225/55 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 - 55 is height of the tyre, which is calculated as 55% of the tyre width (225mm), which means the sidewall height has 123.75 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 155/65 R14
(1750.18 mm), 245/35 R19
(2054.92 mm), 160/70 R17
(2060.26 mm), 245/45 R17
(2049.26 mm), 165/80 R13
(1866.73 mm), 245/60 R18
(2359.96 mm), 175/65 R15
(1911.66 mm). You can find 225/55 R18 on 24 car models - mainly .
