Diametro (mm) USA&Canada Europe UK&AU
15.7 5 50 J
16.5 6 52 L
17.3 7 55 N
18.1 8 57 P
18.9 9 60 R
19.8 10 62 T
20.6 11 64 V
21.5 12 67 X
22.3 13 69 Z