Toyo Observe Winter Sport 1 is a winter tyre made in total of 9 sizes, ranging from R16 to R16 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 225/40 R18 is 20mm wider than the narrowest dimension (205) and 20mm narrower than the widest one (245). 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, Observe Winter Sport 1 usually competes against
WR Snowproof P, which is a tyre from
Nokian with a rating of 67%, compared to 65% of the
Toyo in question. Latest test in
225/40 R18 was held by Autobild in 2025, where Observe Winter Sport 1 received rating "Satisfactory" and finished on the 17. place. It was tested on a
BMW M135i.
Winter
