215/40 R18 doesn't belong to the most popular dimensions for allround tyres - there are 0 tyre models available, which can be compared to
155/60 R15,
170/60 R17,
160/60 R14. Let's break down the sizing - 40 is height of the tyre, which is calculated as 40% of the tyre width (215mm), which means the sidewall height has 86 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 1976.69 mm, which is very similar to 245/35 R18
(1975.12 mm), 195/70 R14
(1974.81 mm), 180/55 R17
(1978.58 mm), 185/60 R16
(1974.18 mm), 245/40 R17
(1972.29 mm), 205/60 R15
(1969.78 mm), 225/50 R16
(1983.6 mm). There are multiple speed indexes available for allround tyres in 215/40 R18: V
(240km/h), W
(270km/h), Y
(300km/h). The same goes for weight indexes: 89. You can find 215/40 R18 on 9 car models - mainly .