Gislaved Ultra Speed 2 185/55 R15

Gislaved Ultra Speed 2 is a summer tyre made in total of 88 sizes, ranging from R15 to R15 - this particular dimension is R15, which means it fits to a 15 inch/381mm diameter wheel. 185/55 R15 is 10mm wider than the narrowest dimension (175) 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.