I have seen a lot of discussion on the attributes of both Ag (R1's ?) & R4's on this board. I have only had Ag's on my 2 tractors. 1st tractor was a 1900 Ford 4wd, 32 HP, no loader. Had it for 15 years and it did a good job for me. Now have a
M5700 Kubota 4wd, w/FEL, AG tires, with only 18 hours. I have not mowed with the Kubota yet. I kept about 4 acres of lawn cut with a Woods rear mount finish mower. The Ag tires on the Ford did little or no damage to my lawn, only on very wet ground and sharp tuns would it mark the ground a little. No 4wd in use on mowing as lawn is relatively flat.
My Kubota weighs about twice what the Ford did, but it also has tires about twice as large therfore the PSI for contact surface probably more or less equal. Now to the heart of my opinion.
Several months back I needed to move some dirt (about 24 cubic yards) and borrowed by neighbors
L4610 GST w/R4 tires. It did an admirable job but seemed like too much wheel spin. Just this week I had occasion to use my
M5700 and FEL to move/push a lot of dirt. The ground was quite wet and I did do some damage to turf. The AG tires for my money give more traction in most situations. You need to accept that they do a little more damage than R4's though.
Couple all of this with my inexperience with the borrowed
L4610, and same for new
M5700, and never having a lot of loader time. I should have you absolutely confused now!! R1 AG TIRES for my money.