I'm presuming you have the stock Bridgestones on.
Go for Metzlers. I went from the Bridgestones to Metzelers on the 03 and felt I could stick to the ceiling with them.
That, and they are what they have as stock on th eSM's and on the 07 range....
Gina
03 America - Pretty stock - except the TBS wheel...
06 America - missing, presumed in bits. With it's TBS wheel...
09 America - It's very blue....
