This chart shows the performance of each electric bike kit system on the same bike on the same road with the same rider. The test begins at a complete stop, then full throttle is applied with no pedaling. Batteries UB12120, rider 140 lbs, level road, low wind, dry asphalt. The graph and the table below it show the speed (MPH) attained at intervals of one second from zero to the top speed. We believe this is more useful information than wattage since it shows actual power to the ground rather than power consumed. To calculate wattage, multiply volts times amps.

Range (distance per charge) depends on many factors including tire tread pattern, tire pressure, weight of rider, wind, hills, stop-and-go, rider driving habits. We expect 10-14 miles from the RoadRunner using 10AH batteries, no pedaling, regular city traffic, running as hard and fast as we can. Adding pedal power helps, particularly at start-up. An experienced rider willing to do some pedaling and keeping speed under 15 MPH may get more than 20 miles on a charge. As with a car, the faster you take-off and the faster you run, the more fuel per mile you will use.

NEW! For 48 volt systems, you can substitute the bag and rack for these battery racks. Just click the option box to make the substitution.
5-Speed, 7-Speed and 8-Speed freewheels are available for rear motors. If you want a 5-speed or 8-speed, order the 7-speed and make a note in the "Customer Instructions" line of your order.

$629.99
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$729.99
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$369.99
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$419.99
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