There are many different important parameters when it comes to car wheels, one of those being the bolt pattern. It's actually pretty straightforward to measure.

"Wheel bolt pattern" refers the number of lugs and bolt circle for a given wheel. This is determined by the distance of a circle drawn through the center of your lug nuts.

Wheel bolt-circle diameter is the diameter of a circle drawn through the centers of the wheel's mounting-bolt holes. Whether shopping for new wheels or scrounging wrecking yards for good used ones ...

Bolt Pattern Pro, a simple set of plastic gauges designed to make measuring wheel bolt patterns easier and faster, was judged one of the best new products at the recent 2010 Specialty Equipment Market ...

That Bolt Pattern, Tho The number of lugs and the pattern they form are the first things to think about when wondering whether or not a wheel might work.

LAS VEGAS (Nov. 2, 2010) – The Bolt Pattern Pro, a simple set of plastic gauges designed to make measuring wheel bolt patterns easier and faster, was judged one of the best new products at the 2010 ...

However, the old-body-style Ram 1500 Classic has wheels with five holes, on a 5.5-inch diameter bolt pattern, that look similar to those on the Jeep Wrangler.