its simple math- child.
I used to have a micro. Tell me then, what is the Exact diameter of the tires?
Another calculation determines that 21,724 rpm of the tires means the car is traveling at 48.5 mph.
Thats 21,724 rpm TIMES 2.35 inches per revolution. So, in one minute the car will travel 51,051 inches (63,360 in a mile) So, dived 51,051 by 63,360 to achieve a ratio of the hour which equals .805. Multiply .805 times 60 minutes to determine the acctual speed of the model: 48 MPH
Oh look. I listen about as well as you do.