Heh,when I first saw the title of this thread I pictured a `69 Camaro with 18s up front and the rear rotors shooting rooster tails of sparks down the drag strip!
Seriously another vote for drag radials here. Dependign on what you`re running for rear brakes you may not be able to run 15s anyway. The big speed rated radials (315s,335s,345s) aren`t designed for straight line acceleration and don`t really work that well at the drags. We`ve had customer cars that hooked much better on 255-60-15s than 315-35-17s. Mark SC&C