I think for the price you get what you pay for. But our website mechanic bought the kit a few months ago and the bearing failed after a few weeks. So I bought another set to replace the bad one and have some spares and the one I installed is already showing signs of bearing wear. I have a small van that I haul stuff in and sometimes it doesn't exceed 100-150#. But it's all done on smooth, finished floors, and they don't seem to support the weight. I will definitely look for alternative replacement parts rather than buying them again.