Search new + high quality used tires online. Size 285 40 R21 starting at: $43.01. Tires in stock: 187. Available brands: 12 with 25 models. All season: 125. Winter: 15. Summer: 47.. 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!