Originally Posted by wmtire
I know it's hard to use a tape measure to measure bolt circle diameters, when the wheel is still mounted on the trailer, because of the hub sticking out.We use a hard plastic wheel bolt circle template, that actually will slide over the hub to show you all the four main measurements I talked about in the previous post. I have actually seen some of these plastic ones at Harbor Freight before.
I looked online and saw one you can print out, if you want to go to the trouble of cutting it out and such. You can then just slide it over your hub and see what bolt pattern lines up, so you will know for sure what you need.
On even number of studs, instead of measuring center to center, measure from inside one stud to outside of the opposite stud. Much easier and more accurate.