Shimano FC-2200, FC-2203 Technical Service Instructions

Technical Service Instructions SI-1EU0B

Front chainwheel

FC-2200
FC-2203

General Safety Information

WARNING

• Be careful not to let the cuffs of your clothes get caught in the chain
while riding, otherwise you may fall off the bicycle.

• Check that the tension of the chain is correct and that the chain is
not damaged. If the tension is too weak or the chain is damaged, the
chain should be replaced. If this is not done, the chain may break
and you may fall off the bicycle.

• Check that there are no cracks in the crank arms before riding the
bicycle. If there are any cracks, the crank arm may break and you
may fall off the bicycle.

• Obtain, read and carefully service instructions when installing parts.
A loose, worn, or damaged parts may cause injury to the rider.
We strongly recommend that only genuine Shimano replacement
parts be used.

• Read these Technical Service Instructions carefully, and keep them in
a safe place for later reference.

Note

• Check that there is no looseness in any joints or connections before
riding the bicycle. (BB-FC, FC-PD)

• If you feel any looseness in the bottom bracket axle, the bottom
bracket should be replaced.

• In addition, if pedaling performance does not feel normal, check this
once more.

• Do not wash the bottom bracket with high-pressure jets of water.

• Apply grease to the bottom bracket before installing it.

• To ensure the best performance, be sure to use only the specified
type of chain. The wide type of chain cannot be used.

• If the chain keeps coming off the sprockets during use, replace the
sprockets and the chain.

• You should periodically wash the sprockets in a neutral detergent and
then lubricate them again. In addition, cleaning the chain with neutral
detergent and lubricating it can be a effective way of extending the
useful life of the sprockets and the chain.

• Parts are not guaranteed against natural wear or deterioration
resulting from normal use.

• For maximum performance we highly recommend Shimano lubricants
and maintenance products.

• For any questions regarding methods of installation, adjustment,
maintenance or operation, please contact a professional bicycle
dealer.

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For the FC-2200, the tooth number marking on the large chainring should face
outward, and the markings on the small chainrings should face inward.
Install so that the markings are in the
positions shown in the illustration.

Specifications

Installation of the bottom bracket

130 mm 130 / 74 mm

52 / 39, 50 / 39T 52 / 42 / 30T

FC-2200 FC-2203

CN-HG50 CN-HG50

BB-UN25 BB-UN25

BC 9/16"x20 T.P.I. BC 9/16"x20T.P.I.

165, 170, 175 mm 165, 170, 175 mmCrank arm length

Pedal threads

Applicable chain

Applicable bottom bracket

Chainwheel teeth

Bolt circle diameter

Model number

Front Chainwheel

Install using the special tool TL-UN74.
First install the main body, then the adapter.

Tightening torque:

50 - 70 N·m

{435 - 608 in. lbs.}

Main body

BB-UN25

Adapter

Front chainwheel

110 mm 113 mm

Double Triple

BB-UN25 BB-UN25

68 mm (1.37 X 24 T.P.I.)
70 mm (M36 X 24 T.P.I.)

43.5 mm 45 mmChain line

Thread dimensions

Type

Spindle length

Model number

Bottom Bracket

Installation of the chain rings

Smooth shifting will not be possible if the chain rings are incorrectly
installed, so be sure to install them in the correct positions.

Tooth number
markings

FC-2200

FC-2203

Tooth number
markings

For the FC-2203, the tooth number
marking on the largest chainring should
face outward, and the markings on the
intermediate and smallest chainrings
should face inward.