How to adjust a campagnolo rear derailleur
In business since 1933, Campagnolo is synonymous with quality bicycle components. Each one of its component groups includes a rear derailleur--the mechanism responsible for shifting the chain on each of the bicycle's rear sprockets.
The derailleur is adjusted during its installation and later as its cable stretches and shifting grows less precise. Proper adjustment allows the derailleur to transfer the chain efficiently to each of the sprockets.
Place the bicycle into a bicycle tuning stand. A tuning stand allows the bicycle to be safely worked on without the danger of the bicycle tipping over or becoming scraped by leaning against a wall.
Shift the bicycle into its highest gear combination with the Campagnolo gear shifters. The highest gear combination places the chain on the smallest rear sprocket and largest front chain ring.
Check the position of the upper derailleur pulley. The derailleur has two pulleys. The upper pulley should be in perfect line with the smallest sprocket. To adjust the alignment, proceed to Step 4. If the alignment is fine, skip to Step 5.
Locate the two screws on the side of the Campagnolo derailleur. Use a Phillips head screwdriver to turn the screw closest to the front of the bike in the proper direction. Turn the screw clockwise to move the derailleur pulley in towards the bike. Turn the screw counterclockwise to move the pulley away from the bike. Turn the screw until the pulley and sprocket are in line with one another.
Use the rear Campagnolo gear shifter to shift the chain onto each of the rear sprockets. If the chain stalls, the derailleur cable needs to be tightened. Proceed to Step 6. Otherwise, skip to Step 7.
Twist the cable tension adjuster in towards the bike one full turn. The adjuster is located at the end of the derailleur cable, where the cable enters the Campagnolo derailleur. Cable tension allows the derailleur to pivot the chain onto the larger sprockets.
Shift the chain into its smallest gear combination with the Campagnolo gear shifter. The lowest gear combination places the chain on the largest rear sprocket and smallest front chain ring.
Check the position of the upper derailleur pulley once again. The pulley should be in perfect line with the largest sprocket. To adjust the position of the pulley, proceed to Step 9.
Observe the two screws on the side of the Campagnolo derailleur. Use the Phillips head screwdriver to turn the screw closest to the rear of the bike in the proper direction. Turn the screw clockwise to move the pulley away from the bike. Turn the screw counterclockwise to move the pulley towards the bike. Turn the screw until the upper derailleur pulley is aligned with the largest sprocket.