[Jahay]

THanks for the responses... i see what you are saying now.

I used the speed calc, and these are my results.

Differential Ratio: 3.3076923076923075
Transmission Ratio: 2.215277777777778
Other Ratio: 1
Spur Tooth Count: 44
Pinion Tooth Count: 25
Total Voltage: 22.2
Motor KV: 1800
Tire Diameter (inches): 5.91
Tire Ballooning (inches): 0.5
Motor Current Draw: 0
Motor Coil Resistance: 0
Spur/Pinion Ratio: 1.76 : 1
Total Ratio: 12.89632 : 1
Tire Circumference (inches): 21.71 inches (551.39 mm)
Rollout: 1.68:1
Total Motor Speed: 39960 RPM
Vehicle Speed: 63.7 mph (102.32 km/h)
Effective KV Value: 1800
KT constant: 0.75 oz-in/A

As you can see on a 6s running 44/25 and accounting for tire ballooning at 0.5" i can hit 63mph supposedly... This setup doesnt include the 39t Idler which would probably give me up to 10mph more. Does this sound correct?