[Dynomite]

When you boys are talking gear ratios to determine vehicle speed.........you should use Tire Deflected Radius.....which by the way varies with tire rotation speed just a bit. And obviously varies with tire inflation pressure. Tire Deflected Radius is the distance from the center of the wheel to the pavement.

Tech Info - ZR1 Differential Gearing and Vehicle Speed Calculations

Some more Calculations for you as your interests vary

CALCULATION METHODS
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Gear calculator TIPS
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