285/40 R20 - Best tyres 2025 - market overview, tests, reviews

285/40 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 (285mm), which means the sidewall height has 114 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 255/55 R19(2397.35 mm), 195/40 R17(1846.63 mm), 255/70 R18(2557.88 mm), 195/60 R14(1852.28 mm), 265/35 R21(2258.49 mm), 195/70 R16(2134.4 mm), 265/45 R21(2425 mm).