245/40 R18 Bridgestone Potenza Race variants
Bridgestone Potenza Race is a summer tyre made in total of 17 sizes, ranging from R17 to R17 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 245/40 R18 is 20mm wider than the narrowest dimension (225) and 60mm narrower than the widest one (305). 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 is only one possible speed index for Bridgestone Potenza Race - "Y", which is good for speeds up to 300 km/h.
Bridgestone Potenza Race is made in 17 sizes, starting from 225/45 R17 up to 305/30 R20.
