Royal Black Royal Winter 315/35 R20

Royal Black Royal Winter is a tyre made in total of 43 sizes, ranging from R13 to R13 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 315/35 R20 is 150mm wider than the narrowest dimension (165) and -50mm narrower than the widest one (265). This tyre profile of 35 means the sidewall height of the tyre is 35% of the tyre width (315mm), which results in 110.25mm sidewall height.