Kleber Dynaxer UHP is a summer tyre made in total of 44 sizes, ranging from R17 to R17 - this particular dimension is R19, which means it fits to a 19 inch/482.6mm diameter wheel. 245/40 R19 is 50mm wider than the narrowest dimension (195) and 10mm narrower than the widest one (255). 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 R19, there is only one possible speed index for Kleber Dynaxer UHP - "Y", which is good for speeds up to 300 km/h. In 245/40 R19, Dynaxer UHP usually competes against Advantage, which is a tyre from BFGoodrich with a rating of %, compared to 43% of the Kleber in question.