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Discuss light weight issues concerning road bikes & parts.
- Posts: 21
- Joined: Sun Oct 02, 2011 7:52 pm
I ordered a women's version of supersix last week and just found out that the seatpost dimension is listed as 31.8mm. Is it okay to use a 31.6mm seatpost? If not, is there any manufacturer that makes 31.8mm seatposts?
Thanks a lot!
- Posts: 1405
- Joined: Tue Sep 14, 2010 3:28 pm
Doesn't seem right. I think that may be a typo.
- Posts: 75
- Joined: Sun Nov 04, 2012 11:36 am
31.6 should fit perfectly. I've been using an FSA 31.6 K-Force seatpost for my supersix last year with no issues.
- Posts: 723
- Joined: Mon Sep 17, 2012 10:53 pm
If I'm not mistaken, 31.8 is the diameter of frame. 31.6 is the needed diameter of the seatpost.
- Posts: 1582
- Joined: Thu Jul 26, 2007 10:24 pm
- Location: Center of the Universe
I think the true size is 1.25", and different manufacturers call it 31.6 or 31.8. I think they are interchangeable.
- Shop Owner
- Posts: 1980
- Joined: Sat Jun 13, 2009 4:02 am
- Location: NoVA/DC
They are not interchangeable. It is a typo, supersixes are 31.6mm. Some seatpost clamps, front derailleur clamps, and of course handlebar diameters are 31.8mm, which is 1.25". The only bike I ever heard of actually taking a 31.8mm POST is an old Boulder Bicycles full suspension mountain bike, either the Gazelle or Defiant.
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