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  1. #1
    Ethan
    Join Date
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    univega tires/tubes?

    I recently just got another bike; a univega grantech aluminum. Im currently shopping for new tires and tubes for the bike, but being fairly new to the biking scene, im a bit confused on what size tubes i should get. My tires are supposed to be 700 x 23c, but when i went to the store they offered a 40mm valve and a 52mm valve. Im not sure which one im supposed to get... ANY HELP APPRECIATED!

  2. #2
    Senior Member
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    Longer valve stems are for aero rims, which you probably do not have.

  3. #3
    rebmeM roineS JanMM's Avatar
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    Jan 2006
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    Indiana
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    RANS V3, RANS V-Rex, RANS Screamer
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    You could take one of the original tubes to the store.
    RANS V3 (steel), RANS V-Rex, RANS Screamer

  4. #4
    Senior Member
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    Aug 2005
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    Pittsburgh, PA
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    '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
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    Valve stems are made in various lengths to fit rims with different sections. Shallow "box section" rims use a shorter stem than "deep section" aero rims. Unbless you have aero rims, the shorter stem will be the better one.

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