Search new + high quality used tires online. Size 285 40 R21 starting at: $64.7. Tires in stock: 41. Available brands: 10 with 18 models. All season: 21. Winter: 6. Summer: 14.. 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!