Goodride SA37 is a summer tyre made in total of 78 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. In
315/40 R21, SA37 usually competes against
Sport SA-37, which is a tyre from
Westlake with a rating of 0%, compared to 0% of the
Goodride in question.
