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Razor Ground Force Gear Ratio and motor shaft
ESP Support
said
almost 8 years ago
The Razor Ground Force rear axle shaft diameter is 20mm. It has a 3.09:1 gear ratio and a top speed of 12 miles per hour.
The Ground Force's gear ratio is suitable for a vehicle with a 250 Watt 2500 RPM motor and 5 inch diameter tires. It looks like the tires on your kart are larger than 5 inches though so a lower gear ratio might be needed for it.
If you are going to use a 250 Watt motor then as long as the kart will be driven on primarily flat surfaces 12 mph is a good top speed to aim for when making a gear ratio calculation. We have a gear ratio calculator designed for small electric vehicles with chain drive at this link: http://www.electricscooterparts.com/motorwheelgearratio.html
By the way we like the body you are building. It looks like crossover between a Firebird Trans Am, Porsche 918 Spyder, and Formula One race car.
Please let us know if you have any question.
The Ground Force's gear ratio is suitable for a vehicle with a 250 Watt 2500 RPM motor and 5 inch diameter tires. It looks like the tires on your kart are larger than 5 inches though so a lower gear ratio might be needed for it.
If you are going to use a 250 Watt motor then as long as the kart will be driven on primarily flat surfaces 12 mph is a good top speed to aim for when making a gear ratio calculation. We have a gear ratio calculator designed for small electric vehicles with chain drive at this link: http://www.electricscooterparts.com/motorwheelgearratio.html
By the way we like the body you are building. It looks like crossover between a Firebird Trans Am, Porsche 918 Spyder, and Formula One race car.
Please let us know if you have any question.
Grupp
Hello,
I built a kart based on a Kettler pedal car. I am thinking of switching my motor to the Razor Ground Force. Can someone tell me:
a)What is the stock gear ratio on a Razor Ground Force?
b)What is the shaft diameter?
I would probably try to mount one of my metric sprockets on the Razor motor, since i can't chance the sprocket on the drive shaft.
THanks,
Dan
ps - photo attached. Body almost done Bondo-ing.