Search new + high quality used 275 40 R21 Hankook tires online, starting at: $47.99. 275 40R21 Hankook models in stock: 2. Summer: 15. Run flat: 12. 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!