Pretty much a mouthguard for your chainring, to protect its precious teeth against impact.
- 34T set includes 22/32T and Light Bash Guard (protects up to 34T).
- 36T set includes 24/36T and Light Bash Guard (protects up to 36T).
Bolt circle diameter
Bolt circle diameter (BCD): the diameter of an imaginary circle that intersects the centre of each chainring bolt.