Dunlop SP Winter Response 2 is a winter tyre made in total of 28 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 10mm narrower than the widest one (195). 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, there are 2 possible speed indexes for Dunlop SP Winter Response 2 - "T","H", which are good for speeds up to 190, 210 km/h. In 185/55 R15, SP Winter Response 2 usually competes against WinterContact TS 860, which is a tyre from Continental with a rating of 64%, compared to 60% of the Dunlop in question.
