Search new + high quality used tires online. 20 Inch Tires, starting at: $1. Tires in stock: 8363 tires. Available brands: 186 with 1129 models in 119 sizes. All season: 6960. Winter: 329. Summer: 1139. Run flat: 461. 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!