Austone SP901 185/55 R15

Austone SP901 is a winter tyre made in total of 78 sizes, ranging from R14 to R14 - this particular dimension is R15, which means it fits to a 15 inch/381mm diameter wheel. 185/55 R15 is 30mm wider than the narrowest dimension (155) and 110mm narrower than the widest one (295). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (185mm), which results in 101.75mm sidewall height. In 185/55 R15, SP901 usually competes against BluEarth winter V905, which is a tyre from Yokohama with a rating of 0%, compared to 15% of the Austone in question.