The 21-speed drivetrain and powerful linear-pull brakes to the mix and the Horizon confidently travels up or down any hill..with its upright riding position... Frame Garneau Hydro-aluminum 15 inch frame (best for 5’-5’6 height) Seat suspension.. New brake pads 6 weeks ago New tires 1 1/2 years ago 21 speed Trigger shifters Shimano tourney, shift/brake lever Great commuter bike,rides very smooth