Search new + high quality used tires online. 18 Inch Tires, starting at: $18.89. Tires in stock: 41419 tires. Available brands: 254 with 2246 models in 161 sizes. All season: 37080. Winter: 3027. Summer: 2161. Run flat: 1479. 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!