255/45 R17 - Best tyres 2025 - market overview, tests, reviews

255/45 R17 doesn't belong to the most popular dimensions for 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 - 45 is height of the tyre, which is calculated as 45% of the tyre width (255mm), which means the sidewall height has 114.75 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 mm, which is very similar to 285/35 R22(2382.27 mm), 225/35 R20(2090.73 mm), 285/60 R18(2510.76 mm), 225/50 R18(2143.19 mm), 295/35 R20(2244.67 mm), 225/60 R18(2284.57 mm), 315/30 R22(2349.28 mm).