Currie Technologies Izip Mountain Trailz AL Mens Electric Bike Men's mountain bike with electric-powered motor for assist when you need it Motor reaches speeds of up to 15 MPH with range of between 15 to 20 miles PAS/TAG technology enables use with motor only or with motor assist power 7-speed geared system with Shimano rear derailleur; rack mounted SLA battery for easy swapping Weighs 63 pounds; 240-pound maximum user weight