TriStar Allseason Power 245/50 R18

TriStar Allseason Power is a allround tyre made in total of 135 sizes, ranging from R13 to R13 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 245/50 R18 is 100mm wider than the narrowest dimension (145) and 30mm narrower than the widest one (275). This tyre profile of 50 means the sidewall height of the tyre is 50% of the tyre width (245mm), which results in 122.5mm sidewall height.