“These seem well-made (though I wish the base was a bit thicker) and installed easily under all 4 tires without sliding or shifting position on the garage floor. Of all the similar products I researched, these were the only ones I found which were available for smaller diameter tires (others were only designed for taller tires or didn't state at all the tire size for which they were intended). Logically, seems like they should prevent flat spots - we'll find out when the car comes out of the garage in May!”
