Thread: O-hauling neighbor's old 3 speed...

And I find that at some point in the distant past, somebody managed to screw the left pedal on the right side and the right on the left. Old BMX style 1-piece cranks, and they managed to get the pedals halfway on despite the fact that they were threaded in the opposite direction. Does anybody know what thread those old cranks are? I seem to remember 9/16" and 1/2" nominal sizes... anybody know the TPI on those? I figure I'll drill 'em out and helicoil them.

Thanks!
Justin

If your bike uses old American-style one-piece cranks, you need the 1/2" x 20 thread size.

http://www.sheldonbrown.com/harris/pedals.html


http://www.sheldonbrown.com/opc.html

Sweet, I can track one of those down at work.

Been taping some #00-90 holes at work... that was a first.

J

Nice. Did the Helicoils work?

Originally Posted by TXRAiDR

Nice. Did the Helicoils work?

Arg... put in somewhere around 75 - 80 hours last week. All other projects ground to a halt

'aight... helicoils and possibly even just chasing these threads are out because A) Left hand taps aren't as easy to come up with and B) I can't get the right pedal off anyway.

So... anybody have an old 170 mm single piece crank laying around? Anybody know what the issues are as far as will just any old single piece crank work, or were the BB threads spec'd differently on different cranks?

T.I.A.

Originally Posted by Coolhand

'aight... helicoils and possibly even just chasing these threads are out because A) Left hand taps aren't as easy to come up with and B) I can't get the right pedal off anyway.

So... anybody have an old 170 mm single piece crank laying around? Anybody know what the issues are as far as will just any old single piece crank work, or were the BB threads spec'd differently on different cranks?

T.I.A.

I know that Spin City Cycles has a fair # of single piece cranks laying in their parts bins, you might want to give them a call (620 just west of Anderson Mill area).

Schweet.