Firestone TZ300a is a summer tyre made in total of 13 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 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, TZ300a usually competes against
Ventus Prime3 K125, which is a tyre from
Hankook with a rating of 0%, compared to 0% of the
Firestone in question.
