Vredestein Ultrac Pro 255/35 R21

Vredestein Ultrac Pro is a summer tyre made in total of 91 sizes, ranging from R18 to R18 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 255/35 R21 is 50mm wider than the narrowest dimension (205) and 100mm narrower than the widest one (355). This tyre profile of 35 means the sidewall height of the tyre is 35% of the tyre width (255mm), which results in 89.25mm sidewall height.