Toyo Open Country AT+ 285/50 R20

Toyo Open Country AT+ is a summer tyre made in total of 55 sizes, ranging from R13 to R13 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 285/50 R20 is 90mm wider than the narrowest dimension (195) and 10mm narrower than the widest one (295). This tyre profile of 50 means the sidewall height of the tyre is 50% of the tyre width (285mm), which results in 142.5mm sidewall height.