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Discussion Starter · #1 ·
I wish to order a Thudbuster seatpost for my 08 Wahoo Disc, but my LBS is closed for a couple of days for renos and I'm not sure what size the stock seatpost is. The frame is 17.5" not sure if that makes any difference.Any ideas?
Thanks:thumbsup:
 

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Check your post. The size should be stamped on it.

If not, Paper, pencil, and elementary geometry:
Take a piece of paper and wrap it around the tube. Then mark with a pencil where it overlaps. Flatten the paper and measure the length.

Then using some elementary geometry: Circumerence= Pi X Dia or Dia = Cir / Pi
Take your length (cir) and divide it by Pi (3.1415) and you'll have the diameter.
If your measurement is in inches, multiply that by 25.4 and you'll have it in millimeters
 
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