i bought my car with some M/T sportsman on the back. i believe they are 10" wide. i changed the rims and tires out, but kept the old ones. i recently put the M/T's back on for pavement destuction :-) but when i light em up, they leave no burn marks on the pavement at all. :-( are they just old tires or something???? how am i suppose to endorce muscle cars with no proof of power along my property front???