JOYSTAR 29" Electric Bike Conversion Kit 5.2AH

Electric Bike Conversion Kit for 29" Wheels

The JOYSTAR kit transforms a standard 29-inch bicycle into an electric assist machine using a steel motor wheel, a 5.2AH removable battery pack, a charger, throttle and LED display. It fits rims measuring 1.95 to 2.125 inches wide and accepts tires from 1.5 to 2.25 inches, covering mountain bikes, city commuters and beach cruisers. The double-wall aluminium rim works with both V-brakes and disc brakes so the original stopping hardware stays in place.

Riders who want a simple bolt-on upgrade

Cyclists needing a quick, tool-included installation and a preset 32 km/h limit for city legality will appreciate the three power modes and swappable battery design. Riders who want more storage capacity than a single 5.2AH pack provides, or who require integrated torque sensing and cadence detection, should look at something else. The kit also assumes the builder can supply a multi-wrench for final tightening.

Sustained assist with swappable power

Under continuous load the motor draws from the compact 5.2AH pack until depleted, then the rider swaps in a fresh pack in seconds to extend range without waiting for a recharge. The LED display maintains the chosen assist level while the double-wall rim dissipates braking heat during long descents. The steel construction handles repeated acceleration cycles, and the preset speed ceiling keeps output steady for regulation compliance over extended rides.