Although this bike was purchased in the '90s, you can see it's in very good shape. All it really needs is a tune up, some air in the tires, and it's good to go. This bike is a hybrid, so it's not a full mountain bike, or a road bike, but can be used for either. It has 21 gears, Shimano components, and 27" tires. The seat, and the front tire are quick release hubs. The bike was formerly used by a 5' 6" female. The seat is adjustable. Both the front, and rear brakes are center-pull. The tires and tubes 1.5 years old.