I absolutely LOVE these rollers! We tried many different ones and got very tired of disassembling everything to replace or fix broken and bent wheels. Use these heavy-duty rollers. They are amazing! They roll very gently, are firmly fixed and can withstand an insane weight. In the above selection, my mobile woodworking shop weighs around 800 pounds and the wheels are easy to prop up and roll. I can be very difficult to please and I love these bikes. You will not be disappointed!