If you're carefully watching your finances, there's no denying that Costco can be a great place to shop. However, you may want to think twice before heading to the warehouse store if it's tires ...

Costco will run promotions on select tire brands. For example, right now, you can save $100 on a set of four Bridgestone tires priced at $900 or above (you'll save $60 if the price falls below ...