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Technical & Reference Section => Tech and Restoration => Topic started by: highrisedrifter on May 06, 2007, 02:37 PM

Title: Seatpost/seatclamp diameter
Post by: highrisedrifter 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

Title: Re: Seatpost/seatclamp diameter
Post by: Moose 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  ???

Title: Re: Seatpost/seatclamp diameter
Post by: highrisedrifter on May 06, 2007, 06:57 PM

Great, thanks.

I hoped it was something like that.

HRD

Title: Re: Seatpost/seatclamp diameter
Post by: thesku11s 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

Title: Re: Seatpost/seatclamp diameter
Post by: highrisedrifter on May 06, 2007, 09:56 PM

Quote from: thesku11s 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

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

HRD

Title: Re: Seatpost/seatclamp diameter
Post by: CD17 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  :(

(http://www.radbmx.co.uk/archive/albums/b366/claire169/Peregrine.jpg)

Title: Re: Seatpost/seatclamp diameter
Post by: highrisedrifter on May 06, 2007, 10:07 PM

Ah ok.

Thanks mate.

HRD

Title: Re: Seatpost/seatclamp diameter
Post by: Moose on May 06, 2007, 10:15 PM

Quote from: wish id kept my TA 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  :(

(http://www.radbmx.co.uk/archive/albums/b366/claire169/Peregrine.jpg)

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