Search new + high quality used tires online. Size 255 50 ZR20 starting at: $47.99. Tires in stock: 30. Available brands: 11 with 12 models. All season: 28. Summer: 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!