OwnerBrian Jackson
LocationTempe, Arizona US map
Web/EmailWebPage email image
Vehicle2000 Diamondback Mountain Bike
Motorunknown Unknown Series Wound DC
I believe that the motor is a 300W brushed series wound DC motor, but do not hold me to this. The motor has no markings, and I have not had it apart.
Drivetrain300W DC electric motor
Controller
on/off switch
Batteries2, 12.00 Volt, Lead-Acid, AGM
System Voltage24 Volts
Charger
The bicycle uses a single 24v 1.5 amp float charger. It is mounted above the motor. I purchased it from Batteries R Us for about $35.00
HeaterLong underwear, gloves, a jacket, and a ninja mask.
DC/DC Converter
None
Instrumentationon/off switch
led head and tail lights
Shimano Rapid Failure shifters
Top Speed30 MPH (48 KPH)
I can probably manage about 35mph or so in a sprint, but I probably cruise closer to 25mph. My smallest cog is a 12 tooth and my largest chain ring is a 42 tooth. With this combo, I can barely pedal fast enough. I would really like to switch the front chain ring to a 48 tooth or a 52 tooth.
AccelerationI can't really provide any accel figures, but I can say that I do about half of my accelerating by pedaling. Once I am ready to push the chain up into the big ring, I switch on the motor. As soon as the motor is on, I generally need to get into the smallest possible cog right away.
Range8 Miles (12 Kilometers)
As long as I do much of the accelerating, my range is about 8 miles. In fact, I can not recall a time that I managed less than 7 even while being very lazy.
Watt Hours/MileI haven't done these calculations, but I do know that riding this bike 22 miles per day, 5 days a week costs about $1.77 per month. My full size Dodge truck costs $360.00 per month.
EV Miles
Current:240 Miles (386 Kilometers)
 
    As of 2/19/2008
Seating Capacity1 or 2. I pull my son to and from school on his trailer bike.
Curb Weight50 Pounds (22 Kilograms)
I am only guessing.
TiresTioga Slicks
Conversion Time8 hours
Conversion Cost$75.00
Additional FeaturesThe motor and batteries came from a damaged EV Warrior bicycle. I fabricated the battery tray and the motor mount. The motor mount is designed in such a way that the motor's roller does not exert any force on the tire while the motor is off. This way, the rider does not need to pedal any harder than necessary. When the motor is switched on, its torque causes a hinge to unfold slightly and the roller presses against the tire.
I can hardly wait to build an EV with air conditioning and heat.

code by jerry