Petlas Imperium PT515 is a summer tyre made in total of 11 sizes, ranging from R15 to R15 - this particular dimension is R15, which means it fits to a 15 inch/381mm diameter wheel. This tyre profile of 60 means the sidewall height of the tyre is 60% of the tyre width (185mm), which results in 111mm sidewall height. In 185/60 R15, there is only one possible speed index for Petlas Imperium PT515 - "H", which is good for speeds up to 210 km/h. In 185/60 R15, 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.