255/30 R19 doesn't belong to the most popular dimensions for winter tyres - there are 2 tyre models available, which can be compared to
155/60 R15,
170/60 R17,
160/60 R14. Let's break down the sizing - 30 is height of the tyre, which is calculated as 30% of the tyre width (255mm), which means the sidewall height has 76.5 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 1996.8 mm, which is very similar to 175/80 R14
(1996.8 mm), 255/35 R18
(1997.11 mm), 255/40 R17
(1997.42 mm), 170/60 R17
(1997.42 mm), 195/65 R15
(1993.34 mm), 205/50 R17
(2000.57 mm), 225/45 R17
(1992.71 mm). There are multiple speed indexes available for winter tyres in 255/30 R19: V
(240km/h), W
(270km/h). The same goes for weight indexes: 91.
