I've linked another article below that also helps with determining your bolt pattern.

Measure trailer wheel bolt pattern. Match your trailer wheel to the hub by number of bolts and bolt circle. Often time, we get trailers, or need to sell a wheel, and cant figure out what size the bolt pattern is on a 5 lug wheel. You can also determine your 5 bolt pattern by measuring the distance between the center of one bolt hole, to the center of the bolt hole next to it.

Extend the ruler directly across the center of the wheel to the adjacent. It can appear in either inches or millimeters, so be sure you know which one you’re looking at. Option 1 is usually easier to do while the wheel is still mounted on the.

If your trailer wheel hubs have 5 lug bolts, measuring is slightly different. How to measure 5 bolt pattern trailer wheel/hubs. Determining the bolt pattern on you trailer:

Count the number of lugs one trailer wheel. Whether you’re fabbing up a spare tire rack, figuring out what bolt pattern your wheel or. To measure 6 lug pattern wheels, place the end of a ruler or tape measure in the center of one lug or bolt.

Most trailer wheels have 4 or 5 lugs per wheel. This wheel bolt pattern guide tool is helpful when getting a measurement from a trailer wheel or hub. Below we illustrate how to measure your wheels bolt pattern.

The bolt pattern consists of two numbers. The industry standard bolt pattern is 5 lug on 4.5″ (545) with 5 lug on 5″ (550) following in second. If the trailer wheel has an even.