What's geometry all about?

richprag
richprag Posts: 24
edited July 2008 in MTB beginners
basically my question is the topic title. I was looking at the spec for a marin rocky ridge and it says its got 'trail geometry'. What does this mean? I noticed it had more of a sloping top tube.....

Also what does 'slack' geometry mean?
Famous Friend and Fashion Drunk

Comments

  • Georgeb
    Georgeb Posts: 315
    I think that trail geometry means that the geometry is sutd to trail riding. Geometry is the angle and lenths of the frame. Someone correct me if im wrong.
    [url=http://www.flickr.com/photos/16262159@N02/2343081823/DMR Sidekick
  • nicklouse
    nicklouse Posts: 50,673
    head tube angle vertical (zero) is steep/sharp.... headtube angle horizontal (90) is Slack.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • richprag
    richprag Posts: 24
    ah thanks guys, so i'm guessing that trail geometry is more on the sack side (i'm guessing this because the marin has long forks...)?
    Famous Friend and Fashion Drunk
  • nicklouse
    nicklouse Posts: 50,673
    Well it all depends on how they measure it.

    in that the longer the fork the slacker the angles. BUT as the fork compresses the angles do not want to get too steep.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown

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