Fit A Bike’s Front Derailleur
Introduction
A front derailleur doesn't have much adjustment so getting it in the right position is important.
Step 1
Height
Set the front derailleur so that the outer plate of the derailleur cage – the metal plates that the chain passes through – is 2mm above the big chain-ring and lock it half-tight.
Step 2
Check
Work the front derailleur manually to check it won’t touch the chain-rings anywhere in it’s range of movement. In case of inteference raise the derailleur as little as possible to eliminate the clash.
Step 3
Horizontal Alignment
Set the cage plates exactly parallel to the chain-rings.
Step 4
Lock the front derailleur
Tighten the fixing or the clamp bolt to lock the front derailleur in place.