Search new + high quality used tires online. Size 305 50 R20 starting at: $94.8. Tires in stock: 13. Available brands: 6 with 7 models. All season: 12. 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!