Vredestein Ultrac Pro is a summer tyre made in total of 87 sizes, ranging from R18 to R18 - this particular dimension is R21, which means it fits to a 21 inch/533.4mm diameter wheel. 275/45 R21 is 70mm wider than the narrowest dimension (205) and 20mm narrower than the widest one (295). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (275mm), which results in 123.75mm sidewall height. In
275/45 R21, Ultrac Pro usually competes against
Proxes Sport 2, which is a tyre from
Toyo with a rating of 64%, compared to 78% of the
Vredestein in question.