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 225/35 R18(1931.14 mm), 285/45 R20(2401.75 mm), 225/50 R16(1983.6 mm), 295/30 R20(2151.99 mm), 225/60 R16(2124.97 mm), 305/25 R20(2075.02 mm), 235/30 R20(2038.89 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.