The price of tires has risen by about 40 percent in the past five years. That’s partly because rubber prices have gone up. But it’s also due to a tariff that the U.S. on Chinese tire imports. As tire prices have risen, more people have been renting tires rather than buying them outright. And renting tires, it turns out, is often a bad deal in the long run. On today’s show: How a celebrated attempt to help one group of people ended quietly hurting a much larger group. Also on the show: The Grizz.