I should have measured more carefully. I looked UXV500 up on the website and took a rather casual measure measurement across the front wheels. Than I bought a 5' x 10' steel sided utility trailer with a ramp.
Upon driving my UXV 500 up the ramp I discovered that the rear wheels were too wide. You'll need 62 inches inside width to avoid scuffing the side walls of the rear tires. I had measured the trailer and it came in just over 60 inches but in no way was that enough to drive it on. Had to exchange the trailer for a 6'x 10' model (Diamond C)
hope this helps you out.