I have bought new Michelin snow X winter tires and installed from a dealership. Then got vibration on the floor and seats on highway. Went back and they tried several times to rebalance the tires including road force balancing. It’s better but I can still feel vibration from time to time. Vibration can be felt on the floor and seats, although not very much. The vibration is not there when speed is low. Also it’s not consistent, some time it’s better and some time it’s worse while road is similar. I have the tires on steel rims. Anyone has experiences on this? Is there always some small vibration? Or maybe it’s very difficult to balance them with steel rims? I really don’t understand why the dealership couldn’t balance it well. I have spent quite some time and drive test with the dealership and don’t want to waste more time on this