Through tomorrow, March 12th, you can save big on Michelin Tires at Costco! Instantly save $70 on any set of 4 Michelin Tires plus, installation is just $0.01 per tire! that is a savings of $59.96. Giving you a total saving of $129.96! Use promo code MICHELIN17MAR if shopping online. If shopping in-store the offer is already valid.