Ordered two continental tyres from oponeo and when fitted felt vibration in the car, took back to garage as thought they hadn’t torqued up properly only to find one tyre is badly affected. Disputed with oponeo who said they had to review it with their expert before contacting Germany. They came back saying nothing wrong with tyre and to turn it 180 degrees on the wheel and it should sort out the problem. I took a video of it and an expert garage told me it is because of a flat spot in the tyre because the tyres are not being sold quickly and are stood up instead of on their side and develop a flat spot. Don’t buy tyres from here please use somewhere else. These guys are the worst I have come across no apology or help. Watch out for old tyres sitting in stock and sold cheaply. My eyes were turned.