My Y has performance package with 21 Uberturbines. The ride was so harsh that 3 months ago I lowered TP to 38 psi. Very noticable change! Not near as harsh of a ride as when they were at 42psi. I cannot comment on additional wear nor do I care. I did seem to lose some rage. Looks like about 3% which I can live with since I only drive about 35 miles a day.