Front derailleurs at cheap prices from starbike.com
Together with the rear derailleur
the front derailleur is responsible for the gear ratio of derailleur shift systems.
The front derailleur moves the chain
on one of
the chainrings in order to transfer the power at an efficient pedaling frequency
into the rear wheel
are being actuated from a handlebar
thru a cable.
Front derailleurs for mountainbikes come in three different versions:
- „Top Pull“ models, where the cable comes from the top tube of the frame
- „Down Pull“ or „Bottom Pull“ models, where the cable routing goes along the chainstay
- „Dual Pull“ types, where the cable can come from both directions
The required type depends on the cable routing of the bike frame
On a road bike
the cable usually comes from underneath
can feature both cable routing types.
Another distinction of MTB front derailleurs is their cage position.
Down swing front derailleurs have the cage below the clamp, while top swing models have the cage above it.