Specifications
130 mm
A-53 / 42T, B-53 / 39T, B-52 / 39T, B50 / 39T,
54 / 42T, 55 / 42T, 56 / 44T
CN-7800
43.5 mm
B.C. 9/16" x 20T.P.I. (English thread)
165, 167.5, 170, 172.5, 175, 177.5, 180 mm
Crank arm length
Pedal threads
Applicable chain
Chain line
Chainwheel tooth combination
Bolt circle diameter
68 mm (1.37 X 24 T.P.I.)
70 mm (M36 X 24 T.P.I.)
Shell width
(Thread dimensions)
S
G
-X
5
3
-B
With the marked surface of the larger
chainring facing out, set the larger chainring
so that the chain drop prevention pin is lined
up with the crank arm position.
Chain drop prevention pin
Installation of the chainrings
Smooth shifting will not be possible if the chainrings are incorrectly
installed, so be sure to install the chainrings in the correct positions.
With the marked surface of the smaller
chainring facing away from the crank arm,
set the chainring so that the
o
mark is
lined up with the crank
arm position.
SG-X 53-B
Crank arm
S
G
-X
1
0
S
3
9
-B
B
D
Crank arm
o
mark
Outer side
Inner side
SG-X 10S 39-B
BD
Mark
Installation of the front chainwheel
Follow the procedure in the figure.
1, 2
Use the special tool TL-FC32 to install the right
adapter (counterclockwise thread) and the left
adapter (clockwise thread).
Tightening torque: 35 - 50 N·m {305 - 435 in. lbs.}
3
Insert the right crank unit.
4
Set section A of the left crank into the axle of the
right crank unit where the groove is wide.
5
Use the TL-FC16 to tighten the cap.
Tightening torque: 0.7 - 1.5 N·m {6 - 13 in. lbs.}
6
Tighten the bolt of the left crank.
Note :
Each of the bolts should be
evenly and equally tightened to
12 - 15 N·m {106 - 132 in. lbs.}.
5
2
4
(A)
1
Wide groove area
TL-FC16
TL-FC32
6
clockwise for 70 mm
[M36] bottom
brackets
t
