SRC’s run beautifully on my typhon with 20mm wheel extenders. Dial in some Expo on the ST and it feels locked in on rails. That being said, I refer GRP S7’s cuz they allow me do hella highspeed street bashing. They take everything I can dish out without breaking a sweat. Love them both, but if I could only have one, i’d Have to reach for the GRP’s. Obviously just one man’s opinion; there’s only one way to find out for yourself.