The theoretical speed of Tamiya & XRay

Below you find the estimated theoretical speed, all calculations are done by using this website: http://www.easy-rc.com/cgi-bin/gearratios.cgi

Wheel diameter (mm): 60 (I used 60 as a worst case and not 62, 63, or 64)
Motor max speed (RPM): 35000 (I put this number as a worst case, the actual number is 12S * 3.7 * 1360rpm = 60384)

Tamiya TB Evo 5 results:
Final gear ratio: 1.5:1
Its roll-out is: 125 mm/revolution (4 inches/revolution)
Its maximum speed is: 263 km/hour (163 miles/hours)



XRay T2'008 results:
Final gear ratio: 0.68 (Pinion 150T)
Its roll-out is: 277 mm/revolution (10 inches/revolution)
Its maximum speed is: 582 km/hour (361 miles/hours)
LOL IT IS REALLY GONA FLY!!

Final gear ratio: 0.85 (Pinion 120T)
Its roll-out is: 221 mm/revolution (8 inches/revolution)
Its maximum speed is: 465 km/hour (289 miles/hours)

Final gear ratio: 1.02 (Pinion 100T)
Its roll-out is: 184 mm/revolution (7 inches/revolution)
Its maximum speed is: 388 km/hour (241 miles/hours)

I will measure the actual speed when I have a chance to run them after testing them (I know that it will take some time to reach the goal).