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  1. #1
    Newbie
    Join Date
    Mar 2007
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    How do I decide frame size?

    I am receiving a trek 7200 from my credit card points and need to decide on a frame size. Been to a few bike shops around town and have test rode a 17" that seemed to fit and ride okay, but felt a little cramped when standing to pedal. I don't really know what to look for. Someone told me today that a 20" is probably better because I have a long torso, even though my legs and arms are short, and I sat on one that felt okay, but I never rode it. I see that most of the parts are adjustable, but what are the main tradeoffs for getting a bike too big/small. I seem to be right in the middle. I'm 5'9". Are there any surefire signs that the bike I'm getting is too big/small?

  2. #2
    Accuracy is Speed
    Join Date
    Apr 2007
    Location
    Huntington Beach, CA
    My Bikes
    2007 Bianchi 928 C2C w/ Ultegra compact
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    If you want something close to "accurate", a shop will have to measure your arm length, torso length, and inseam and then you'll get a bike size that will fit "90% of the population" with your measurements.

    Once you have the correct frame size, most people say that adjustments in the seat and stem length should get you comfortable.

    Most shops charge a small fee for such a fitting, and I'm sure it's negotiable too.

  3. #3
    Senior Member
    Join Date
    Mar 2007
    Location
    central AZ Prescott Valley
    My Bikes
    Giant Simple 7
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    Have you looked at this site on bike fit:
    http://bicycling.about.com/gi/dynami...eFit/index.cfm
    It talks about how to measure inseam, reach (arm length), etc.
    Also this site for beginners is nice:
    http://bicycling.about.com/od/beginn...ng_Cycling.htm

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