Uniroyal WinterExpert is a winter tyre made in total of 91 sizes, ranging from R13 to R13 - this particular dimension is R19, which means it fits to a 19 inch/482.6mm diameter wheel. 255/45 R19 is 90mm wider than the narrowest dimension (165) and 20mm narrower than the widest one (275). 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 R19, WinterExpert usually competes against EuroWinter HS01, which is a tyre from Falken with a rating of 61%, compared to 64% of the Uniroyal in question.
255/45 R19 is found on 5 vehicles: