225/60 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 - 60 is height of the tyre, which is calculated as 60% of the tyre width (225mm), which means the sidewall height has 135 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 175/60 R15
(1856.68 mm), 255/30 R19
(1996.8 mm), 180/55 R17
(1978.58 mm), 255/40 R20
(2236.81 mm), 185/60 R15
(1894.38 mm), 255/55 R18
(2317.55 mm), 190/50 R17
(1953.44 mm). You can find 225/60 R18 on 12 car models - mainly .
