The Serfas Dart represents affordable entry into the e-bike market while offering plentiful power, range, and comfort.- Pedal Assist 20mph- Throttle 20mph (Class 2)- Motor: 350W Nominal, 500W Peak, Brushless, Rear Hub Motor- Pedal Assist: 5 Levels- Range: 30 Miles- Battery: 36V Sustained, 11.6Ah Samsung 417.6Wh- Frame: Double-Butted 6061 Heat-Treated Aluminum Alloy- Tires: Kenda Kwick Seven.5 Sport 27.5 x 2.20 KS E-Bike 50- Handlebar: Aluminum, 31.8mm 15 Degree Sweptback- Saddle: Serfas City Bike 300- Brake: Tektro MD-M280 180mm Mechanical Disc Brake- Front Hub: Novatec 36H Disc, Nutted- Rim: Double Wall 36H Front and Rear, Disc Only- Shifter: Shimano 7S Altus Rapidfire, Shimano 7S Altus Rear Derailleur Specs Frame Double-Butted 6061 Heat-Treated Aluminum Alloy Rims Double Wall 36H Front and Rear, Disc Only Hubs Front: Novatec 36H Disc, NuttedRear: Rear Hub Motor Tires Kenda Kwick Seven.5 Sport 27.5 x 2.20" KS E-Bike 50 Shifters Shimano 7S Altus Rapidfire Rear Derailleur Shimano 7S Altus Brakes Tektro MD-M280, Mechanical Disc Brake, 180mm rotors Handlebars Aluminum, 31.8mm, 15 Degree Sweptback Saddle Serfas City Bike 300 Motor 350W Nominal, 500W Peak, Brushless, Rear Hub Motor, 20mph pedal assist, 20mph throttle, 30 miles range Battery 36V Sustained, 11.6Ah Samsung 417.6Wh