The digital garage of my 1998 Jeep Wrangler.

Jeep Math 101

Jeep and Off Road Equations and Calculations

Speedometer Re-Calculator For Larger Tires
When I first upgraded to larger tires, I did not swap speedomter gears to adjust. I knew I would go bigger, eventually, and regear. This calculator shows how fast you am really driving with any size tires.
Crawl Ratio Calculator
When wheeling in the rock gardens, slower is better. A higher Crawl Ratio equates to a slower minimum speed. This calculator allows selection for any gearing at any speed!
Tire / Gearing Chart
This chart shows engine RPMs at 65MPH with various gears and tire sizes, making it easier to select the right gearing for your rig.
Tire / Gearing Chart Math
How the Tire / Gearing Chart works
Home | Privacy Notice | Warning Notice | About | Contact