50 yrs old. 6'2", 198 lbs. Mostly ride 70% road/30% gravel trails, flat bar hybrid (Trek 8.4 DS) w/ bar-ends, or a 1990 Specialized Stumpjumper w/ bar-ends. Both bikes not too upright as I still like to be somewhat aero. Semi-slicks on both bikes (700x40; 26x1.85). Usually do 20 miles every Sat/Sun, 12 mo/yr. After a 10 yr road racing career ('87-'97), no problems w/ the speed difference from now and then. Almost all of my rides are a brisk pace, as I ride for fitness, health, and weight maintenance. No problems w/ comfort at those distances. Love the flat bars...as long as they're with bar-ends for out-of-the-saddle climbing!