Search new + high quality used tires online. Size 255 40 R21 starting at: $37.91. Tires in stock: 222. Available brands: 12 with 34 models. All season: 35. Winter: 17. Summer: 170. 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!