Search new + high quality used tires online. Size 235 40 ZR18 starting at: $47.99. Tires in stock: 74. Available brands: 25 with 42 models. All season: 42. Summer: 32. 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!