Had a problem with the rear rim on one of the two bikes we purchased. Looks like it had been hit from the side and made the rim out of true. Told me that's a problem that can occurs because the bikes are shipped thousands of miles from Taiwan and that's something I will have to have fix my self or have a bike shop fix. Yes their price may be lower but like the old saying goes, you get what you pay for. I would go to a local bike shop the next time.