I'll be 58 in less than 3 months. I'm a leggy 5' 11", around 190 lbs. My bike weighs about 19 lbs. ready to ride, but without bag or bottles.

Tonight I rode with a group for 35+ miles at about 21 mph average (my computer said 20.9, another guy's read 21). No real climbing on that ride but lots of rolling hills. There were 16 of us, all taking turns at pulling. Temperature was about 90 degrees when we started.