225/40 R18 - Best tyres 2025 - market overview, tests, reviews
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225/40 R18 doesn't belong to the most popular dimensions for tyres - there are tyre models available, which can be compared to 325/30 R21, 155/60 R15, 155/65 R13. Let's break down the sizing - 40 is height of the tyre, which is calculated as 40% of the tyre width (225mm), which means the sidewall height has 90 mm. The wheel diameter is R18, which means it fits to a 18 inch/457.2mm diameter wheel. The total circumference of the tyre is mm, which is very similar to 235/30 R20(2038.89 mm), 235/45 R19(2180.58 mm), 235/55 R20(2408.03 mm), 235/75 R15(2304.36 mm), 160/60 R14(1720.34 mm), 245/40 R18(2052.09 mm), 165/65 R14(1791.02 mm). You can find 225/40 R18 on 51 car models - mainly Mercedes-Benz, BMW, Opel, Seat, Alfa Romeo.
