Search new + high quality used tires online. Size 285 40 R21 starting at: $44.1. Tires in stock: 130. Available brands: 17 with 39 models. All season: 76. Winter: 6. Summer: 48.. 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!