165/70 R12 doesn't belong to the most popular dimensions for winter tyres - there are 0 tyre models available, which can be compared to 155/60 R15, 170/60 R17, 160/60 R14. Let's break down the sizing - 70 is height of the tyre, which is calculated as 70% of the tyre width (165mm), which means the sidewall height has 115.5 mm. The wheel diameter is R12, which means it fits to a 12 inch/304.8mm diameter wheel. The total circumference of the tyre is 1683.27 mm, which is very similar to 155/65 R13(1670.38 mm), 165/65 R13(1711.23 mm), 155/70 R13(1719.08 mm), 160/60 R14(1720.34 mm), 165/60 R14(1739.19 mm), 195/45 R15(1748.3 mm), 155/65 R14(1750.18 mm).