Goodride SA37 is a summer tyre made in total of 80 sizes, ranging from R15 to R15 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 315/40 R21 is 130mm wider than the narrowest dimension (185) and -30mm narrower than the widest one (285). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (315mm), which results in 126mm sidewall height.
315/40 R21 Goodride SA37 variants
315/40 R21 111 Y
EAN: 6938112606510
