My experance with wheel hop on my Model A. I have Michalin tube type radials on 35 wires on 40 drums. I didn't have the spacers, We never gave that a thought yr's ago. They went fine up to about 55mph and then they started bounceing up and down. I thought it was my wheel bad. SO, I mounted the tires on a set of steel 40 wheels. Same problem. I borrowed a Hunter wheel balancer and spun the wheels on the car. The wheel ran out of round quite a bit. I removed the wheels and took a 2ft. carpenter square, layed it on the floor and up against one of the studs on the drum. I turned the drum and found square would miss the stud on the other side about 1/8in. My wheel stud patten was out around. No balanceing in the world is going to fix an out around tire, wheel, or drum stud patten. I'm still trying to locate a decent set of front drums. Walt
