Follow the ebb and flow of bike styling at Bike Work's large Chainwheel Archive.
Many say chainwheel, some speak of crankwheels, or front sprockets. Others call them stars, plates, and rings.
In French, plateaux;
in Spanish, platos;
in Italian, ingranaggi;
in German, Kettenrader;
in Dutch, kettingbladen.
See the Chainrings and Saddles too!