QPD is rebuilding their website QPD site , but they used to have the ratios (number of teeth front/rear) posted. I can get the numbers off my belt later, I do rememeber it is a 28.5mm pitch between the teeth though (using the Goodyear Blackhawk belts) , and 135 teeth if I rerember correctly, but I'll get the info later and post what I have.

A word to the wise is not necessary. It is the stupid ones who need the advice. Pat