Search new + high quality used 315 35 R21 Bridgestone tires online, starting at: $83.79. 315 35R21 Bridgestone models in stock: 2. Summer: 7. Run flat: 6. 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!