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RoadRunner (Crystalyte Motor Model 408) electric bike kits are brushless, meaning the energy is transferred to the motor in a more sophisticated and efficient way. RoadRunner motors have no brushes to wear out, but brushes last a long time. The main advantage that the brushless motor is more efficient, meaning you get more miles per charge.  RoadRunner electric bike kit front motors are available on 16 inch, 20 inch, 24 inch and 26 inch wheels. Rear 7-speed and 8-speed wheels are available by special order. Dropout width is 100mm for front wheels and 135mm for rear wheels. The axle is 9mm in diameter. RoadRunner motors are 75 mm wide, extending 65 mm up the fork from the axle. Weight is 15.5 pounds laced to the rim. Dimensions

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. RANGE Chart   Sealed Lead Acid Battery (12 AH) LiFePO4 EV Battery (48V 20 AH) Weight 40 lbs 29.2 lbs Phoenix Racer 4840 Capacity 12AH 20AH Range 36 MPH 7-9 26 Range 20 MPH 18* 61   Weight 35 lbs 29.2 lbs   Capacity 10AH 20AH RoadRunner 4820 Range Full Throttle 14* 88* Sparrow 4825 Range Full Throttle 13* 80* * Estimated. We will perform and report road tests as we complete them. 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.
RoadRunner 3625 What's included? $629.99 Put in cart for shipping estimate 16 inch front motor Add $0.00 16 inch rear motor Add $30.00 Heavy-duty kickstand for 26 inch bikes $44.99 Cruise Control with brake inhibits $49.99 Substitute: Lighted Twist Throttle $0.00 Upgrade: Joule 36V 3A Charger $20.00 Upgrade: Joule 36V 4.5A Charger $70.00	RoadRunner 4825 What's included? $729.99 Put in cart for shipping estimate 16 inch front motor Add $0.00 16 inch rear motor Add $30.00 Heavy-duty kickstand for 26 inch bikes $44.99 Cruise Control with brake inhibits $49.99 Substitute: Lighted Twist Throttle $0.00 Upgrade: Soneil Charger $130.00 Substitute: Battery Brackets for bag $0.00 Simu-Leather Saddlebags $59.99
RoadRunner 3625 Power System Only What's included? $369.99 Put in cart for shipping estimate 16 inch front motor Add $0.00 16 inch rear motor Add $30.00 Heavy-duty kickstand for 26 inch bikes $44.99 Cruise Control with brake inhibits $49.99 Substitute: Lighted Twist Throttle $0.00	RoadRunner 4825 Power System Only What's included? $419.99 Put in cart for shipping estimate 16 inch front motor Add $0.00 16 inch rear motor Add $30.00 Heavy-duty kickstand for 26 inch bikes $44.99 Cruise Control with brake inhibits $49.99 Substitute: Lighted Twist Throttle $0.00

48 Volt Battery mounting options
Standard bag and basket	Steel battery hangers