E-system: Campatible with Bafang M620 motor. Battery: The internal battery is  BAFANG BT F38 (48V*20AH). Perfect for: Fat Ebike Riders. Rear Travel: 150mm. Rear Shock Size: 190*51mm Tires: Designed to work with 26"*4.8" fat tire. 190mm rear thru axle. Cable routing: All internal cable routing. Internal dropper post routing. Dropper post is 31.6 diameter. Material: High Modulus Carbon Fiber