Search new + high quality used 305 30 ZR20 Michelin tires online, starting at: $88.89. 305 30ZR20 Michelin models in stock: 10. Summer: 28. Run flat: 12. Selling all used tires at discount costs. All used tires go through 2 layers of inspection on specialized equipment. One year warranty + free shipping on all inventory ;) Happy shopping!