Vredestein Ultrac+ is a summer tyre made in total of 79 sizes, ranging from R15 to R15 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 255/55 R18 is 80mm wider than the narrowest dimension (175) and -60mm narrower than the widest one (195). This tyre profile of 55 means the sidewall height of the tyre is 55% of the tyre width (255mm), which results in 140.25mm sidewall height. In
255/55 R18, Ultrac+ usually competes against
Protech NewGen, which is a tyre from
Viking with a rating of 32%, compared to 45% of the
Vredestein in question.
Summer
