Search new + high quality used tires online. Size 255 50 ZR20 starting at: $33.19. Tires in stock: 45. Available brands: 14 with 14 models. All season: 39. Summer: 6.. 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!