Spitfire mixed wheel size geo questions.- Mtbr.com
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  1. #1
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    Spitfire mixed wheel size geo questions.

    Would anyone know how to calculate what happens to the geometry of the bike, if I were to go from my current 26" set up to a 27.5f/26r? I have my dropouts in the lowest setting.
    I'm currently on a medium 2014 Spitfire with a 140mm Pike 27.5", 46mm offset and a 532mm(I think) A2C.

  2. #2
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    Roughly speaking...

    You'll slacken the head- and seat-angle by just under half a degree. The handlebars will be about 1 cm higher, and the bb will be about 4mm higher.

  3. #3
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    Thanks, dude.

  4. #4
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    I ran 27.5F/26R on my 2014 for a season, with a 540mm axle-to-crown Revelation 150mm fork. I really liked the handling and quick feeling of the back end in switchbacks. 26" dropouts in the medium or low position, I can't remember.

    I now run 27.5 front and rear with 26" dropouts in the low position, plus a 10mm tall lower headset cup to slacken out the front end. Can't say if handling is better or worse!

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