I had a set of street wheels & tires that I sold Monday, I did get a little better mileage when they were on but the overall comparison was minimal. When I considered things like storage space, tire life (even when not in use) time to swap back and forth and the cost to buy four more street tires when they wore out I figured it would be cheaper to just pay a little more for the gas.

If you get even 5 mpg better mileage with the street tires you are only saving about $5.00 per fill up, and if the street tires run $120.00 per tire ($480.00 for a set of 4) it would take almost 100 fill ups to pay for the extra set of tires.