Goodyear UltraGrip 8 Performance 255/60 R18

Goodyear UltraGrip 8 Performance is a winter tyre made in total of 42 sizes, ranging from R16 to R16 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 255/60 R18 is 60mm wider than the narrowest dimension (195) and 30mm narrower than the widest one (285). This tyre profile of 60 means the sidewall height of the tyre is 60% of the tyre width (255mm), which results in 153mm sidewall height.