Date: Tue, 7 Sep 2004 12:53:58 -0700

Author: Eric Ayars

Subject: Re: bike wheel

Post:


On Sep 7, 2004, at 11:53 AM, sampere wrote:

> Cliff and I have been discussing this off-line for a few weeks now.
> Anyway, the threads on the crank arm are right handed on the drive
> side and left handed on the non-drive side. So we've been discussing
> this. If you want to think about this, it's done so that each side
> gets tightened as you pedal. Assume that the bearings do not seize
> up.

I'm gonna object on this one. You have the handedness right --I just
checked it on my bike-- but if they're right-hand thread on the
right-hand side, and vice-versa, the pedals will LOOSEN while pedaling
forward with seized bearings.

Try it. Holding a pedal-wrench on the pedal spindle, you spin the
cranks forward to remove the pedal and backwards to install. Either
side.

-----------------------------------------------------------------
Dr. Eric Ayars
Assistant Professor of Physics
California State University, Chico
ayars@mailaps.org
From dimarco@physics.montana.edu Tue Sep 7 15:44:55 2004

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