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 205/50 R17(2000.57 mm), 275/30 R20(2114.29 mm), 205/65 R16(2113.98 mm), 275/40 R20(2287.08 mm), 215/45 R16(1884.64 mm), 275/55 R17(2306.87 mm), 215/60 R16(2087.27 mm). You can find 235/45 R18 on 27 car models - mainly Peugeot, Ford, Kia, Lexus, Opel.