Search new + high quality used tires online. Size 315 680 R18 starting at: $119.38. Tires in stock: 16. Available brands: 1 with 1 models. All season: 12. Summer: 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!