245/70 R17.5 - Best summer tyres 2025 - market overview, tests, reviews

245/70 R17.5 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 (245mm), which means the sidewall height has 171.5 mm. The wheel diameter is R18, which means it fits to a 18 inch/457.2mm diameter wheel. The total circumference of the tyre is mm, which is very similar to 225/60 R15(2045.18 mm), 295/45 R20(2430.02 mm), 225/75 R16(2337.03 mm), 325/30 R21(2288.34 mm), 235/45 R18(2100.78 mm), 235/55 R19(2328.23 mm), 235/70 R16(2310.33 mm). There are multiple speed indexes available for summer tyres in 245/70 R17.5: H(210km/h). The same goes for weight indexes: 110, 136, 143.