255/45 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 - 45 is height of the tyre, which is calculated as 45% of the tyre width (255mm), which means the sidewall height has 114.75 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 185/55 R16
(1916.06 mm), 255/50 R19
(2317.24 mm), 185/75 R16
(2148.54 mm), 255/65 R17
(2397.98 mm), 195/50 R16
(1889.35 mm), 265/35 R18
(2019.1 mm), 195/65 R15
(1993.34 mm). You can find 255/45 R20 on 9 car models - mainly .
