The Electron Wheel contains a 250-watt DC planetary geared hub motor, a 24-volt/10.7-Ah/256-Wh lithium-ion battery pack, and sensors that determine if you're riding uphill, downhill or on flat ground. It also communicates wirelessly with an included crank-mounted pedal sensor, to keep track of your cadence.
Using an accompanying free app, you can select the amount of pedaling assistance you wish the wheel to provide, plus you can do things like checking its battery level and tracking your rides. The wheel's maximum pedal-assist speed is 20 mph (32 km/h) in North America, and 16 mph (25 km/h) in Europe, as per regional regulations. It has a stated range of 16 to 22 miles (26 to 35 km) when used for "normal pedaling," which roughly matched up with our test rides.
Installation proved to be fairly easy. The Electron went on more or less like a regular quick-release front wheel, with the extra step of placing its spring-loaded torsion arm against the front edge of the fork. This user-friendliness means that when the battery needs recharging, you don't have to drag the whole bike inside – just the front wheel.
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