Gear Ratio calc help

FirstMach1 · May 23, 2016

Hi all. Just did the ol' spin the tire and watch the drive axle to find out my rear ratio. Never done this before. Easy enough. What has me confused is the result. I got 1.5 to 1. Now I know this can't be correct. I'm assuming it is because only one tire was off the ground....maybe. Really have no idea.

Any thoughts here. Just curious what I'm doing wrong.

Thanks

Eric

FirstMach1 · May 23, 2016

So let me answer my own question for someone else who may get to this point. After a VERY brief internet search I realized with any open rear axle, which I guess I have, I need to rotate the tire twice. Or double my figures to get 3 to 1.

If I'm wrong please advise. Thanks for your patience.

Eric

Jeff73Mach1 · May 23, 2016

You are correct.

rocket366 · May 23, 2016

A 2.75/1 final drive is common.

Paul

Gear Ratio calc help

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