I brought exercise bike. After assemble. I tried to pedaling.it's so hard not smooth. I tried to fix in every way, it's keep stucking while pedaling and 10 times I complained about this purchase and even I chat with customers service, every time they will reply in 24hrs their teams will call me back but it's been 5days their 24hrs didn't finish yet. Careful when we buy they keeps sending updates, once you paid they will send you defective item. I will not recommend this sites to anyone. Dnt waste your money.