Seat Post Clamp Size
09-14-10, 08:38 AM
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Seat Post Clamp Size
Hello,
I am trying to find out the size of a seat post clamp for a Specialized Globe Sport. The tightening latch on mine broke so I need to replace the clamp. Do anyone know what size this particular bike uses?
I am trying to find out the size of a seat post clamp for a Specialized Globe Sport. The tightening latch on mine broke so I need to replace the clamp. Do anyone know what size this particular bike uses?
09-14-10, 09:14 AM
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Yeah that would be ideal, but I am about 200 miles away from the bike. 
I was about to place an order for one online and figured I'd ask if anyone happened to know. Guess i can just wait until I get home to measure it.
I was about to place an order for one online and figured I'd ask if anyone happened to know. Guess i can just wait until I get home to measure it.
09-14-10, 10:20 AM
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I've had two aluminum road frames with two different sizes of seatpost and binder. My '03 Raleigh Capri had a 27.2mm seatpost and took a 31.8 binder. It's replacement, an '08 Raleigh Grand Prix, takes a 31.6 seatpost and a 34.9 binder. Do you know offhand the seatpost diameter?
09-14-10, 10:21 AM
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Most modern seattubes are built to the following 3 sizes 28.6mm, 31.8mm, and 34.9mm. Take off your current clamp and see if there are any stampings inside.
09-14-10, 12:27 PM
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09-14-10, 12:29 PM
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31.8 is probably OK, If no shims are inserted to use a larger ID tube.
roughly a 2.3mm wall thickness tube.
you can always return / exchange if the guess is off..
roughly a 2.3mm wall thickness tube.
you can always return / exchange if the guess is off..
Last edited by fietsbob; 09-14-10 at 12:38 PM.
