I'm right in the middle of waiting for a replacement set of rubber tires from Bobby at WTW. For my Rockwell 28-3XO, the thickness of the tire is important: a thinner tire (like your typicall urethane) causes interference prolems with the blade within the back vertical blade shield. I may have...
Or Utahr to the natives.
Or Utard to those who don't like folks from around here (or one of our own being a bit self-deprecating).
I've gained quite a lot of good info just lurking, and thought I'd give some info back (when I had something worthwhile to share).
Just started at 24' x 24'...