Advertise on Bikeforums.net



User Tag List

Results 1 to 2 of 2
  1. #1
    Senior Member
    Join Date
    Jul 2010
    Posts
    142
    Mentioned
    0 Post(s)
    Tagged
    0 Thread(s)

    will 31.8mm stem work on 31.7mm bars?

    Hi. I need a shorter stem. My current stem is a Deda Big Logo 31.7mm. Replacement stems (Ritchie, Forte, Easton) all seems to be 31.8mm. Deda is not sold locally. Will 31.8mm work or am I stuck having to order a Deda? I would have thought that this would be standardized by now. Thanks.

  2. #2
    Senior Member
    Join Date
    Aug 2005
    Location
    Pittsburgh, PA
    My Bikes
    '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
    Posts
    26,178
    Mentioned
    14 Post(s)
    Tagged
    0 Thread(s)
    They are the same diameter. The "true" diameter is 1-1/4" or 31.75 mm. Most makers round the advertised diameter value up to 31.8 mm while Deda rounds down to 31.7 mm.

    I always thought this was both misleading and a bit dishonest as it makes you think you need to use their stem too and it's not any different.

Posting Permissions

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