145/70 R12 - Best winter tyres 2025 - market overview, tests, reviews

145/70 R12 doesn't belong to the most popular dimensions for winter tyres - there are tyre models available, which can be compared to 325/30 R21, 155/60 R15, 155/65 R13. Let's break down the sizing - 70 is height of the tyre, which is calculated as 70% of the tyre width (145mm), which means the sidewall height has 101.5 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 mm, which is very similar to 245/40 R20(2211.68 mm), 165/70 R14(1842.86 mm), 245/50 R20(2365.62 mm), 175/65 R14(1831.86 mm), 255/30 R20(2076.59 mm), 180/65 R16(2011.88 mm), 255/40 R21(2316.61 mm). There are multiple speed indexes available for winter tyres in 145/70 R12: Q(160km/h), T(190km/h). The same goes for weight indexes: 69.