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Rim Serials:  Laid into the rim channel, usually opposite the valve hole.  These numbers will not include a «C».

Fork Serials:  Stamped into the steerer tube.

Stem Serials: Stamped into the stem, behind the faceplate.

Seatpost Serials: Laid into the post near the base.

Handlebar Serials:  Stamped near the tip on either the right or left side.