Mickeys all the way. I had Nitto 555Rs when they first came out, and they were useless. The M/T radials didn't launch quite as hard as my bias slicks, but the mph was better. Never understood the radial/radial and bias/bias matching thing. I've been running bias slicks with radial fronts for years on the track and street. The rear end will sway a little, but never enough to cause panic.