Will be 82 in less than a month and i am three months from my knee replacement today so i went out on this 88 Cannondale i had never ridden. Picked it up six months ago as a shed find. Under Thirty years of dirt and oil it was close to mint. Had to adjust seat and tighten shifting cable to get it into big gear. As soon as i did that i got up the hill that starts at our parking lot. 10% for 1/4 mile. Never did bother my knee. Ridding is easer than walking with out cane.
Ed