http://scriptasylum.com/rc_speed/
Differential Ratio: 3.909090909090909
Transmission Ratio: 1
Additional Ratio: 1
Spur Tooth Count: 52
Pinion Tooth Count: 11
Battery Voltage: 14.8
Motor KV: 2800
Tire Diameter (inches): 5.8
Top Speed (MPH): 38.6943 MPH
Differential Ratio: 3.909090909090909
Transmission Ratio: 1
Additional Ratio: 1
Spur Tooth Count: 52
Pinion Tooth Count: 13
Battery Voltage: 14.8
Motor KV: 2400
Tire Diameter (inches): 5.8
Top Speed (MPH): 39.1968 MPH
Mod 1 extra hardened and as this is mike's place I'd have to say RCMonster pinions...