Search new + high quality used tires online. Size 31 71 -18 starting at: $73.65. Tires in stock: 3. Available brands: 1 with 2 models. All season: 2. Summer: 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!