What is headtube angle usually based on?- Mtbr.com
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  1. #1
    mtbr member
    Join Date
    Dec 2004

    What is headtube angle usually based on?

    If you look at the Switch on the Rocky Mountain website, you'll find that one version comes with a 170mm fork, and the other with a 150mm fork. Both however have the same amount of rear travel and, of course, the same headtube angle. I always thought headtube angle was based on a built-up bike with fork. Rocky Mountian obviously doesn't do it this way.

    How do companies typically determine a frame's headtube angle? Is there any way to standardize the criteria?

  2. #2
    Former Noob Herder
    Reputation: zedro's Avatar
    Join Date
    Jan 2004
    headtube angles are simply the angle of the headtube vs the ground fully built up. Either RM didnt correct their figures for the different models, or the framesets are actually different and corrected to the particular fork do have the same angle for each model.
    Quote Originally Posted by Gunslingger
    no doubt you must have majored in english or something rad!!!

  3. #3
    mtbr member
    Join Date
    Jan 2004
    This is a pretty common mistake...

    Quote Originally Posted by zedro
    Either RM didnt correct their figures for the different models

  4. #4
    Pro Crastinator
    Reputation: .WestCoastHucker.'s Avatar
    Join Date
    Jan 2004
    there are small hydro pumps at the top and bottom of the headtube that are scientifically designed to self-adjust to any terrain so the headtube is at a constant while the rest of the bike moves about......

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