I'm getting quotes for snow tires, and the dealership is telling me that I can't go with steel rims as the 2010 Prius' are too heavy, and I need to remount the snow tires on the factory aluminum rims as they are stronger. Because of the weight, they say the steel rims are not safe. I've searched for over an hour and can't find any mention of this anywhere else on the forums, and I've see plenty of discussion about people using steel rims on their Prius'. Is there any truth to this?