Search new + high quality used tires online. Size 245 40 R21 starting at: $45.75. Tires in stock: 24. Available brands: 6 with 10 models. All season: 4. Summer: 20. 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!