steerer tube and handlebar size

mkviken
mkviken Posts: 217
edited December 2012 in Workshop
are standard size for road bars and fork steerer tube both 31.8mm?

im looking at a new stem but ive seen 28.6mm ones too

im pretty sure my bike will be a standard size.

thanks

Comments

  • desweller
    desweller Posts: 5,175
    The old standard was 25.4.

    The current most common size is 31.8.

    If you're unsure then measure your bars.
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  • andrew_s
    andrew_s Posts: 2,511
    It will depend on how old the bike is.

    The old road bar size is 26mm (previously 25.8-26.3 depending on brand). They are now mostly changed to 31.8.
    Flat bars were 25.4 and are now mostly changed to 31.8.

    The steerer tube used to be 1" (25.4), but most forks are now 1 1/8" (28.6). Aluminium or carbon forks are almost certainly 28.6, but steel forks may be either.

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