Tires are one of the highest car expenses, but there are ways to save money. Goodyear and Firestone brands both offer coupons for new tires. In addition, many tire chain stores also offer coupons periodically. If you know that you will need tires in the next year, begin keeping an eye out for these deals. They usually are offered in October and April, when the weather is mild and fewer people are thinking about their tread.