235/40 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 - 40 is height of the tyre, which is calculated as 40% of the tyre width (235mm), which means the sidewall height has 94 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 215/55 R16
(2019.73 mm), 285/25 R20
(2043.61 mm), 215/70 R15
(2142.57 mm), 285/35 R22
(2382.27 mm), 225/35 R20
(2090.73 mm), 285/60 R18
(2510.76 mm), 225/50 R18
(2143.19 mm). You can find 235/40 R18 on 34 car models - mainly .
