GoodYear UltraGrip Performance 3 305/40 R20

GoodYear UltraGrip Performance 3 is a winter tyre made in total of 302 sizes, ranging from R14 to R14 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 305/40 R20 is 130mm wider than the narrowest dimension (175) and 20mm narrower than the widest one (325). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (305mm), which results in 122mm sidewall height.