33x12.5, on 15x8. Rumoured to be good in the ice and snow, so I thought I'd give 'em a try. For sure an improvement in terms of grip over the old A/Ts that were at <20%. And they are quiet enough on the highway that I can't hear them over the rust hole in my muffler <img src="/forums/images/graemlins/notooth.gif" alt="" />, but thats the only comparison I've got. Oh and the power loss wasn't that noticeable but I think I determined at some point she's got 4.70 gears from the factory.