I am sooooooooo slow. I get passed by everyone. The only people I can pass are the runners. On a 40 mile ride my average is about 13.3. I can get up in the 20s on flats ,but my average is always 13 something no matter how hard I try. I just smile when I get passed. I keep my tires up to 115-120. I know with my weight I should probably drop the pressure ,but I like the bumps. My tires call for 120 max.