Petlas Imperium PT515 is a summer tyre made in total of 11 sizes, ranging from R15 to R15 - 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 20mm narrower than the widest one (215). 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 Petlas Imperium PT515 - "V", which is good for speeds up to 240 km/h. In 195/55 R16, Imperium PT515 usually competes against MP47 Hectorra 3, which is a tyre from Matador with a rating of 44%, compared to 48% of the Petlas in question.