Apollo Amazer 4G ECO is a summer tyre made in total of 23 sizes, ranging from R13 to R13 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 245/45 R18 is 100mm wider than the narrowest dimension (145) and -50mm narrower than the widest one (195). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (245mm), which results in 110.25mm sidewall height. In 245/45 R18, Amazer 4G ECO usually competes against Snowpower HP, which is a tyre from Tristar with a rating of 0%, compared to 0% of the Apollo in question.