Kumho WinterCraft WP71 is a winter tyre made in total of 54 sizes, ranging from R16 to R16 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 235/45 R18 is 30mm wider than the narrowest dimension (205) and 40mm narrower than the widest one (275). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (235mm), which results in 105.75mm sidewall height. In 235/45 R18, there is only one possible speed index for Kumho WinterCraft WP71 - "V", which is good for speeds up to 240 km/h. In 235/45 R18, WinterCraft WP71 usually competes against Snowprox S954, which is a tyre from Toyo with a rating of 43%, compared to 0% of the Kumho in question.