Dunlop SP Sport 01 is a summer tyre made in total of 64 sizes, ranging from R15 to R15 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 255/45 R18 is 70mm wider than the narrowest dimension (185) and 10mm narrower than the widest one (265). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (255mm), which results in 114.75mm sidewall height. In 255/45 R18, there are 2 possible speed indexes for Dunlop SP Sport 01 - "V","Y", which are good for speeds up to 240, 300 km/h. In 255/45 R18, SP Sport 01 usually competes against EuroALL Season AS210, which is a tyre from Falken with a rating of 61%, compared to 0% of the Dunlop in question.
