Goodride SA37 225/30 R20

Goodride SA37 is a summer tyre made in total of 78 sizes, ranging from R15 to R15 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 225/30 R20 is 40mm wider than the narrowest dimension (185) and 60mm narrower than the widest one (285). This tyre profile of 30 means the sidewall height of the tyre is 30% of the tyre width (225mm), which results in 67.5mm sidewall height.