Speed Calculator

[Bmr4life]

This will be my Jammin X2 CRT with a 2200kv on 4S.

Differential Ratio: 3.3076923076923075
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 48
Pinion Tooth Count: 14
Total Voltage: 14.8
Motor KV: 2200
Tire Diameter (inches): 5.65
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor Coil Resistance: 0.006
Spur/Pinion Ratio: 3.43 : 1
Total Ratio: 11.34066 : 1
Tire Circumference (inches): 17.75 inches (450.85 mm)
Rollout: 1.57:1
Total Motor Speed: 32560 RPM
Vehicle Speed: 48.26 mph (77.52 km/h)
Effective KV Value: 2200
KT constant: 0.61 oz-in/A
Motor Torque: Amperage not specified...
Final Torque: Amperage not specified...
Final Power: Amperage not specified...

[scarletboa]

Originally Posted by Bmr4life

This will be my Jammin X2 CRT with a 2200kv on 4S.

Differential Ratio: 3.3076923076923075
Transmission Ratio: 1
Other Ratio: 1
Spur Tooth Count: 48
Pinion Tooth Count: 14
Total Voltage: 14.8
Motor KV: 2200
Tire Diameter (inches): 5.65
Tire Ballooning (inches): 0
Motor Current Draw: 0
Motor Coil Resistance: 0.006
Spur/Pinion Ratio: 3.43 : 1
Total Ratio: 11.34066 : 1
Tire Circumference (inches): 17.75 inches (450.85 mm)
Rollout: 1.57:1
Total Motor Speed: 32560 RPM
Vehicle Speed: 48.26 mph (77.52 km/h)
Effective KV Value: 2200
KT constant: 0.61 oz-in/A
Motor Torque: Amperage not specified...
Final Torque: Amperage not specified...
Final Power: Amperage not specified...

I run a 15t pinion in my CRT x2 with that same motor and 4s lipo and It goes between 38 and 40mph. I think you might have made a mistake in the differential ratio.
Btw, the motor only gets up to 140f running in tall Grass in 80f ambient temps. For this truggy, 15/48 is the sweet spot.