i came up with:

front/rear gear ratio: 3.3076923076923075
transmission gear ratio: 1.532258064516129
additional gear ratio: 1
spur gear tooth count: 52t
pinion gear tooth count: 18t
total battery voltage: 16.8v 2x 7cells
kv rating of motor: 2200kv
tire diameter: 7.0
tire ballooning: 1.0
current draw in amps: 120
motor resistance: 0.0003

and came up with 67mph??????howww????