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  1. #1
    mtbr member
    Join Date
    Jan 2009

    Sizing Question (Highball vs Alma)

    I currently have a SC Highball size Medium, which I love and fits me great (I'm 5'8" running a 100mm fork). I want to convert it into a singlespeed and dedicate another bike as a geared hardtail - the Orbea Alma 29er.

    I want the Alma to fit as close to the Highball, but the Alma in sizes Small and Medium are in between a Medium Highball. The chainstays are both short at 439mm, and the Highball is slacker by 1*. Below are the other #s (cm) for comparison...

    HB size M Alma Size S Alma Size M
    Top Tube 58.42 57.404 58.928
    Seat Tube 44.45 41.91 46.99
    Head Tube 9.906 10.922 11.43
    Head Tube* 70.5* 71.5* 71.5*
    Seat Tube* 73* 73* 73*
    BB Height 31.242 30.226 30.226
    Wheelbase 107.696 106 107
    Chainstay 43.942 43.942 43.942
    Standover 73.914 78.232 80.518

    Below are the differences to the Highball...

    HB size M Alma Size S Alma Size M
    Top Tube N/A -1.016 0.508
    Seat Tube N/A -2.54 2.54
    Head Tube N/A 1.016 1.524
    Head Tube* N/A 1.0* 1.0*
    Seat Tube* N/A Same Same
    BB Height N/A -1.016 -1.016
    Wheelbase N/A -1.696 -0.696
    Chainstay N/A Same Same
    Standover N/A 4.318 6.604

    I am leaning toward a Size S for the Alma, adding a setback seat post and a 90mm stem vs the 70mm on the Highball. Is that an appropriate approach? Will 1.7cm shorter wheelbase result in any negative attributes? First, I'll have to measure my toe to wheel gap on the Highball.

    I'd appreciate any advice. Thanks...

  2. #2
    mtbr member
    Join Date
    Jan 2009
    Attached is a better view of the #s... Sorry, couldn't figure out how to post in the text...
    Attached Files Attached Files

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