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PostPosted: Thu Mar 14, 2013 2:39 am 

Joined: Sun Oct 02, 2011 7:52 pm
Posts: 17
Hey guys,

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!

PostPosted: Thu Mar 14, 2013 2:55 am 

Joined: Tue Sep 14, 2010 3:28 pm
Posts: 1405
Doesn't seem right. I think that may be a typo.

PostPosted: Thu Mar 14, 2013 3:00 am 

Joined: Sun Nov 04, 2012 11:36 am
Posts: 75
31.6 should fit perfectly. I've been using an FSA 31.6 K-Force seatpost for my supersix last year with no issues.


PostPosted: Thu Mar 14, 2013 3:09 am 

Joined: Mon Sep 17, 2012 10:53 pm
Posts: 585
If I'm not mistaken, 31.8 is the diameter of frame. 31.6 is the needed diameter of the seatpost.

PostPosted: Thu Mar 14, 2013 3:22 am 

Joined: Thu Jul 26, 2007 10:24 pm
Posts: 1579
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.


PostPosted: Thu Mar 14, 2013 7:35 am 
Shop Owner

Joined: Sat Jun 13, 2009 4:02 am
Posts: 1980
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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