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Thread: Tubing sizes?

  1. Tubing sizes?

    I'm building a frame based on the older Harley's, but not 100 percent sure on some tubing sizes. I'm using .120 wall 1020 Dom for everything, but I would like to be close to the o.d. sizings. I need to know the o.d. of...

    Seat tube
    Backbone
    Backbone support - I saw on the raceframe website that there are two sizes for the support, 7/8" and 1". Can someone tell me what's going on with that.

  2. #2

    Re: Tubing sizes?

    Seat tube, back bone od 1.5", brace changed from .875" to 1" in late 37.

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