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 235/60 R18(2322.27 mm), 155/65 R13(1670.38 mm), 245/35 R18(1975.12 mm), 160/60 R18(2039.52 mm), 245/40 R21(2291.48 mm), 165/70 R14(1842.86 mm), 245/55 R17(2203.2 mm). You can find 235/45 R18 on 27 car models - mainly Peugeot, Ford, Kia, Lexus, Opel.