Search new + high quality used 235 55 R18 GT Radial tires online, starting at: $48.82. 235 55R18 GT Radial models in stock: 5. All season: 9. Winter: 5.. 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!