Search new + high quality used tires online. Size 235 40 R18 starting at: $51.4. Tires in stock: 276. Available brands: 44 with 109 models. All season: 229. Winter: 15. Summer: 32. Run flat: 9. 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!