As I said, you don't need to replace both tyres if the other is in good, new condition. I don't know about you, but my tyres wear pretty evenly on both axles - anything else is an alignment issue. The reason for putting new tyres on the rear of the car is not because it loses grip first, but rather because of the event losing grip at the rear causes. Understeer is reasonably predictable and straightforward to recover. Oversteer, on the other hand, can be sudden and is much more difficult for the average driver to recover from. I've done my ARDS course, along with a few other things, and would far rather understeer than the snap oversteer my vRS exhibits at the limit. The Karoq is indeed not a performance vehicle, but driving through standing water at 70mph on a soaking wet motorway, I know which tyres I'd rather have. As with everything, every example is unique and requires the application of common sense. The general rule of thumb, as I said above, is to not mix tyre brands, types or wear, and to fit new tyres to the rear axle.