Search new + high quality used tires online. Size 235 40 R18 starting at: $51.79. Tires in stock: 991. Available brands: 77 with 213 models. All season: 788. Winter: 69. Summer: 134. Run flat: 43. 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!