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How to Calculate Engine RPM vs. Gear Ratio - Roadkill Extra

It’s time for more math class with David Freiburger on this episode of Roadkill Extra. You’ll learn how to calculate the change in engine rpm at any given speed after you’ve changed rear-axle ratio, tire diameter, or transmission ratio.

We’ve provided this free episode on YouTube to give you a taste of Roadkill Extra so you can decide if you'd like to subscribe for more episodes.

As you watch, cruise over to, follow us, and watch for future posts asking for your questions to be answered on the Q&A sessions that are posted every Friday on Roadkill Extra Powered by Dodge.

Credits MotorTrend Channel
added on 19 Aug. 2017


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