Michelin Alpin A4 is a winter tyre made in total of 35 sizes, ranging from R14 to R14 - this particular dimension is R15, which means it fits to a 15 inch/381mm diameter wheel. 185/60 R15 is 20mm wider than the narrowest dimension (165) and 40mm narrower than the widest one (225). 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 are 2 possible speed indexes for Michelin Alpin A4 - "T","H", which are good for speeds up to 190, 210 km/h. In 185/60 R15, Alpin A4 usually competes against UltraGrip 9+, which is a tyre from GoodYear with a rating of 86%, compared to 86% of the Michelin in question. Latest test in 185/60 R15 was held by Autobild in 2015, where Alpin A4 received rating "Recommended" and finished on the 5. place. It was tested on a .