I have had Nitto's and KDW's on the Z. The KDW's were IMO 100% better than the Nitto's for a year round tire. I am currently running 295/35R18 ZR Ulra Sessanta Vredestein tires. Great tire as well but still think BFG has it down with the KDW's. Sumitomo's suck... I have ran many different tires on the Z.. :p