Nexen N fera Sport is a summer tyre made in total of 96 sizes, ranging from R16 to R16 - this particular dimension is R19, which means it fits to a 19 inch/482.6mm diameter wheel. 235/55 R19 is 30mm wider than the narrowest dimension (205) and 50mm narrower than the widest one (285). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (235mm), which results in 129.25mm sidewall height. In 235/55 R19, there is only one possible speed index for Nexen N fera Sport - "V", which is good for speeds up to 240 km/h. In 235/55 R19, N fera Sport usually competes against Quatrac Pro+, which is a tyre from Vredestein with a rating of 60%, compared to 66% of the Nexen in question.