[suicideneil]

I would have thought 3s was a bit slow, but for some applications you dont need as much speed I guess really.

Differential Ratio: 2.8461538461538462
Transmission Ratio: 1.83
Other Ratio: 1
Spur Tooth Count: 66
Pinion Tooth Count: 22
Total Voltage: 11.1
Motor KV: 2084
Tire Diameter (inches): 5.75
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0.0073
Spur/Pinion Ratio: 3 : 1
Total Ratio: 15.62538 : 1
Tire Circumference (inches): 18.06 inches (458.83mm)
Total Motor Speed: 23132.4 RPM
Vehicle Speed: 25.32 MPH (40.68km/h)
Effective Speed Rate: 2.28mph/V (3.66kmh/V)

22/66 on the pinion/spur with 3s lipo is really slow...

2.8461538461538462
Transmission Ratio: 1.83
Other Ratio: 1
Spur Tooth Count: 66
Pinion Tooth Count: 25
Total Voltage: 14.8
Motor KV: 2084
Tire Diameter (inches): 5.75
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor coil Ω: 0.0073
Spur/Pinion Ratio: 2.64 : 1
Total Ratio: 13.75034 : 1
Tire Circumference (inches): 18.06 inches (458.83mm)
Total Motor Speed: 30843.2 RPM
Vehicle Speed: 38.37 MPH (61.64km/h)
Effective Speed Rate: 2.59mph/V (4.16kmh/V)
Effective KV Value: 2084

But 25/66 & 4s is alot better.