265/65 R18 - Best summer tyres 2025 - market overview, tests, reviews

265/65 R18 doesn't belong to the most popular dimensions for summer tyres - there are 7 tyre models available, which can be compared to 155/60 R15, 160/60 R18, 165/60 R14. Let's break down the sizing - 65 is height of the tyre, which is calculated as 65% of the tyre width (265mm), which means the sidewall height has 172.25 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 2518.61 mm, which is very similar to 285/65 R17(2520.5 mm), 265/70 R17(2522.07 mm), 265/75 R16(2525.53 mm), 285/60 R18(2510.76 mm), 235/85 R16(2531.81 mm), 285/50 R20(2491.28 mm), 275/70 R16(2486.26 mm). There are multiple speed indexes available for summer tyres in 265/65 R18: H(210km/h), S(180km/h), T(190km/h). The same goes for weight indexes: 112, 114, 117.