245/45 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 - 45 is height of the tyre, which is calculated as 45% of the tyre width (245mm), which means the sidewall height has 110.25 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 165/65 R13
(1711.23 mm), 245/45 R20
(2288.65 mm), 175/55 R15
(1801.7 mm), 245/70 R17
(2434.11 mm), 175/75 R16
(2101.41 mm), 255/40 R18
(2077.22 mm), 185/55 R16
(1916.06 mm). You can find 245/45 R18 on 29 car models - mainly .
