Search new + high quality used 235 50 R18 Goodyear tires online, starting at: $48.82. 235 50R18 Goodyear models in stock: 11. All season: 22. Winter: 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!