I would rethink the R4's if max traction what you need. Im still disappointed with the traction of my R4 but manage with 4wd. I came from a 2wd mf 35 R1 to L5740 R4 4wd. If I was to buy again It would be R1's and stay in 2 wd more frequently Also ask if new old stock units are available. I saved a bundle and itd how I got my L5740 a new 2008 bought in 2011 with .9 hrs on the clock with full warranty and fianicing