Dino Challenge No. 1 · 17 October 2026
Niki's top gear
Set by Niki Saura, answered with one calculator
Niki Saura has rolled the old single-seater out for a test day. Its engine revs to a limiter of 7,500 rpm, top gear is 0.82:1, the final drive is 3.9:1 and the rear tyres are 25 inches (635 mm) across.
On the long straight, with the engine on the limiter in top gear, how fast is the car going? Ignore tyre growth and slip, and assume the engine has the power to get there.
Hint. The Gear Ratio & Top Speed calculator in the Motorsport folder takes exactly these four numbers. Open the Gear Ratio & Top Speed calculator
The answer
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