Viking ProTech HP is a summer tyre made in total of 30 sizes, ranging from R14 to R14 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 225/40 R18 is 40mm wider than the narrowest dimension (185) and 30mm narrower than the widest one (255). This tyre profile of 40 means the sidewall height of the tyre is 40% of the tyre width (225mm), which results in 90mm sidewall height. In
225/40 R18, ProTech HP usually competes against
Pilot Sport 4, which is a tyre from
Michelin with a rating of 0%, compared to 0% of the
Viking in question.
