Thanks Chiel!
I found a "new" tire brand on the net, Vitour Galaxy R1 G/T, offering 15" wheels with V-speed rating for a very nice price. I've googled it and got some interesting hits in a german corvette-forum:
http://www.corvetteforum.de/showthread.php?tid=92992
http://www.corvetteforum.de/sh...d=1657604#pid1657604
May be the right brand for the daily drive.
Regards,
Robert