I bought new tires for about 2.000 for a r15 wheel in 15, skated 4 seasons or more than 40t. km city - intercity from November to March. For all the time I did not receive a single defect. Compared to Continental, these tires are somewhat noisier and that's all. Continental took in 10 for 3.5t. r also skated 4 seasons. I see no reason to pay more.