Search new + high quality used tires online. Size 305 30 ZR20 starting at: $67.5. Tires in stock: 53. Available brands: 6 with 24 models. Summer: 53. Run flat: 15. 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!