I run them on my radial/ outlaw 275 car. Been 1.12 60' and lots of 1.13- 1.15. Some guys have been alot faster than that on them. They are easier to make work than a real drag radial but are by no means a slick. Still got to have a good shock and car set up. Have about 50 passes on them in the 4 sec zone still working great so imagine they would be long lasting on a bracket car.