Apollo Alnac 4G is a summer tyre made in total of 32 sizes, ranging from R14 to R14 - this particular dimension is R16, which means it fits to a 16 inch/406.4mm diameter wheel. 195/55 R16 is 10mm wider than the narrowest dimension (185) and 10mm narrower than the widest one (205). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (195mm), which results in 107.25mm sidewall height. In 195/55 R16, there is only one possible speed index for Apollo Alnac 4G - "V", which is good for speeds up to 240 km/h. In 195/55 R16, Alnac 4G usually competes against Road Performance, which is a tyre from Riken with a rating of 0%, compared to 0% of the Apollo in question.