I have a set of 315/30/18's on a 6 spd, 800hp, turbo car. The are pretty decent all around at about 18psi. To get traction in the lower 3 gears you need to run in the 12 - 14psi range. They wear pretty decent with a good straight line alignment. These are not a good choice for taking corners or aligned for taking corners it chews up the insides really quick.
Oh and don't even think about driving in wet conditions, rain you just might as well stop and wait.
