I ran both the Pro Bracket Radials 29x 10.5 -15 and the Pro Et Street radials 315x55-15. I switch to the Pro ET Street radial to enter events where Dot tires are required, My car weighs around 3500 pounds with driver and has run 9.8s ..1.42 60 ft times. We dialed it back to 10.1.We have Caltracs with Viking Rear shocks set a C 14 R 8. I have some traction problems with the Single adjustable shocks, but after switching to the dual adjustable no more problems. On my car I saw no difference between the Pro Bracket Radial and the Pro Et Street radials faster cars might, but I didn’t. Love them just bought a new set, it’s a Street/ Strip car with a 512, foot braking. It’s a 69 Dart.