Review on Bubble Wheel Balancer Portable Trucks by Jeffery Pricinoc

Works well but the center pin is difficult to get into the center hole and I think a little more effort could have been put into it. I drilled the hole a little deeper to the pin stayed centered and had several adapters to keep the wheel centered. If you have large center holes in the wheel, you have no way of centering the wheel on the wheel balancer and you will never get an accurate reading