155/90 R18 - Best tyres 2025 - market overview, tests, reviews

155/90 R18 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 - 90 is height of the tyre, which is calculated as 90% of the tyre width (155mm), which means the sidewall height has 139.5 mm. The wheel diameter is R18, which means it fits to a 18 inch/457.2mm diameter wheel. The total circumference of the tyre is mm, which is very similar to 245/60 R18(2359.96 mm), 175/70 R13(1807.04 mm), 255/35 R19(2076.91 mm), 185/55 R14(1756.46 mm), 255/45 R18(2157.33 mm), 185/70 R14(1930.82 mm), 255/60 R17(2317.87 mm).