What types available on the market?
Front sprockets
The main material for most front sprocket is high quality steel. This makes it durable and cheap and because the size is relatively small, the rotation mass is irrelevant. Since most of the time the front sprocket is not visible, the main characteristic of the sprocket is based on performance rather than appearance.
Standard
Self-Cleaning:
Special millings between the teeth, give some self-cleaning effect as dirt and oil can't stick to this surface as good. This will provide longer lifetime for not just the front sprocket, but the whole power line.
Rubber cushed
The centre of sprocket is connected to the outer teeth with a flexible rubber cushed connection. This makes the transition smoother.
