Continental winter tires have been winning tire tests for many years, and the 870P is no exception. The “P” stands for performance, but don’t be mistaken, its rolling resistance is also praised, making it ideal for EVs. A well-balanced tire.
255/70 R16 doesn't belong to the most popular dimensions for winter tyres - there are 15 tyre models available, which can be compared to 195/70 R15, 195/45 R15, 205/50 R16. Let's break down the sizing - 70 is height of the tyre, which is calculated as 70% of the tyre width (255mm), which means the sidewall height has 178.5 mm. The wheel diameter is R16, which means it fits to a 16 inch/406.4mm diameter wheel. The total circumference of the tyre is 2398.29 mm, which is very similar to 255/65 R17(2397.98 mm), 255/60 R18(2397.66 mm), 255/55 R19(2397.35 mm), 255/50 R20(2397.04 mm), 235/65 R18(2396.09 mm), 285/45 R20(2401.75 mm), 235/55 R20(2408.03 mm). There are multiple speed indexes available for winter tyres in 255/70 R16: H(210km/h), S(180km/h), T(190km/h). The same goes for weight indexes: 111.