Search new + high quality used tires online. Size 255 50 ZR20 starting at: $43.22. Tires in stock: 27. Available brands: 11 with 12 models. All season: 26. 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!