Search new + high quality used tires online. Size 285 40 R21 starting at: $34.55. Tires in stock: 153. Available brands: 14 with 33 models. All season: 104. Winter: 9. Summer: 40. Run flat: 3. 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!