Search new + high quality used tires online. Size 285 40 R21 starting at: $43.01. Tires in stock: 194. Available brands: 9 with 24 models. All season: 123. Winter: 7. Summer: 64. Run flat: 1. 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!