The second set of numbers after the slash, which is 50 in this case, is actually a percentage, so it's 50%. It refers to the height of the tire (from the wheel to the tread) compared with the tire ...

When engaged, the gear ratio between the engine and the wheels is altered, providing greater torque multiplication. Low range isn’t exclusive to 4x4s, but it is perhaps more valuable in this ...

Then multiply both of these individual products together, and divide by the overall gear ratio times the number of inches in a mile (63,360). "336" is simply the reduced, rounded-off whole-number ...

Using a P215/65R15-size tire as an example, we can tell that the tire is for a passenger vehicle and has a 215-millimeter width. On the right side of the slash symbol, you'll find two numbers, a ...

To utilize the chart, first find out your vehicle's original factory gear ratio and current tire size. Then follow both gear ratio and tire sizes until they intersect. This intersection would be ...

By comparison, the new Wrangler Rubicon with a manual transmission has a first gear ratio of 4.46, a 4-to-1 transfer case, and 4.10 axle ratios. This equates to an enormous crawl ratio of 73!

And the 15 is the size of the wheel it's designed for. So, in this case you've got a 31-inch tall tire for a 15-inch wheel. You know the wheel radius is 7.5-inches, and the tire radius is 15.5 inches.

We simulated that tire-change situation of a 26-inch versus a 28-inch tall tire using a taller 3.55:1 (versus a 4.10:1 gear) ratio, and the car lost barely 0.07-second running 10.30s at 130 mph ...