35-45km(100% electric energy) 55-65km(electric energy+feet assist). 500W brushless rear hub, maximum speed 38km/h.The removable 48V 13Ah battery offers a range of 35-45km in pure electric mode and 55-65km in assistance mode. The SW900 LCD display shows speed, gear, range and 5-phase assistance power. Binocular adjustable aluminum-alloy air suspension makes cycling more comfortable. Shimano 7-speed, you can shift to a larger cog for climbs and downshift to a smaller cog at higher speeds.