How does this work for 4WD? Do you just input the same info, such as ring and pinion for the diff, as you would a 2WD? I tried it using my Slash 4X4, and either i put something in wrong, or, it doesn't calculate for 4WD, because the result was that it would only do 9MPH. Another thing i noticed, it asks for motor KV, but, not motor size, and, i thought bigger motors had more torque and/or speed.Guys we've added an RC Vehicle Speed Calculator to the front page of RCTalk, with more tools hopefully to come.
https://www.rctalk.com/rc-tools/rc-car-speed-calculator/
Check it out and share your thoughts on anything that needs to be improved upon.
If you have any ideas for more calculators please let me know!