I currently have 305/35/20 Racemasters on a '15 Hellcat [M6], 20x10.5" wheels. They're a little taller and narrower than the typical 305/35. Only one trip to a track, and only two passes, due to several breakdowns and the need to leave for work. Started at 20psi, launch felt about the same as an NT05R. Prefer the M&H over the Nitto's on the street