Orbea ALMA Manuel D'instructions Et D'entretien page 48

- Position the upper jockey wheel of the rear derailleur in line with the smallest cog using the
outer limit screw (H).
- Position the jockey wheel of rear derailleur in line with the largest cog using the inner limit
screw (L).
To confirm, try pedaling with all of the chainring-cog combinations possible.
- If the rear derailleur makes noise or the chain does not shift from one cog to another smoothly
in the intermediate positions, turn the barrel adjustment (located on the shifting lever, or on the
derailleur itself) to achieve the optimum adjustment.
- If the chain falls from the outside cog, tighten the outer limit screw (H) one quarter of a turn.
- If the chain cannot shift to the outside cog, from the outside cog, loosen the outer limit screw
(H) one quarter of a turn.
- If the chain falls from the inside cog towards the spokes, tighten the inner limit screw (L) one
quarter of a turn.
- If the chain cannot shift to the inside cog, loosen the inner limit screw (L) one quarter of a turn.
If the cassette cannot be aligned as indicated, take the bicycle to your authorized dealer.
Optimizing use of the rear derailleur
If your bike is equipped with a double or triple chainring kit, you will be able to ride anywhere
easily, saving your strength and maintaining a uniform pedal stroke regardless of the terrain or
your speed.
However, to avoid any mechanical issues, (chain skipping, noise when pedaling, etc.) follow
these recommendations:
- Select the correct gear by shifting just before the start of an ascent or the obstacle you are
maneuvering.
- When you are about to shift gears, keep pedaling normally without excessive force and use the
shifting levers until the chain is correctly positioned on the desired cog and chainring.
- Avoid shifting when straining, even if the synchronized systems allow for it in a tough situation.
- Strictly avoid extreme combinations, such as the inner chainring with the two outermost cogs,
or outer chainring with the two innermost cogs. These situations, as shown in the figure below,
lead to a diagonal chain line that jeopardizes the performance of the drivetrain and durability of
your components (premature wear).
Replacing the gear wire:
- Position the chain on the inner chainring and outer cog.
- Loosen the pinch bolt holding the wire and pull it through the shifting lever.
- If you cannot access the wire due to the type of shifter, talk to your dealer.
- Inspect the housing. Change it if it is worn or rusted.
- Grease the new wire and insert it through the lever and all guides and housing.
- Follow the instructions for adjusting the cassette.
- Cut the wire so that it does not overhang more than 5cm from the pinch bolt.
- Attach a metal end cap to the wire to prevent the end from fraying.
Lubrication
Every month, lubricate all of the pivot points of both the front and rear derailleurs, as well as on
the jockey wheels.
Any wires that have been replaced must be lightly greased in those areas where it passes
through housing or rubs against anything.
48