Search new + high quality used tires online. Size 285 50 R20 starting at: $115.54. Tires in stock: 15. Available brands: 6 with 10 models. All season: 13. Winter: 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!