There are many factory siped tires as well. Both my Dunlop SP Sport 5000s and my Firestone Firehawk SZ50EP's are siped.
Heck, even the 14" Michelins currently on the Buick have "sipe like" cuts on the tread blocks to improve wet and ice traction.
So there are factory sipes as well. That option will not void your warranty, but is probably still subject to chunking.
TB
Tony Boner
Personal: 98cdw27@charter.net Work: tony.boner@sun.com
Saving the computer world from WinBloze as Unix/Solaris/Java Guru
http://www.sun.com 1998 Contour SVT Pre-E1 618/6535 Born On Date: 4/30/1997
Now with Aussie Bar induced mild oversteer.
