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  1. #1
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    Bike sizing...does this sound right?

    I am looking at a 99 GT Avalanche and I know I have to ride to get a feel for it, but before making an appointment for a ride I wanted to check wrenchscience.com They are saying a 15"-16" for my build:

    Height :: 72in
    Sternum notch :: 60in
    Inseam length :: 31in
    Arm length :: 27in
    Shoulder width :: 17.50in
    Flexibility :: 7
    Weight :: 200 lbs
    Foot size :: 9 USMens

    Your Frame Size is :: 15in OR 16in Center-to-Top / 16in Center-to-Center

    Does this sound correct?

  2. #2
    ÖöÖöÖöÖöÖö Dannihilator's Avatar
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    You need a 17.5.
    Strike like an eagle and sacrifice the dove.
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  3. #3
    Junior Member
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    Can I ask what you base that on? Sorry I am a newbie...need the info...

  4. #4
    ÖöÖöÖöÖöÖö Dannihilator's Avatar
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    You're 6' tall, a 15"-16" frame is way too small. Riding a bike that is too big or too small can be bad for your knees. Try at 17 or a 17.5.

    Being a fellow 6' tall person, unless that frame is DJ geometry which is designed to be small, which this gt isn't, it's a xc bike. For example, my kona is a medium and it is a 15.5 but measures out to be a 17.5, My Rocky Mountain Vertex is a 17.5. Wrenchscience has screwed up measurements before, best way to get an accurate measurement is to go to a bikeshop to have them fit you for a bike in person.
    Strike like an eagle and sacrifice the dove.
    Words and Stuff.

  5. #5
    Canon fiend MadMan2k's Avatar
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    Nice avatar kona

    No, I don't have much to add to this thread. Except, I'm 5'11 and ride a 17" hardrock...

  6. #6
    likes to ride bikes
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    Hey kona wasent the Rocky Mountain vertex the bike for the canadian olympics mtb team in '96?

  7. #7
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    Kona, Madman

    Thanks for your replies...the bike is a 16" (Medium) and I actually have about a 30.5" inseam. Don't know if that changes anything.

  8. #8
    ÖöÖöÖöÖöÖö Dannihilator's Avatar
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    Quote Originally Posted by az fc fan
    Kona, Madman

    Thanks for your replies...the bike is a 16" (Medium) and I actually have about a 30.5" inseam. Don't know if that changes anything.
    Trust me on the 17" I'm a 31" inseam.
    Strike like an eagle and sacrifice the dove.
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  9. #9
    ÖöÖöÖöÖöÖö Dannihilator's Avatar
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    Quote Originally Posted by TroyLeeRacer199
    Hey kona wasent the Rocky Mountain vertex the bike for the canadian olympics mtb team in '96?
    That's when it originated, mine is obviously newer than that.
    Strike like an eagle and sacrifice the dove.
    Words and Stuff.

  10. #10
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    Hate to be a PITA, but where would the deficiency be in seat height (pedal stroke) or reach?

  11. #11
    ÖöÖöÖöÖöÖö Dannihilator's Avatar
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    You should have the saddle set to the point where it is level with the stem at least. You'll likely need 175mm crankarms for the bike. For stem length anywhere from 80mm to 100mm. With the stem it is personal preferance.
    Strike like an eagle and sacrifice the dove.
    Words and Stuff.

  12. #12
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    Kona,

    Do you mind if I send you a PM with the ad for the bike?

  13. #13
    ÖöÖöÖöÖöÖö Dannihilator's Avatar
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    Go ahead.
    Strike like an eagle and sacrifice the dove.
    Words and Stuff.

  14. #14
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    PM sent

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