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Derailleurs work off of tension, and this is
the reason that they are designed with High
and Low Limiter screws. The High and Low
Limiters essentially act as boundaries so that
no matter how much tension you put into
or take off the shifter cable, the derailleur will
not go past the largest or smallest gears. The
High (H) screw is the limiter for the largest
gear, and the Low (L) screw is the limiter for
the smallest gear.
NOTE
COUNTERCLOCKWISE
CLOCKWISE
Turning the L & H counterclockwise shortens
the range where the derailleur cage can travel.
Turning the L & H clockwise increases the
range where the derailleur cage can travel.
L H
L H
06
Now, let’s check the H limit screw. Begin by shifting the
derailleur to 3rd gear. While turning the pedals, shift into
3rd gear. If the chain does not fall off the largest chain-
wheel when shifting into 3rd gear, the H limit screw is
close to proper positioning.
LIMITER SCREWS
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