245/35 R20 doesn't belong to the most popular dimensions for allround tyres - there are 0 tyre models available, which can be compared to 155/60 R15, 170/60 R17, 160/60 R14. Let's break down the sizing - 35 is height of the tyre, which is calculated as 35% of the tyre width (245mm), which means the sidewall height has 85.75 mm. The wheel diameter is R20, which means it fits to a 20 inch/508mm diameter wheel. The total circumference of the tyre is 2134.71 mm, which is very similar to 195/70 R16(2134.4 mm), 225/55 R17(2134.08 mm), 285/30 R20(2133.14 mm), 245/40 R19(2131.88 mm), 245/45 R18(2129.06 mm), 275/40 R18(2127.49 mm), 215/70 R15(2142.57 mm). There are multiple speed indexes available for allround tyres in 245/35 R20: W(270km/h), Y(300km/h). The same goes for weight indexes: 95. You can find 245/35 R20 on 24 car models - mainly Aston Martin, Ferrari, Maserati, Porsche, BMW.