Search new + high quality used tires online. Size 305 30 ZR20 starting at: $62.53. Tires in stock: 61. Available brands: 6 with 28 models. Summer: 61. 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!