How To Set A Front Derailleur. Then go back and check the operation of the rear derailleur. Check that the front derailleur is parallel to the chainring and there is a gap of around 2mm between the top.
If the derailers just need minor tweaking they are basically in adjustment but are not quite right then you adjust the one that is obviously wrong check the overall adjustment again then again adjust what needs adjusting. If your front derailleur is properly tuned your chain will shift crisply from one chainring to the next without hesitating between rings or overshooting them and jumping off the chainring set. Now the derailleur is in its closest position to the frame.
To begin shift the front derailleur to the large chainring and the rear derailleur to the largest sprocket.
A well adjusted will keep your chain on when it really counts. Start by setting the position of the front derailleur. Any more clearance than that and the derailleur tends to have issues pulling the chain down from larger gears. Then go back and check the operation of the rear derailleur.
