Why you want to drive that much overdrive? A 4mm smaller tyre means less driving time. Ok, I know that the rear tyres wear harder than the front one’s, but to change the overdrive and use smaller tyres is not the way we should go. When you have a traction-roll problem, and you had to use smaller rear tyres like 60 the front tyres must be 56. So the driving time is nearly zero. With the 710 the rear tyre wear is better then with the 705. Every time a car slides, the tyre wear’s. The 710 is more in balance, so the rear don’t slides that much. It’s still more than the front tyres.