I believe the standard width is 6 inches. And yes, the bolt pattern (easily measured to confirm) is 5 on 4.5.
Years ago, RockyMtnRay tried to use 7-inch wheels instead of the stock 6 inch wheels. It didn't work - too wide.
Post #57 here
https://www.trailmanorowners.com/for...kirt#post36327
Bill