In asking around at different shops I have yet to find anyone who will put a car tire on my bike. I understand. Who does tires here in Sacramento/surrounding area? Maybe I'll go to GWRRA meeting and talk around.
Are you asking them, " Will you mount a car tire on my motorcycle rim ? ". Take your 16 in. rim with the motorcycle tire on it that came off the custom trailer you bought as a fixer upper and your car tire to a Goodyear tire shop and have it mounted. Have them throw in 3 oz. of Dyna-Beads ( that you supply ) before they finish seating the tire. Have them add 32 psi. of air to it. Tip the mechanic and pay the $10-$15 at the front desk. Go home and mount it and then have a nice ride.