255/55 R18 - Best tyres 2025 - market overview, tests, reviews

255/55 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 - 55 is height of the tyre, which is calculated as 55% of the tyre width (255mm), which means the sidewall height has 140.25 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 225/55 R19(2293.68 mm), 295/45 R20(2430.02 mm), 225/70 R16(2266.34 mm), 325/30 R21(2288.34 mm), 235/45 R17(2020.99 mm), 235/55 R18(2248.44 mm), 235/65 R18(2396.09 mm). You can find 255/55 R18 on 10 car models - mainly Mercedes-Benz, Land Rover, Audi, BMW, Porsche.