Nexen N blue HD Plus is a summer tyre made in total of 430 sizes, ranging from R13 to R13 - this particular dimension is R19, which means it fits to a 19 inch/482.6mm diameter wheel. 255/50 R19 is 110mm wider than the narrowest dimension (145) and 30mm narrower than the widest one (285). This tyre profile of 50 means the sidewall height of the tyre is 50% of the tyre width (255mm), which results in 127.5mm sidewall height. In 255/50 R19, there are 2 possible speed indexes for Nexen N blue HD Plus - "Y","T", which are good for speeds up to 300, 190 km/h.
