[madmaxx]

They must be out of round or inconsistent sidewall stiffness. Road force balance should address the sidewall stiffness variation or indicate the tire or rim is out of spec. It is not the balance, rember you can balance a ceiling fan but I dont you can roll down the road on it LOL. If rim is concetric to within .008" and true (side to side)to within .008" then you must look at tire.