Really? Our 3.0i Sport with Yoko Geolandar HTS G052 in the stock size of 255/55 doesn't have any oversteer charactersitics. It's not like the back end steps out or anything under hard cornering (even under braking). I guess with a huge rear anti-roll bar the rear might want to swap ends, but I still don't see how a huge rear tire helps in the handling department either.