Speed: Pedal Assist 20mph Throttle 20mph (Class 2) Motor: Sutto 350W 36V Brushless Motor Power: 350W Constant 500W Peak Pedal Assist: 5 Levels Range: 30-60 Miles Battery: Lithium-ion 36V, 13.2Ah, UL2271 Certified Lights: Integrated Head and Taillights Tires: Serfas Voltage 27.5 x 2.35 Handlebar: Aluminum Comfort Bar Frame: 6061 Aluminum Alloy, Frame Size: 18" , One Size Fits Most Brake: M320 Mechanical Disc with 160mm Rotors Shifter: Shimano 7 Speed Twist Shift Derailleur: Shimano Touring Stem: Adjustable Comfort Stem