Toyo Observe Winter Sport 1 is a winter tyre made in total of 10 sizes, ranging from R16 to R16 - this particular dimension is R18, which means it fits to a 18 inch/457.2mm diameter wheel. 245/45 R18 is 40mm wider than the narrowest dimension (205) and 30mm narrower than the widest one (275). This tyre profile of 45 means the sidewall height of the tyre is 45% of the tyre width (245mm), which results in 110.25mm sidewall height. In
245/45 R18, Observe Winter Sport 1 usually competes against
WR Snowproof P, which is a tyre from
Nokian with a rating of 75%, compared to 74% of the
Toyo in question.
Winter
