How To Adjust 105 Rear Derailleur. Shift your chain into the biggest chainring and smallest cog then loosen the cable clamp bolt where the cable attaches to the derailleur. Because of its low profile and single tension construction the derailleur does not hit the chain stay in rough riding conditions.
Turn the cable adjustment bolt located on the cable leading to the front derailleur counter clockwise about three turns. Pedal to see if it shifts. Turn the top adjustment bolt to adjust so that the guide pulley is below the outer line of the smallest sprocket when viewed from the rear.
Because of its low profile and single tension construction the derailleur does not hit the chain stay in rough riding conditions.
Shift your chain into the biggest chainring and smallest cog then loosen the cable clamp bolt where the cable attaches to the derailleur. Lose the cable on the derailleur body during adjustment. If the chain does not transfer smoothly continue to turn the cable adjustment bolt until it does. The derailleur hanger is a small piece of aluminium.
