275/45 R22 doesn't belong to the most popular dimensions for winter tyres - there are 1 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 R22, which means it fits to a 22 inch/558.8mm diameter wheel. The total circumference of the tyre is 2533.07 mm, which is very similar to 235/85 R16(2531.81 mm), 265/75 R16(2525.53 mm), 265/70 R17(2522.07 mm), 285/65 R17(2520.5 mm), 265/65 R18(2518.61 mm), 285/60 R18(2510.76 mm), 255/70 R18(2557.88 mm). There are multiple speed indexes available for winter tyres in 275/45 R22: V(240km/h), W(270km/h). The same goes for weight indexes: 112, 115.