Nexen N fera Sport is a summer tyre made in total of 94 sizes, ranging from R16 to R16 - this particular dimension is R20, which means it fits to a 20 inch/508mm diameter wheel. 315/35 R20 is 110mm wider than the narrowest dimension (205) and -30mm narrower than the widest one (285). 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. In 315/35 R20, there is only one possible speed index for Nexen N fera Sport - "Y", which is good for speeds up to 300 km/h. In 315/35 R20, N fera Sport usually competes against Quatrac Pro+, which is a tyre from Vredestein with a rating of 58%, compared to 67% of the Nexen in question.