16.5 tire options?

Thank-you all for the comments and advice so far. I had not thought of 17" tires, figured 16" was the best bet. My idea on using the 15" was that the tires could then be swapped onto regular rims for a car. Now we add the price of tires AND rims...I did find new 16.5" tires from some company I never heard of before, maybe India? Sounds like the best plan of action is to look for 17" take-offs on Craigslist,tire stores or dealerships. Thanks again! Bob