GoodYear UltraGrip Performance+ is a winter tyre made in total of 177 sizes, ranging from R15 to R15 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 245/40 R18 is 50mm wider than the narrowest dimension (195) and 30mm narrower than the widest one (275). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (245mm), which results in 98mm sidewall height. In 245/40 R18, there are 2 possible speed indexes for GoodYear UltraGrip Performance+ - "V","W", which are good for speeds up to 240, 270 km/h. In 245/40 R18, UltraGrip Performance+ usually competes against Blizzak LM-005, which is a tyre from Bridgestone with a rating of 88%, compared to 85% of the GoodYear in question.
