I used this belt on a stump grinder with a modified 13hp honda running at max rpm.. the belt would last between 3 and 6 months before it was stretched to the maximum adjustment. Compared to the oem belt that lasted for about 4 years this one had to be adjusted often especially when new or it would eat the belt. It is one of the better belts that I have tried using. I believe my application is extreme duty and I plan to get ahold of someone at the v-belt guys and see what they recommend for my special situation?