255/70 R17 doesn't belong to the most popular dimensions for summer tyres - there are 1 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 (255mm), which means the sidewall height has 178.5 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 2478.09 mm, which is very similar to 255/55 R20
(2477.15 mm), 275/65 R17
(2479.66 mm), 285/45 R21
(2481.54 mm), 285/40 R22
(2471.81 mm), 275/70 R16
(2486.26 mm), 315/40 R21
(2467.41 mm), 275/55 R19
(2466.46 mm). There are multiple speed indexes available for summer tyres in 255/70 R17: T
(190km/h). The same goes for weight indexes: 110, 112.
