I keep them at 32-34 psi.I just put on Conti Extreme Contact DWS06's in 255/40R19. Max inflation number is 51psi. But the Extreme Contact Sports (275/35R20) that came on my Roush say the same 51 max. But the recommendation on the sticker inside the driver side door says 33 psi which is what I've been running them at. Can you tell me where you are running your DSW's? Many Thanks!