245/35 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 - 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 mm, which is very similar to 165/60 R14(1739.19 mm), 245/45 R18(2129.06 mm), 170/60 R17(1997.42 mm), 245/65 R17(2357.14 mm), 175/70 R13(1807.04 mm), 255/35 R20(2156.7 mm), 185/55 R14(1756.46 mm). You can find 245/35 R20 on 24 car models - mainly Aston Martin, Ferrari, Maserati, Porsche, BMW.