BionX SL 350 E-Bike KitAdvertisement BionX SL 350 E-Bike Kit E-bike conversion kit. 350W motor Top speed: 20mph Charge time: 4 hours Distance: 45-60 miles Wheel size: 20, 26, & 28 inches. Two different battery configurations. Price: $1399-1800 AdvertisementPublished: 05-28-2014 11:13:52 by POLITUSIC | Updated: 08-04-2017 07:03:50 Go To Article: Electric Scooters, E-Bikes, Electric Motorcycles Compared