BFGoodrich G-Grip SUV is a summer tyre made in total of 6 sizes, ranging from R16 to R16 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 215/55 R18 is 10mm wider than the narrowest dimension (205) and 0mm narrower than the widest one (215). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (215mm), which results in 118.25mm sidewall height. In 215/55 R18, there is only one possible speed index for BFGoodrich G-Grip SUV - "V", which is good for speeds up to 240 km/h. In 215/55 R18, G-Grip SUV usually competes against ZIEX ZE310 ECORUN, which is a tyre from Falken with a rating of 75%, compared to 0% of the BFGoodrich in question.