Continental UltraContact NXT is a summer tyre made in total of 22 sizes, ranging from R16 to R16 - this particular dimension is R19, which means it fits to a 19 inch/482.6mm diameter wheel. 235/55 R19 is 30mm wider than the narrowest dimension (205) and 20mm narrower than the widest one (255). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (235mm), which results in 129.25mm sidewall height. In 235/55 R19, there is only one possible speed index for Continental UltraContact NXT - "T", which is good for speeds up to 190 km/h. In 235/55 R19, UltraContact NXT usually competes against Eagle F1 Asymmetric 6, which is a tyre from Goodyear with a rating of 93%, compared to 95% of the Continental in question.