Saloon car – radial
| Size | Pattern | Permitted
Rim Width | Optimum
Rim Width | Diameter | Overall Width | Tread Width | Revs Per Mile |
| | inch | inch | mm | inch | mm | inch | mm | inch | @100 mph |
| 185/580R15 | slick/wet | 6.5-7.5 | 7 | 583 | 23 | 205 | 8.1 | 185 | 7.3 | 878 |
| 200/580R15 | slick/wet | 6.5-8.5 | 7.5 | 583 | 23 | 216 | 8.5 | 195 | 7.7 | 878 |
| 205/620 R17 | slick/wet | 7.0 - 9.0 | 7.5 | 616 | 24.3 | 215 | 8.5 | 203 | 8 | 822 |
| 215/45R17 CPD A | slick | 7.0 - 9.0 | 8 | 624 | 24.6 | 218 | 8.6 | 212 | 8.3 | |
| 235/610R17 | slick/wet | 8.5-9.5 | 9 | 608 | 23.9 | 245 | 9.7 | 226 | 8.9 | 855 |
| 235/620R17 | slick/wet | 8.5-9.5 | 9 | 620 | 24.4 | 248 | 9.8 | 235 | 9.3 | 826 |
| 245/650R18 | slick/wet | 8.5-9.5 | 9 | 648 | 25.5 | 268 | 10.5 | 246 | 9.6 | 790 |
Other GT (not category specific) – special orders only
| Size | Construction | Pattern | Permitted Rim Width | Optimum Rim Width | Diameter | | Overall Width | | Tread Width | | Revs Per Mile |
| | | inch | inch | mm | inch | mm | inch | mm | inch | @100 mph |
| 235/620R17 | Â C98D/B92W | slick/wet | 8.5-9.5 | 9 | 620 | 24.4 | 248 | 9.8 | 235 | 9.3 | 826 |
| 290/645R17 | Â G76D/B92W | slick/wet | 12.0-13.0 | 12 | 642 | 25.3 | 328 | 12.9 | 286 | 11.3 | 794 |
| 235/645R19 | Â H02DX/H02W | slick/wet | Â 8.0-9.5 | 8 | 648 | 25.5 | 231 | 9.1 | 216 | 8.5 | 791 |
| 285/680R19 | Â J72DX/J72W | slick/wet | Â 10.5-11 | 10.5 | 680 | 26.8 | 293 | 11.5 | 270 | 10.6 | 674 |
Touring car
| 235/610R17 | G84D/G84W | slick/wet | 8.5-9.5 | 9 | 608 | 23.9 | 245 | 9.7 | 226 | 8.9 | 855 |
| Â 245/650R18 | Â D78D/B92W | Â slick/wet | Â 8.5 - 9.5 | Â 9 | 648 | 25.5Â | 268Â | 10.5Â | 246Â | 9.6Â | 790Â |
