I have r4's on my tractor and farm with it. At first I thought I was making a mistake because of the traction issue and self cleaning. Is your tractor 4-wheel drive? I seem to prefer the R4's now that i've used them. If i need that extra traction I just turn on 4x4 and go on. I think If my tractor was 2-wheel drive i'd go with the R1 ag tires. However, I feel like I get less field compaction with my R4's and loader work seems more stable. I think you could argue for either tire. I've owned both. Some things you have to consider are the lay of the land, type of soil your working and what kinda jobs your doing. My tractor is mostly used for hay and feeding round bales in the winter. On occassion I'll plow or disk, but haven't noticed any major problems with the R4's and when I do get in a muddy spot I use 4-wheel drive. They seem to be easier on my grass. If I were plowing lots I'd go with the R1's. Good Luck