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 265/45 R20
(2345.2 mm), 205/40 R18
(1951.56 mm), 265/70 R15
(2362.48 mm), 205/55 R17
(2064.97 mm), 275/35 R19
(2120.89 mm), 205/80 R16
(2307.19 mm), 275/45 R18
(2213.88 mm). You can find 255/30 R20 on 1 car models - mainly .
