Bike is a 21” Trek Shift 3. It is very comfortable, because the seat is nice and high quality plus the Handlebar system can be adjusted to put rider in comfortable positions. It was tuned at The Bike Shop in Temecula, and hasn’t been risen much since, so it’s tuned and ready to ride. I used it on paved trails, as I like to keep it clean. However, can be used on light mountain bike trails, gravel/dirt trails, and paved trails/roads. Great dependable bike. I am 6’ and it fit great.