I switched to the Hoosier radial 30 x 9 slick from a bias tire and I love the radial. My car always hooks good on them and the car goes nice and straight as no walking on the top end like it did a little with the bias. I did not really notice the car going any faster but I love how they work and handle. And since my car is a street car I run a radial tire up front and the car handles way better on radials on all 4 corners. Its just a high 10 car with 10.70's best and all I use is SS springs with the longer stock type shock. Ron