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gbj_tester
I have a frame whose seatpost's OD is 36mm (31.6mm seatpost) but pitlock's seat post collars are wither too big or too small. This is the reply I got:
"Thanks for your inquiry.
The sizes of the seatpost collars we produce are the following:
28.6 mm (for seat tubes with a diameter of 27.0 - 28.6 mm)
31.8 mm (for seat tubes with a diameter of 30.2 - 31.8 mm)
34.9 mm (for seat tubes with a diameter of 33.3 - 34.9 mm)
34.9 mm -> 30.00 mm (clamp 34.9 mm with inner spacer / adapter)
40 mm (clamp 40.0 mm with a diameter of 38.5 - 40.0 mm)
As you can see, none of these will perfectly fit a 36mm diameter frame.
You could either use a 35mm collar and try to extend it to your seat post or put on a 40mm collar with an adapter ring. Unfortunately with both options we cannot guarantee neither a perfect fit nor the durability of the installation."
Which one would you suggest?