E-system: SHIMANO DU-EP801 mid drive engine motors. Battery: Compatible with SHIMANO BT-E8036(630wh) and Darfon E4C0G(720Wh) Perfect for: All mountain riders. Rear Travel: 150mm. Rear Shock Size: 205*65mm (Up: 54*M10*P1.0, Down: 30*Φ10) Tires: Designed to work with 29*2.6" tire or 27.5*3.0" tire. Cable routing: All internal cable routing. Internal dropper post routing. Dropper post is 31.6 diameter. Material: High Modulus Carbon Fiber