As a heavier rider, I will never waste my money on a Specialized race style tire again. I used the S-Works Mondo. Sucker didn't last 800 miles. Fine on smooth paved trail but after the first mountain climb (40 miles, 30-40 mph descents) it was toast at the bottom of the hill. 3-4 inch rubber on the tread was missing. I've seen simlar issues in other threads so it's not just my experience.