FORMULAS:
Tire Height = Wheel Diameter + (2 x (Section Width / 25.4) X (Aspect Ratio / 100))

Rollout = Tire Height X PI

Wheel Rpm = (Vehicle Speed / 60) X (5280 / (Rollout / 12))

Engine Rpm = Wheel Rpm x Rear Gear Ratio x Transmission Gear Ratio

EXAMPLE TIRE SIZE: 100/90-18

OLD TIRE SIZING: 3.25-19 or 4.00-18


Tire Spec: / -

Motor Spec:
RPM

Gear Sizes:
Front Teeth
Back Teeth
    
Coefficient of drag Cd
Frontal area in sq/ft A
Rolling resistance factorCr
Wind Factor Crw
Vehicle weight in lb W
Angle of incline in deg.
Wind Speed


Sidewall Width      Angle of incline force (lbs)
Tire Height Rolling resistance (lbs)
Rollout
Gear Ratio
Max mph