EZIP MTN Trailz Electric Mountain Bike (26-Inch Wheels) Mountain bike with electric-powered motor for assist when you need it 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 Get between 15 and 22 miles of range, with speeds up to 18 miles per hour For ages 13 and up; 240-pound maximum user weight