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Old 01-13-06, 08:21 PM   #1
andrewchng
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Front D 28.6mm 31.8mm and 34.9mm

Hi, I wish to know how are these numbers derived?
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Old 01-13-06, 08:25 PM   #2
Wil Davis
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The numbers refer to the diameter (in mm) of the seat tube to which the clamp is attached. Is that the information you were looking for?

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Old 01-13-06, 09:20 PM   #3
Nubie
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Check the spec sheet for your bike, if you have it. If not, do what I did - take a piece of string and wrap it around your seat tube to find out the circumference (in mm). Divide the circumference by 3.14. Voila!

Cirumference = 2 x r x pi = diameter x pi

(And yes, I am a big dork)
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Old 01-14-06, 02:27 AM   #4
andrewchng
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yes it is. thanks alot.. now i know...
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