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RADBMX.CO.UK  |  Technical & Reference Section  |  Tech and Restoration  |  Seatpost/seatclamp diameter
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Author Topic: Seatpost/seatclamp diameter  (Read 838 times)

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highrisedrifter

  • Guest
Seatpost/seatclamp diameter
« on: May 06, 2007, 02:37 PM »
Please forgive my ignorance but BITD, if i wanted a new seatpost or clamp, I went out and bought one and didn't worry about the diameter of the tube.

I know there are 22.2mm (7/8") clamps and 1 1/8" clamps too.

What bike fits what size clamp, please? Is it always the way that an OS bike will have a 22.2mm clamp, or did some manufactureres opt for a specific size for all their bikes?

This will really help me as I'm trying to build up three f&f at the moment (Master, Streetbeat and Pro Performer) and I can't find my bloody tape measure.  :D

Thanks

HRD

Offline Moose

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Re: Seatpost/seatclamp diameter
« Reply #1 on: May 06, 2007, 05:48 PM »
Old school seatposts are 7/8" (22.2mm), the clamps are 1" (25.4mm).

Most new school seatposts are 1" (25.4mm) and the clamps are 1 1/8" (28.575mm)

I think that's about right  ???

highrisedrifter

  • Guest
Re: Seatpost/seatclamp diameter
« Reply #2 on: May 06, 2007, 06:57 PM »
Great, thanks.

I hoped it was something like that.

HRD

thesku11s

  • Guest
Re: Seatpost/seatclamp diameter
« Reply #3 on: May 06, 2007, 07:54 PM »
get yourself a vernier caliper, you wont regret it.

ones with a digital display only £10 on ebay

highrisedrifter

  • Guest
Re: Seatpost/seatclamp diameter
« Reply #4 on: May 06, 2007, 09:56 PM »
get yourself a vernier caliper, you wont regret it.

ones with a digital display only £10 on ebay

I have absolutely no idea what one of those is.   :) I shall do some research.  :daumenhoch:

HRD

Offline CD17

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Re: Seatpost/seatclamp diameter
« Reply #5 on: May 06, 2007, 10:01 PM »
This is a Vernier caliper, but don't get a digital one, cos when you go to use it, the battery has gone  :(


highrisedrifter

  • Guest
Re: Seatpost/seatclamp diameter
« Reply #6 on: May 06, 2007, 10:07 PM »
Ah ok.

Thanks mate.

HRD

Offline Moose

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Re: Seatpost/seatclamp diameter
« Reply #7 on: May 06, 2007, 10:15 PM »
This is a Vernier caliper, but don't get a digital one, cos when you go to use it, the battery has gone  :(



That picture came in handy afterall  :daumenhoch: :LolLolLolLol:

RADBMX.CO.UK  |  Technical & Reference Section  |  Tech and Restoration  |  Seatpost/seatclamp diameter
 

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