Dunlop Grandtrek AT20 255/70 R16

Dunlop Grandtrek AT20 is a summer tyre made in total of 14 sizes, ranging from R13 to R13 - this particular dimension is R16, which means it fits to a 16 inch/406.4mm diameter wheel. 255/70 R16 is 50mm wider than the narrowest dimension (205) and 10mm narrower than the widest one (265). This tyre profile of 70 means the sidewall height of the tyre is 70% of the tyre width (255mm), which results in 178.5mm sidewall height.