235/70 R18 - Best winter tyres 2025 - market overview, tests, reviews

235/70 R18 doesn't belong to the most popular dimensions for winter tyres - there are 2 tyre models available, which can be compared to 155/60 R15, 170/60 R17, 160/60 R14. Let's break down the sizing - 70 is height of the tyre, which is calculated as 70% of the tyre width (235mm), which means the sidewall height has 164.5 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 2469.92 mm, which is very similar to 285/40 R22(2471.81 mm), 315/40 R21(2467.41 mm), 275/55 R19(2466.46 mm), 255/55 R20(2477.15 mm), 275/65 R17(2479.66 mm), 275/50 R20(2459.87 mm), 285/45 R21(2481.54 mm). There are multiple speed indexes available for winter tyres in 235/70 R18: V(240km/h). The same goes for weight indexes: 110.