ran the 512s on my RS rally car for several tarmac events. they were great in the wet, grip was fine, what I really liked about em was that they gave you good warning before all the grip went awaaaaay, bye bye! the 205/50-15 tires were mildly undersize for the RS, they drifted on pavement reall predictably. the smaller diameter effectively lowered the gearing which cost some hi end speed but made the car dig out of slow sections real nice.
thse falkens are aimed at the oem replacement market, treadwear is like 440 so you start with LOTS of rubber. somehow I get the impression that excess rubber may not stay on there for long?