235/45 R18 - Best tyres 2025 - market overview, tests, reviews

235/45 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 - 45 is height of the tyre, which is calculated as 45% of the tyre width (235mm), which means the sidewall height has 105.75 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 205/65 R15(2034.18 mm), 275/40 R19(2207.28 mm), 215/40 R18(1976.69 mm), 275/50 R20(2459.87 mm), 215/55 R18(2179.32 mm), 285/30 R20(2133.14 mm), 215/75 R15(2210.11 mm). You can find 235/45 R18 on 27 car models - mainly Peugeot, Ford, Kia, Lexus, Opel.