Originally Posted by
Winfried
Good to know. If someone knows of a reliable piece of software…
Good idea. Does someone know how to translate tthat to the number of teeth reliably? I read Carbon Drive belts are 11mm between peaks.

inches x 25.4 / 11 is the raw math... not sure if that translates to actual tooth count reliably., but it will get you in the neighborhood.
i'd just use my Stanley "inches-or-mm" tape measure... available at your local hardware outlet. a VERY handy tool for a bicyclist.
test it on your bike as it sits now... see if it matches the existing belt's tooth count.