255/55 R20 - Best tyres 2026 - market overview, tests, reviews

255/55 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 - 55 is height of the tyre, which is calculated as 55% of the tyre width (255mm), which means the sidewall height has 140.25 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 195/55 R15(1870.82 mm), 265/35 R19(2098.9 mm), 195/65 R16(2073.14 mm), 265/45 R18(2185.61 mm), 205/40 R17(1871.76 mm), 265/65 R18(2518.61 mm), 205/55 R16(1985.17 mm).