road bike handlebar diameter vs. road bike diameter
Results 1 to 3 of 3
  1. #1

    Reputation:
    Join Date
    Aug 2004
    Posts
    25

    road bike handlebar diameter vs. road bike diameter

    Ok, this might sound strange, but I like bullhorn bars and I've found none that meet my liking. I'd like to cut down a set of road bars so I have a set of bullhorns that meet my fit desire but I want to make sure my shifters will fit. I have a flat bar on my MTB now that is 31.8 clamp diameter but what, exactly, is the diameter of the tubing on road and mountain bike bars? Are they both 25.4mm?

  2. #2
    RoadBikeReview Member
    Reputation: avm247's Avatar
    Join Date
    Aug 2006
    Posts
    70
    25.4mm clamp diameter has been used on Road (drop) and Mountain (flat) bike bars.
    26.0mm clamp diameter is/was a Road (drop) standard.
    31.8mm oversize diameter seems to be the new Road and Mountain bar clamp diameter standard.

    From what I recall, drop bar tube diameter is typically 15/16" or 23.8mm; flat (mountain) bar tube diameters are 7/8" or 22.2mm. There is a difference.

    Some links:
    http://www.sheldonbrown.com/harris/h...handlebarsdrop
    http://www.sheldonbrown.com/handsup.html (scroll down to Stem/Handlebar Compatibility)

    What kind of shifters are you looking at using? brakes?

    If you have bar end shifters (or want to use bar end shifters) you might consider Paul Thumbies which make thumbies (mounts) for both Road and Mountain bar widths.
    http://www.paulcomp.com/thumbshifters.html
    Last edited by avm247; 07-22-2009 at 02:12 PM.

  3. #3

    Reputation:
    Join Date
    Aug 2004
    Posts
    25
    Thanks... I've realized that I probably can't get wide enough so I'll have to figure something out. Thanks!

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •  

THE SITE

ABOUT ROADBIKEREVIEW

VISIT US AT

© Copyright 2019 VerticalScope Inc. All rights reserved.