Firestone Destination Winter 235/50 R18

Firestone Destination Winter is a winter tyre made in total of 18 sizes, ranging from R15 to R15 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 235/50 R18 is 30mm wider than the narrowest dimension (205) and 0mm narrower than the widest one (235). This tyre profile of 50 means the sidewall height of the tyre is 50% of the tyre width (235mm), which results in 117.5mm sidewall height.