The R4 is the most popular tire for CUT's because most of the users have not the money or space for multiple tractors. If they did, they would almost always be better off with seperate tractors for the lawn with turfs and for off the lawn, with R1's. I can think of about zero cases where an R4 tire is better than an R1 off the lawn. the same thing is true on the lawn where I cant think of any case where an R4 would be better than turfs. An R4 is an industrial tire made for construction sites and operating on fairly hard surfaces. Thier use on CUT's is just a coincedence driven by financial and/or space limitations. For 90% of CUT users, especially those with one tractor, the R4 tire makes the most sence, which is why 90% of them are so-equipped. When a user gets too far off the lawn, he is destined for trouble like that poor fellow with the bush-hog in the picture. No matter what your tire, you got to know your limitations. When it comes to mud or snow, the bar is much lower for the R4 than the R1, in more ways than one. Pictures are worth more than words on sites like this and I guarantee we will not see a picture posted of a 4wd tractor with R1's stuck in mud that is not even up to the rim in depth.
