A commonly available 16" size is 255-50-16 from various tire brands.... BFG G-Force T/As are what I run on for my street/hwy/HSAX/HPDE events... decent performance... but 340 tread wear rating... your mileage may vary.... I have vintage mini-light rims 16x8 ("Performance" brand, from Australia).

For my serious pylon AX or road course HSAX competition events, I've run Hoosier A6 275-45-16 tires (DOT) on my lt-wt Centerline 16x10 rims front/rear... will eventually get a new set A7 or R7. Hoosiers stick like glue... only issue is classifications allowed, as well as limited lifetime wear (roughly 60 minutes, 120-180 minutes at best max time on tracks).

BUT, perhaps somewhere in my future will be set of 18x10-11s to run the popular 200 tread wear rated tires... at least 275- or else go for 315- front and rear (squared).... $$$$ overall!!!

Mopar Mitch "Road racers and autocrossers go in deeper and come out harder!"... and rain never stops us from having fun with our cars... in fact, it makes us better drivers! Check out MOPAR ACTION MAGAZINE, August 2006 issue for feature article and specs on my autocross T/A!