Re: buying new L4610 vs L4310
I don't think I have, though some of the industrial tires, like OTR's, have what they call a rim guard built in. Basically, it's a raised edge on the sidewall that keeps stumps or anything you might roll past from being able to get under the edge of the rim and bend it. Is what you're talking about anything like that?
Let me know what you find out about the Michelins. BTW, the rear tires will fit on the stock R4 wheels, but the fronts require custom wheels.
Mark