Search new + high quality used tires online. Size 275 45 R21 starting at: $26.74. Tires in stock: 102. Available brands: 9 with 24 models. All season: 91. Winter: 9. Summer: 2.. 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!