The Turanza T005 was introduced in 2018, but still stands as a great tyre, offered in incredible 350 different sizes. It’s universal also in it’s properties - it’s a balanced mix of wet and dry performance with above-average rolling resistance.
245/70 R17.5 doesn't belong to the most popular dimensions for summer 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 - 70 is height of the tyre, which is calculated as 70% of the tyre width (245mm), which means the sidewall height has 171.5 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 mm, which is very similar to 265/40 R20(2261.95 mm), 200/60 R17(2110.52 mm), 265/60 R18(2435.36 mm), 205/55 R15(1905.38 mm), 275/30 R20(2114.29 mm), 205/70 R15(2098.58 mm), 275/40 R20(2287.08 mm). There are multiple speed indexes available for summer tyres in 245/70 R17.5: H(210km/h). The same goes for weight indexes: 110, 136, 143.