195/40 R17 - Best summer tyres 2025 - market overview, tests, reviews

195/40 R17 doesn't belong to the most popular dimensions for summer tyres - there are 8 tyre models available, which can be compared to 160/70 R17, 215/35 R18, 205/40 R17. Let's break down the sizing - 40 is height of the tyre, which is calculated as 40% of the tyre width (195mm), which means the sidewall height has 78 mm. The wheel diameter is R17, which means it fits to a 17 inch/431.8mm diameter wheel. The total circumference of the tyre is 1846.63 mm, which is very similar to 165/70 R14(1842.86 mm), 195/60 R14(1852.28 mm), 205/50 R15(1840.97 mm), 205/45 R16(1856.37 mm), 175/60 R15(1856.68 mm), 185/55 R15(1836.26 mm), 185/50 R16(1857.94 mm). There are multiple speed indexes available for summer tyres in 195/40 R17: V(240km/h), W(270km/h). The same goes for weight indexes: 81.