Nexen ROADIAN AT 4x4 285/50 R20

Nexen ROADIAN AT 4x4 is a tyre made in total of 17 sizes, ranging from R14 to R14 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 285/50 R20 is 80mm wider than the narrowest dimension (205) and 0mm narrower than the widest one (285). 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.