Search new + high quality used tires online. Size 285 50 R20 starting at: $47.99. Tires in stock: 67. Available brands: 24 with 30 models. All season: 61. Winter: 5. 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!