I usually ride 15 to 18 miles because that's what I can get in after work in +/- an hour's time. On weekends, I push it further and try to get in 20 or 25 miles. I've done a couple of 50's and was pretty beat up afterwards, but nothing taking a shower and relaxing for a bit didn't fix. I know if I had a road bike I could make better time and cover more distance. I'm just wondering what kinda mileage is 'normal' for a 50+ (I'm 56) given the configurarion of the bike and what's going to be comfortable. Is it all about shape and conditioning, or is it unreasonable to think you can be comfortable on a hybrid for 3+ hours? What'cha think?