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

285/40 R20 doesn't belong to the most popular dimensions for allround tyres - there are 1 tyre models available, which can be compared to 155/60 R15, 170/60 R17, 160/60 R14. 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 2312.21 mm, which is very similar to 295/30 R22(2311.58 mm), 235/70 R16(2310.33 mm), 235/65 R17(2316.3 mm), 255/40 R21(2316.61 mm), 255/45 R20(2316.92 mm), 205/80 R16(2307.19 mm), 255/50 R19(2317.24 mm). There are multiple speed indexes available for allround tyres in 285/40 R20: V(240km/h), Y(300km/h). The same goes for weight indexes: 108.