LXI Flow i/O 6061 alloy comfort frame with full-integrated battery downtube. Easy rolling 27.5" tires, Shimano hydraulic disc brakes, suspension seat post and an adjustable angle stem team up with a powerful Shimano E5000 mid-motor powerplant. The system utilizes a 36v 504w LI-ION battery and delivers an estimated 30+ miles of range. Full recharge time is just 4 hours.