Search new + high quality used 325 30 R21 Dunlop tires online, starting at: $121.05. 325 30R21 Dunlop models in stock: 2. Summer: 7. Run flat: 4. 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!