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Colnago C-40 seat post clamp diameter(4 posts)

Colnago C-40 seat post clamp diameterthdrk1
Oct 11, 2002 1:40 PM
After messing around several times trying to get my seat height right I managed to strip the threads on the clamp.
I tried to find another barrel nut, but no one has them in that small size. Besides sending away for a very expensive Colnago seat post clamp does anyone know the diameter of the seat tube insertion point so I could get another brand to replace it. I am away from home right now and can not measure it myself. Help!!!!
re: Colnago C-40 seat post clamp diameterKen
Oct 12, 2002 5:55 AM
As I remember the seat clamp size is a very common size (31.6?) readily available at your LBS. I once had to use a non C40 seat clamp because the bolt nut got lost.
32.2mm...C-40
Oct 12, 2002 7:11 AM
Mine measures 1.268 inches or 32.2mm. 31.8mm would be a standard 1.250 inch size. Perhaps a 31.8mm can be squeezed on, but it won't be a perfect fit.
Thanks for your timethdrk1
Oct 13, 2002 10:24 AM
Thank you C-40 and Ken. I am back home now and I will try a 32mm Campagnolo seatpost clamp.