Michelin Racing Size Designation
Road legal sizes
Rolling Circumference
Recommended Rims
16/53-13
175/60R13 72V
1640 mm
5 to 6 inches
20/53-13
225/45R13 77V
1635 mm
7 to 8,5 inches
15/60-15
170/65R15 77V
1847 mm
5 to 6 inches
18/60-15
215/55R15 79V
1885 mm
6 to 7.5 inches
23/62-15
270/45R15 86V
1923 mm
8.5 to 10.5 inches
26/61-15
295/40R15 87V
1891 mm
10 to 11.5 inches
29/61-15
335/35R15 93V
1903 mm
11 to 13 inches

Michelin TB15 sizing..