Less expensive brands of spare donut tires sell for $30 to $100, while more expensive brands cost more than $100, according to How Much Is It. The price of the tire depends on the model and type of car it's designed to fit.
Donut tires are temporary replacement tires, and they tend to wear out after approximately 70 miles, notes How Much Is It. Although donut tires are usually cheaper than regular full size replacement tires, the total costs of replacing a flat tire is greater because vehicle owners have to purchase a set of tires instead of one. Salvage yards sometimes have donut tires that are still usable and sell for less than retail prices.