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

145/70 R12 doesn't belong to the most popular dimensions for summer 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 225/45 R17(1992.71 mm), 295/25 R20(2059.31 mm), 225/55 R18(2213.88 mm), 295/40 R20(2337.34 mm), 225/70 R15(2186.55 mm), 315/40 R21(2467.41 mm), 235/40 R19(2106.75 mm). There are multiple speed indexes available for summer tyres in 145/70 R12: S(180km/h), T(190km/h). The same goes for weight indexes: 69.