Saloon car – radial

SizePattern
Permitted
Rim Width
Optimum
Rim Width
Diameter
Overall Width
Tread Width
Revs Per Mile
inch
inch
mminchmminchmminch@100 mph
185/580R15slick/wet
6.5-7.5
7
583232058.11857.3878
200/580R15slick/wet
6.5-8.5
7.5
583232168.51957.7878
205/620 R17slick/wet
7.0 - 9.0
7.5
61624.32158.52038822
215/45R17 CPD Aslick
7.0 - 9.0
8
62424.62188.62128.3
235/610R17slick/wet
8.5-9.5
9
60823.92459.72268.9855
235/620R17slick/wet
8.5-9.5
9
62024.42489.82359.3826
245/650R18slick/wet
8.5-9.5
9
64825.526810.52469.6790

Other GT (not category specific) – special orders only

SizeConstructionPatternPermitted Rim WidthOptimum Rim WidthDiameter Overall Width Tread Width Revs Per Mile
inchinchmminchmminchmminch@100 mph
235/620R17 C98D/B92Wslick/wet8.5-9.5962024.42489.82359.3826
290/645R17 G76D/B92Wslick/wet12.0-13.01264225.332812.928611.3794
235/645R19 H02DX/H02Wslick/wet 8.0-9.5864825.52319.12168.5791
285/680R19 J72DX/J72Wslick/wet 10.5-1110.568026.829311.527010.6674

Touring car

235/610R17 G84D/G84Wslick/wet8.5-9.5960823.92459.72268.9855
 245/650R18 D78D/B92W slick/wet 8.5 - 9.5 964825.5 268 10.5 246 9.6 790