245/55 R18 doesn't belong to the most popular dimensions for summer 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 - 55 is height of the tyre, which is calculated as 55% of the tyre width (245mm), which means the sidewall height has 134.75 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 2283 mm, which is very similar to 225/60 R18
(2284.57 mm), 275/35 R21
(2280.48 mm), 245/50 R19
(2285.82 mm), 275/40 R20
(2287.08 mm), 325/30 R21
(2288.34 mm), 215/80 R15
(2277.65 mm), 245/45 R20
(2288.65 mm). There are multiple speed indexes available for summer tyres in 245/55 R18: V
(240km/h). The same goes for weight indexes: 103.
