Speed Calculations

[Mozzy]

I posted this in the Speed Calc section too, but, didn't want to clutter it up if it got out of hand.

Does this seem right??
I have taken this data from when my CRT had the Neu 1515 2.5D F in it running 5S.

Input data:

Enter Front/Rear Differential Gear Ratio (?):3.30769230 Jammin CRT 43/13
Enter Transmission Gear Ratio (?):1 Direct drive or centre diff 1/1
Enter Additional Gear Ratio (?):1 Select preset other ratio
Enter Spur Gear tooth count (?):62 Truggy CRT (Mod 1)
Enter Pinion Gear tooth count (?):16
Enter total battery voltage (?):18.5v
Enter kv rating of brushless motor (?):1700
Enter tire diameter in inches (?):5.65 Crimefighter MTR 1/8 scale truck
Enter the added radius of tire
"ballooning" in inches (?):2 My standard radius is nearly 3. I didn't think this was correct.
Enter Current draw in amps (?):0
Enter motor resistance in Ω (?):0

Results:

Spur/Pinion Reduction Ratio (?): 3.88 : 1
Total Reduction Ratio (?): 12.81731 : 1
Tire Circumference (?): 30.32 inches (770.04 mm)
Rollout (?): 2.37:1
Total Motor Speed (?): 31450 RPM
Theoretical Maximum Vehicle Speed (?): 70.44 mph (113.16 km/h)
Calculated Loaded KV Value (?): 1700
Calculated KT Constant (?): 0.8 oz-in/A
Calculated Motor Torque (?): Amperage not specified...
Calculated Axle Torque (?): Amperage not specified...
Calculated Motor Power (?): Amperage not specified...

With 3 inch as my radius the Theoretical Maximum Vehicle Speed is: 85.04 mph (136.61 km/h)