Mine came with the r4s also as is typical. I've been running r1s in the winter and they work GREAT. I did not have clearance for chains on my 3015 plus my snow clearing clients wouldn't want chains used on their driveways anyway. I made a set of chains for them but haven't needed them. I had to get all four tires with wheels because of the 4wd. I was able to get them through my nearest dealer in Chico CA. Check with Bills Tractor in Texas if your dealer can't get them. Seems I paid about $1600 for my size. It's been worth it.