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

  1. #1
    MoJo Mother Superior Coolhand's Avatar
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    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

  2. #2
    Just along for the ride Wumpus's Avatar
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    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
    "No bike does everything perfectly. In fact, no bike does anything until someone gets on it to ride."

  3. #3
    MoJo Mother Superior Coolhand's Avatar
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    Sweet, I can track one of those down at work.

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

    J

  4. #4
    Mojo Road Warrior TXRAiDR's Avatar
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    Nice. Did the Helicoils work?
    "As long as I breathe, I attack"-Bernard Hinault
    I've got more skill on two wheels than the majority of people have on two legs.

  5. #5
    MoJo Mother Superior Coolhand's Avatar
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    Quote Originally Posted by TXRAiDR View Post
    Nice. Did the Helicoils work?
    Arg... put in somewhere around 75 - 80 hours last week. All other projects ground to a halt

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    MoJo Mother Superior Coolhand's Avatar
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    '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.

  7. #7
    Speeder of the Single
    MoJo SuppoRteR
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    Quote Originally Posted by Coolhand View Post
    '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).
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  8. #8
    MoJo Mother Superior Coolhand's Avatar
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    Schweet.

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