255/40 R20 - Best tyres 2025 - market overview, tests, reviews

255/40 R20 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 - 40 is height of the tyre, which is calculated as 40% of the tyre width (255mm), which means the sidewall height has 102 mm. The wheel diameter is R20, which means it fits to a 20 inch/508mm diameter wheel. The total circumference of the tyre is mm, which is very similar to 285/30 R20(2133.14 mm), 215/75 R15(2210.11 mm), 285/40 R20(2312.21 mm), 225/40 R19(2081.62 mm), 295/25 R20(2059.31 mm), 225/55 R17(2134.08 mm), 295/40 R20(2337.34 mm). You can find 255/40 R20 on 12 car models - mainly Audi, ALPINA, Aston Martin, Mercedes-Benz, Nissan.