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 215/75 R15(2210.11 mm), 285/40 R19(2232.42 mm), 225/40 R19(2081.62 mm), 285/65 R17(2520.5 mm), 225/55 R17(2134.08 mm), 295/35 R21(2324.46 mm), 225/65 R17(2275.46 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.