Definitions for "Chainring"
Large cog wheels at the front end of the drivechain, driven by the pedals. Mercury has three - a 52 tooth ring, a 42 tooth ring and a 30 tooth ring. A combination of small front with large rear sprockets mean a low gear, and vice versa.
a gear at the front, attached to the cranks.
a toothed sprocket attached to the crankarm.