Search new + high quality used tires online. Size 235 40 R20 starting at: $353.92. Tires in stock: 4. Available brands: 3 with 3 models. All season: 1. Summer: 3.. 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!