I weigh 209 pounds , average 175 miles a week. I ride 90% on a bike path. Last year for the 10 months I rode over 4000 miles. I never transport my bike . I leave from the house. I'm riding on Conti gatorskins with 100 psi . Ps. I air my tires before every ride. All 3 bikes are Giants, and have Giant/Shimano wheels. I don't think I'm hard it my stuff, but I'm aggressive I average 20 mph, for 20 miles. My longest ride was 84 miles. I really appreciate ALL THE FEEDBACK . Thanks to everyone who has replied