On my first rear tire change I had it balanced ...my last 5, I didn't and had No issues .....Car tires are better constructed and have better quality control, so I don't think the rear tire needs balancing .....Mike :thumbup:
You are probably right the rear with a car tire is much truer that the original tire. I did purchase a set of three Centralmatic balancers and do have the one on the rear. I had my Federal front tires balanced with a real good automotive balancer and have not put the balancers on the front. It sure rides real smooth.