Yes you can. Currently I am running Nitto RII Extremes (no longer available, but I just bought the pair last year) in sizes 305/35/18 and 275/40/17 on stock C5 Z06 sized rims with no problems. Will probably go to the NT01 when these are done.100% agree, the vette is still on original tires. Can I go wider tires in the front with stock rims?
I use these tires on the street because its nice and warm here in Arizona and they do stick in the heat.
Go to this thread and go to rocketsled's post (#3). Go down to the bottom of his post where his signature is and click on his signature on the Rocketsled/02Quicksilver portion. That should take you to his homepage where, if you scroll down to the bottom you will see a link for a tire computation spreadsheet.