OK, reviving the old thread...
So I picked up the Rota Slipstream in 15x7.5 and running Hankook Ventus in a 225 50 15. I autocrossed them at yesterdays CCR SCCA event. Once the mold release was scrubbed off, they definitely had a lot of grip. Night and day compared to my old tires and wheels. I am rubbing the front struts a bit. I think some spacers might by in my future for the front wheels.
Other than that, its time to get a real pressure gage and start dialing these tires in. I may actually be more competitive in STS now.
Parking Lot Hero
2008 WRX daily driver
2003 ZX3 23D Autox Car 42 FSP
"Hella Functional - Raced, Not Hard Parked"