Semperit Speed-Grip 5 is a winter tyre made in total of 93 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 60mm wider than the narrowest dimension (165) and 50mm narrower than the widest one (275). 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, Speed-Grip 5 usually competes against
Polaris 6, which is a tyre from
Barum with a rating of 83%, compared to 78% of the
Semperit in question. Latest test in
225/40 R18 was held by Autobild in 2025, where Speed-Grip 5 received rating "Good" and finished on the 11. place. It was tested on a
BMW M135i.
Winter
