Fulda SportControl is a summer tyre made in total of 40 sizes, ranging from R16 to R16 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 235/40 R18 is 30mm wider than the narrowest dimension (205) and 30mm narrower than the widest one (265). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (235mm), which results in 94mm sidewall height. In 235/40 R18, there is only one possible speed index for Fulda SportControl - "Y", which is good for speeds up to 300 km/h. In 235/40 R18, SportControl usually competes against P ZERO, which is a tyre from Pirelli with a rating of 0%, compared to 0% of the Fulda in question.