Product Details Big Sur is a 26 x 4” fat tire all-terrain e-bike, equipped with a powerful 750W Bafang rear hub motor. A specially-designed big headlight, extra-large 203mm brake rotors, LG 21700 battery cells, and a full UL2849 certification make Big Sur one of the safest e-bikes on the market. Sporting a bigger 52T crankset for stability at speed and a custom AIMA Comfort XL seat, Big Sur provides riders with a remarkably comfortable and smooth riding experience. Specifications MODEL Big Sur MOTOR 750W, 48V Brushless Rear Hub Motor THROTTLE Throttle on Demand DISPLAY Color LCD, Smart Easy-to-Read Display with Backlight SPEED Up to 20 MPH Pedal Assist, 20 MPH Throttle BATTERY Removable Internal Lithium-ion 48V, 15Ah (720Wh) with LG M50LT 21700 cells REAR RACK MIK HD SENSOR Torque Sensor PEDAL ASSIST 5 PAS Levels CHARGER 48V 3 Amp Fast Charger, about 5 Hours to a Full Charge RANGE 30 to 60 Miles FRAME 6061 Single-Butted Aluminum Alloy Frame with Internal Battery WEIGHT 82 lbs. (Battery included) PEDALS 9/16" Alloy Platform FORK Suspension Fork, 80mm travel, lockout WEIGHT LIMIT 400 lbs. KICKSTAND Aluminum Alloy Kickstand CRANKSET 170mm w/ 52T Chainring SHIFTER Shimano 8 Speed CASSETTE 8 Speed, 11-34T BRAKES Tektro Hydraulic Disc Brakes, 203 mm Rotors CHAIN 130 Link, 8 Speed RIM Double Wall Aluminum Alloy SPOKES Black Stainless 12G Front / 12G Rear TUBES Butyl Rubber HUBS Front Aluminum Alloy Disc Hub TIRES 26" x 4" Puncture Resistant SADDLE AIMA Comfort, 280mm*270mm Saddle SEATPOST Aluminum Alloy, 30.4mm 2-Bolt Clamp STEM Threadless, 31.8mm, 7 Degree Rise, Ext 75mm SEAT CLAMP 34.9mm Quick Release HANDLEBARS Aluminum Alloy Double Wall, 31.8mm, 680mm HEADSET Sealed Bearing Headset GRIPS Ergonomic Comfort