CROSSBIKE electric bike with 350w engine and 48v 10ah battery, with disc brakes, wheels 27.5 and 21 speeds. Features: frame: 19.5 inches (for height 170-185), aluminum engine: 350w Q100, inriner (with internal rotor) battery: Varicore 48V 10Ah controller: elifebike 500w 14A Charger: 48V 2A brakes: disc JMT-01, 160mm rotors gas handle: regular, full, motorcycle type fork: shock-absorbing 60mm rim: double aluminum '' 27 .5 steering: 1/8 * 44 * 30, integrated, threadless switches: shimano FD-TZ30, shimano RD-TZ50 monoblocks (coins) : Shimano ST-EF51, 21sp tires: 27.5 x 2.125