Good idea Farmer, but instead I am tapping friends for higher tech... One of the cool things about Artisan's Asylum is that we have a community full of people that are experts on all sorts of things, and that have cool tools in their personal collection as well as what is in our shops...
I put out the word that I needed help last night, and today I'm getting the wheel laser scanned and measured - of course it's a lower tech scanner so its probably only going to be accurate to about 0.1mm or so, but I figure that should do...
I may go back to the cardboard technique as well if I need to verify....
But I am about as certain as I can be until I get the scan results that the bolt circle on the wheels I have is MUCH less than 92mm... I don't like the way I had to make the measurements for accuracy, but I got the same results using two different techniques and tools - between 88 and 90mm...
In the meantime, I just got trained up on our powder coating gear - now waiting for my test parts to cool... (If you think watching paint dry is exciting, you should try watching it melt.....)
ex-Gooserider