275/45 R19 doesn't belong to the most popular dimensions for winter tyres - there are 11 tyre models available, which can be compared to
170/80 R15,
165/70 R13,
325/30 R21. 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 R19, which means it fits to a 19 inch/482.6mm diameter wheel. The total circumference of the tyre is 2293.68 mm, which is very similar to 225/55 R19
(2293.68 mm), 245/40 R21
(2291.48 mm), 215/75 R16
(2289.91 mm), 245/45 R20
(2288.65 mm), 315/35 R20
(2288.65 mm), 325/30 R21
(2288.34 mm), 275/40 R20
(2287.08 mm). There are multiple speed indexes available for winter tyres in 275/45 R19: Q
(160km/h), V
(240km/h), W
(270km/h). The same goes for weight indexes: 108.
