Are they ET Streets ? or ET Street Radials? There is a difference. The ET Streets are basically a bias ply slick with a couple of tread cuts in them. If you run radials on the car now, I'd go to the ET Street radial. I ran a set of ET Drag slicks (bias ply) on my car with radial front tires, and the car felt like it was all over the place through the middle of the run. Got my attention, if not downright scary. ET Radials give a much more confident feel when mixed with radial front tires.