How do I find the right Seatclamp size for me?

Version 1:

Dismantle your existing saddle clamp and measure the outer diameter. To do this, loosen the clamping screw on your saddle clamp and pull it upwards. Now you can measure the outer diameter of the clamping surface on which the saddle clamp sits or the inner diameter of the dismantled saddle clamp.

We recommend using a caliper for good measuring results. Check beforehand whether the diameter is printed on the seat clamp; this can save you having to measure. Deviations of +/- 0.3 mm in the clamp diameter are normal. (Example: Your seat clamp says 35 mm -> a 34.9 mm seat clamp will still fit).

Version 2: 

Check the data sheet for your bike frame. This always states the seat post diameter and usually also the clamping diameter for seat clamps. Sometimes only the seat post diameter is given, but this does not provide any information about the clamping diameter of the seat clamp. In this case, proceed as explained in option 1.