Bridgestone Potenza RE050 is a summer tyre made in total of 11 sizes, ranging from R17 to R17 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 245/45 R18 is 30mm wider than the narrowest dimension (215) and 10mm narrower than the widest one (255). 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 are 2 possible speed indexes for Bridgestone Potenza RE050 - "Y","H", which are good for speeds up to 300, 210 km/h. In 245/45 R18, Potenza RE050 usually competes against UltraGrip Performance Gen-1, which is a tyre from Goodyear with a rating of 0%, compared to 0% of the Bridgestone in question.
