Goodyear UltraGrip Performance Gen-1 285/40 R20

Goodyear UltraGrip Performance Gen-1 is a winter tyre made in total of 101 sizes, ranging from R15 to R15 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 285/40 R20 is 90mm wider than the narrowest dimension (195) and -10mm narrower than the widest one (275). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (285mm), which results in 114mm sidewall height.