255/30 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 - 30 is height of the tyre, which is calculated as 30% of the tyre width (255mm), which means the sidewall height has 76.5 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 275/45 R18
(2213.88 mm), 215/50 R17
(2031.98 mm), 275/65 R18
(2559.46 mm), 215/65 R16
(2154.82 mm), 285/35 R20
(2222.68 mm), 225/35 R18
(1931.14 mm), 285/45 R21
(2481.54 mm). You can find 255/30 R20 on 1 car models - mainly .
