225/50 R18 - Best tyres 2025 - market overview, tests, reviews

225/50 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 - 50 is height of the tyre, which is calculated as 50% of the tyre width (225mm), which means the sidewall height has 112.5 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 255/55 R18(2317.55 mm), 190/50 R17(1953.44 mm), 255/70 R16(2398.29 mm), 195/55 R16(1950.61 mm), 265/35 R20(2178.69 mm), 195/70 R14(1974.81 mm), 265/45 R20(2345.2 mm).