Rim Serials: Laid into the rim channel, usually opposite the valve hole. These numbers will not contain the letter C or any dashes.
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.