Search new + high quality used tires online. Size 235 40 R18 starting at: $52.97. Tires in stock: 13. Available brands: 10 with 13 models. All season: 12. Summer: 1. Run flat: 1. 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!