Goform GH18 275/45 R18

Goform GH18 is a summer tyre made in total of 9 sizes, ranging from R17 to R17 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 275/45 R18 is 70mm wider than the narrowest dimension (205) and -20mm narrower than the widest one (255). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (275mm), which results in 123.75mm sidewall height.