Is the chain clean and lubed? If your chain is 6 months old there is a good chance that it may be
worn. Overtime chains can stretch. This will cause the teeth of your rear cassette not to mesh correctly with
the front chainrings, wearing out the drivetrain. Check every link by bending the chain back and forth at the
Are the chainrings or cassette worn out? Conduct a visual inspection of the rear cassette and front
chainrings. If either has excessive wear you should replace both the cassette, chainrings, and chain.
Is the Derailleur Bent? Check that the rear derailleur hangs straight and vertical below the
sprockets. If it is not straight it is recommended that you take the bike to a shop in your area to have it
Are the cables in good condition? Clean cables are essential to good shifting. If the gear cables are
excessively dirty or have rust on them they chould be replaced. Cleaning and lubricate the cables and the
housing. Check the cable housing. If it is cracked, dirty, or bent. Replace cables and housing.