Search new + high quality used tires online. Size 255 40 R21 starting at: $37.91. Tires in stock: 293. Available brands: 12 with 41 models. All season: 55. Winter: 26. Summer: 212. 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!