275/45 R18 doesn't belong to the most popular dimensions for winter tyres - there are 5 tyre models available, which can be compared to
155/60 R15,
170/60 R17,
160/60 R14. Let's break down the sizing - 45 is height of the tyre, which is calculated as 45% of the tyre width (275mm), which means the sidewall height has 123.75 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 2213.88 mm, which is very similar to 225/55 R18
(2213.88 mm), 245/35 R21
(2214.51 mm), 285/30 R21
(2212.94 mm), 245/40 R20
(2211.68 mm), 215/75 R15
(2210.11 mm), 245/45 R19
(2208.85 mm), 275/40 R19
(2207.28 mm). There are multiple speed indexes available for winter tyres in 275/45 R18: V
(240km/h). The same goes for weight indexes: 103, 107.
Upper-middle
'26#8
'25#4
'25#5
