Goodyear UltraGrip Performance Gen-1 is a winter tyre made in total of 100 sizes, ranging from R15 to R15 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 245/45 R18 is 50mm wider than the narrowest dimension (195) and 30mm narrower than the widest one (275). 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, there is only one possible speed index for Goodyear UltraGrip Performance Gen-1 - "V", which is good for speeds up to 240 km/h. In 245/45 R18, UltraGrip Performance Gen-1 usually competes against Winter i*cept evo2 W320, which is a tyre from Hankook with a rating of 0%, compared to 0% of the Goodyear in question. Latest test in 245/45 R18 was held by Sportscars in 2018, where UltraGrip Performance Gen-1 received rating "Good" and finished on the 5. place. It was tested on a .
