I don't know much about cars and me asking this is kinda "dumb" but I need to know. I notice that some people have like those tires that have those plain, dull, no hub cap tires on the front wheel. Then they leave their nice stylish rims on the rear wheel. I think someone told me that it's called "donut" wheels (the ones in the front with the dull look). I just want to get some clearification on this if someone could answer my noobish question.
Is there some kind of special purpose for that?