kyosho buggy 7xl gear
 

i am about ready to chose some pinion gears and i dont know off hand what size the center diff is, could some body offer a good base line and i have read to gear for 45mph for suffient load on the motor, the buggy will be raced how fast should i gear for that 40 mph

40 mph seams to work well for most people for racing (me included). Center diff is most likely 46 teeth.

do you know what size pinion that would be about, i never can get that speed calculator to work for me

Differential Ratio: 3.3076923076923075
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 46
Pinion Tooth Count: 14
Total Voltage: 14.8
Motor KV: 2382
Tire Diameter (inches): 4.1
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0.0056
Spur/Pinion Ratio: 3.29 : 1
Total Ratio: 10.86813 : 1
Tire Circumference (inches): 12.88 inches (327.17 mm)
Total Motor Speed: 35253.6 RPM
Vehicle Speed: 39.57 mph (63.56 km/h)
Effective KV Value: 2382
KT constant: 0.57 oz-in/A
Motor Torque: Amperage not specified...
Final Torque: Amperage not specified...
Final Power: Amperage not specified...

wow thanks, i'll buy a 13,14,15 to start