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Old 09-03-05, 01:20 PM   #1
way mars
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seat tube diameter

what is the outside seat tube diameter of a cannondale xs800 inside is 27.2 thank you ...wayne
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Old 09-03-05, 01:36 PM   #2
wetjett01
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just add the tube material thickness twice the the ID to get the OD
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Old 09-03-05, 01:42 PM   #3
way mars
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thanks wettjett01 that would work if i new the thickness
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Old 09-03-05, 01:44 PM   #4
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Why do you need to know the OD of the tube?
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Old 09-03-05, 01:51 PM   #5
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^^^...isn't it usually to pick correct FD clamp size?
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Old 09-03-05, 01:54 PM   #6
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^^^...isn't it usually to pick correct FD clamp size?
Nice one. I didn't think of that.

Here's one way: Take some string, wrap it around the seatube, measure cirumference. Divide by 3.14 to get diameter.

Or find/buy/borrow a caliper.

Taking it to a LBS would also be very easy.
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Old 09-03-05, 02:25 PM   #7
way mars
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yes the outside of the seat tube BostonFixed and your right sydney
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