Search new + high quality used 235 55 R18 Continental tires online, starting at: $47.99. 235 55R18 Continental models in stock: 14. All season: 44. Winter: 2. Summer: 1. Run flat: 11. 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!