Nokian WR A4 is a winter tyre made in total of 59 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, there is only one possible speed index for Nokian WR A4 - "V", which is good for speeds up to 240 km/h. In 225/40 R18, WR A4 usually competes against ContiWinterContact TS 850P, which is a tyre from Continental with a rating of 83%, compared to 47% of the Nokian in question. Latest test in 225/40 R18 was held by Sportscars in 2017, where WR A4 received rating "Satisfactory" and finished on the 9. place. It was tested on a .
Relevant tyre tests in same or similiar dimension (225/40 R18)
Name | Wet | Dry | Snow | ||||
---|---|---|---|---|---|---|---|
Best values in test | 1- | 2+ | 2+ | ||||
Nokian WR A4 | 3+ | 2 | 2- | ||||
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Name | Wet | Dry | Snow | Enviromental impact | |||
---|---|---|---|---|---|---|---|
Best values in test | 9,6 | 9,2 | 9,9 | 10 | |||
Nokian WR A4 | 6,3 | 9,2 | 7,1 | 10 | |||
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225/40 R18 is found on 51 vehicles: