Gripmax SureGrip Pro Sport 215/50 R18

Gripmax SureGrip Pro Sport is a summer tyre made in total of 120 sizes, ranging from R18 to R18 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 215/50 R18 is 10mm wider than the narrowest dimension (205) and 140mm narrower than the widest one (355). This tyre profile of 50 means the sidewall height of the tyre is 50% of the tyre width (215mm), which results in 107.5mm sidewall height.