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Below the Bar Shifters
Many of today’s more upmarket Mountain style bicycles now use a shift
lever arrangement mounted on the underside of the handlebars, which uses
two levers operated by the thumb and index finger.
To select a lower gear push the larger (lower) right shifter with your thumb
to engage a larger rear cog. One firm push shifts the chain one cog,
continuing to push will move the chain over multiple cogs. Pushing the
smaller (upper) left shifter with your index finger moves the chain from a
larger to a smaller chainwheel.
To select a higher gear push the smaller (upper) right lever with your index
finger to engage a smaller rear cog. Pushing the larger (lower) left lever
with your thumb will move the chain from a smaller to a larger chainwheel.
Hand Grip Shifters
Some bicycles are now being equipped with a shifting mechanism,
called Grip Shift , which is built into the handlebar grips and does
not make use of separate levers.
The actuating mechanism is built into the inside part of the grip that
the web of the thumb and index finger closes around.
To select a lower gear, twist the right shifter toward you to engage a
larger rear cog.
You can shift one gear at a time by moving the Grip Shift
one click,
or through multiple gears by continued twisting. By twisting the left
shifter forward or away from you a smaller chainwheel can be selected.
To select a higher gear, twist the right shifter forward or away from you
to engage a smaller rear cog. To engage a larger front chainwheel,
twist the left shifter towards you.
Single shifts can be achieved by twisting one click at a time and multiple
shifts by larger twists.
Left
Low gear front
High gear front
Right
High gear rear
Low gear rear
Front Low Gear
Rear
Low Gear
Front High Gear
Rear High Gear
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