Search new + high quality used tires online. Size 285 40 R21 starting at: $41.82. Tires in stock: 166. Available brands: 13 with 28 models. All season: 100. Winter: 16. Summer: 50.. 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!