The front derailleur is the mechanism that shifts your chain from chainring to chainring. It moves from side to side as you click your front shift lever, carrying the chain along with it.
Front Derailleur Clamp in brilliantly polished silver from SunXCD. Now easily mount the new generation Braze-On Front Derailleurs to your bike, which has the clamp-on Front Derailleurs. About SunXCD: Junzo...