, I need a little lesson on cranksets/arms.

Basically, I was going to try to salvage the crankset that was on the bike, since I'm on a budget. Long story short, I was riding the other day and the pedal straight up fell out of the arm. I had to stop and find it. When I looked in where the pedal used to be attached I realized it was so stripped it wasn't even funny. So I'm scouring ebay for a cheap crank.

If i'm planning on getting a new bottom bracket anyways, how can I tell if the crankset I buy is going to fit? Will I just have a compatible bottom bracket installed? Are there any instances where a crankset won't be compatible with my old road frame?
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DirtyBobbysBikes
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PostSubject: Re: Crankset help!   6/1/2010, 4:24 am

Most crank arms are designed to work with a certain length spindle.
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andr3
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PostSubject: Re: Crankset help!   6/6/2010, 5:03 am

The spindle length depends on the bcd of you cranks. Bigger bcd = longer spindle.

You should most likely go with a 130 bcd crank set becauseit would be cheaper and you could go w/ a 103mm-105mm bb.

Bcd if you don't know is the diameter of the 5 bolts on your chain ring.
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PostSubject: Re: Crankset help!   6/7/2010, 1:45 am

andr3 wrote:
The spindle length depends on the bcd of you cranks. Bigger bcd = longer spindle.

You should most likely go with a 130 bcd crank set becauseit would be cheaper and you could go w/ a 103mm-105mm bb.

Bcd if you don't know is the diameter of the 5 bolts on your chain ring.

MIA? haha
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DirtyBobbysBikes
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PostSubject: Re: Crankset help!   6/7/2010, 7:01 am

andr3 wrote:
The spindle length depends on the bcd of you cranks. Bigger bcd = longer spindle.

You should most likely go with a 130 bcd crank set becauseit would be cheaper and you could go w/ a 103mm-105mm bb.


This is not true.
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fyrmdk
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PostSubject: Re: Crankset help!   6/12/2010, 4:27 am

You should find out what length spindle is needed for your new cranks, then find the appropriate bottom bracket
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