For those who are wondering about the responses from Continental:
First, you have to realize that answering questions for non-standard fitments opens the door to legal liabilities. Any deviation from what is listed on the vehicle tire placard creates an opportunity for some enterprising lawyer. Tire manufacturers are fully aware of this and will be incredibly cautious about what the say - and especially about what they will "recommend".
Second, the tire in question is a "C type" tire - the European equivalent of an LT type tire. It can be used on trailers, but care has to be taken regarding loading. The way Continental worded their comment indicates that they want YOU to do the homework. THEY don't want to be held liable for a mis-application.