I've run full tread depth and shaved RA-1s on my e36m3 race car (sold). Full tread depth are fine, as long as you don't push them very much. I would recommend getting the new ones shaved slightly (2/32nds or so) at a minimum, or do a lot of highway miles with them. I chunked a new RA-1 at Phoenix at PIR. Too much for the right front on the banking. Laguna won't be kind to the right front either...
I agree with Porschefile. My fastest times on RA-1s occurred in the session I corded them.
'11 E90 M3, Mebourne/Black/Fox Red/Black, 6MT, roof, PP2, heated seats, moonroof, split folding rear seats, iPod/USB adapter, Technic harness, JL XD 6/600.
'02 E46M3, Imola/Black, 6MT, CWP, no sunroof, Ohlins, Eibachs, PFC DD rotors, PFC pads! HAT Clarus/Legatia speakers, 2 big amps in the back.
'05 X5 4.4i, Imola/Black, Premium, Cold, HAT Imagine 6.5's, Intravee iPod adapter