Boardman Pro HT Seat Clamp size

GrantyBoy Posts: 166
edited April 2010 in MTB buying advice
Need a new seat clamp for my Chris Boardman Pro HT so I can adjust the saddle height quicker.
Does anyone know what size of seat clamp the frame takes? I've had a look on the Boardman bikes website but no luck. Seat post is a 27.2mm if that helps?!?


  • godin
    godin Posts: 17
    The 08 is 34 mm (stamped on the bottom of the clamp). You want a 31.9 (?) size qr.

  • papasmurf.
    papasmurf. Posts: 2,382
    I presume if the seat post is 27.2 you'll need a 28.6 clamp...
  • godin
    godin Posts: 17
    You have to look at the seat tube diameter. There are only a few seat clamp sizes, so get the closest one smaller than the seat tube size.

  • memphis32
    memphis32 Posts: 55
    Just to lose all ambiguity for anyone else, like me, who has searched for this answer:

    The front derailleur clamp says 31.8 on it, and a 34.9 seat clamp is far too big (got one of those before I checked the derailleur!)
  • Should need a 31.8 seatpost clamp QR then - it's the same tube.
    There is a time to surf and a time to wax your board.....

    '09 Trek Remedy 8
  • AntG
    AntG Posts: 72
    I asked this same Q at the w/e regards the Hope QR for my new Giant Trance X3.

    I just measured the diameter of the clamp already on the bike?....
  • memphis32
    memphis32 Posts: 55
    Well, yeah, but I never have a ruler with me when fettling in the shed...
  • just found this topic and need to know the definite answer!

    is a 31.8mm clamp the right size?

  • frogstomp
    frogstomp Posts: 412
    Hope 31.8QR fitted my Pro HT just fine..
  • sweet cheers