14
STI OPERATION
Front Gear Operation
Lever (A) -
operated by your left hand thumb pressing away from your body (shifting from a small
chainwheel to a larger chainwheel)
When it is pressed once, there is a shift of one gear
from a smaller chainwheel to a larger chainwheel.
Example: from mid-range to largest chainwheel
Lever A
Lever (B)
- operated by pulling with your left hand forefinger or pushing with your thumb
depending on model of shifter.
(shifting from a large chainwheel to a smaller chainwheel)
If your front gears do not operate smoothly, it may be that your front gear cable and front changer
need adjustment. You can adjust your front gear cable by using the outer adjustment bolt on the
left hand lever. This will adjust your front changer so that it has minimum clearance between the
chain and the inside left hand side of the chain guide.
When it is pulled once, there
is a shift of one gear from a
large chainwheel to a smaller
chainwheel.
Example: from largest
chainwheel to mid-range
Cable tension adjustment
1
. Set the chain to the
largest rear sprocket
, and, at the front, use the Rapidfire to
shift from the
largest chainwheel to the intermediate chainwheel.
Shift
Largest chainwheel
Largest sprocket
Largest sprocket Intermediate chainwheel
2
. Adjust, by using the outer adjustment bolt, so that there is the
minimum clearance, but so that the chain and the plate (inside the
chain guide) do not contact.
Minimum clearance
between chain and
inside left of change
r
A B
Front gear changer. Left hand lever
Outer adjustment bolt
Front gear changer. Left hand lever
Lever B
Lever A
You can shift the triple front chainwheels with the same precise STI action, 1 or 2 chainwheels at a
time, using levers (A) and (B) on the left hand lever
Left Hand Lever.
