These Vredestein had covered just over 6000 miles in 2.5 years. I heard a knocking sound developing from the OSF which I could also feel through the the steering wheel. On inspecting the tyres, both fronts had developed a crack on the outer wall, and when the OSF wheel was removed, I discovered a huge bulge and 6 cracks on the inner sidewall. The bulge was clearly expanding and hitting the road surface as the rotational speed increased - there were actually signs of wear on the sidewall where this had been hitting the road!
The NS had one small crack on the outer wall but when the wheel was removed from the car, the inner wall it had 2 cracks, one of which was huge and another massive bulge. Neither tyres had run flat damage on the tyre inner which is not surprising as the pressures have always been spot on. There were probably 15000 miles left in terms of life, but had to get them changed immediately. I have never seen anything like this and have raised a warranty claim with Vredestein but I hold out little hope of them being supportive. Naturally, I'll never purchase Vredestein tyres again.