Search new + high quality used tires online. Size 285 45 ZR21 starting at: $48.65. Tires in stock: 18. Available brands: 3 with 6 models. All season: 9. Summer: 9.. 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!