Search new + high quality used tires online. Size 235 40 R18 starting at: $51.4. Tires in stock: 166. Available brands: 43 with 96 models. All season: 142. Winter: 5. Summer: 19. 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!