Today I started trial-fitting 17" moped wheels and Michelin tires onto my motorized bicycle. LBS said it's gonna be a major project.
After sleeping on it, I decided to have the LBS respoke the moped rims to the bicycle hubs with 13-14g SS spokes. Should be much easier and cheaper. My bike hasn't broken any spokes in a year, and it uses OEM SS 14g spokes front and rear.