Barum Bravuris 3 HM is a summer tyre made in total of 77 sizes, ranging from R14 to R14 - this particular dimension is R19, which means it fits to a 19 inch/482.6mm diameter wheel. 275/45 R19 is 90mm wider than the narrowest dimension (185) and -20mm narrower than the widest one (255). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (275mm), which results in 123.75mm sidewall height. In 275/45 R19, there is only one possible speed index for Barum Bravuris 3 HM - "Y", which is good for speeds up to 300 km/h.