Braze-on

A braze-on is the name for any number of parts of a bicycle that have been permanently attached to the frame.^[1] The term "braze-on" comes from when these parts would have been brazed on to steel frame bicycles. Braze-ons continue to be so-called even though they may be welded, glued, riveted, or moulded into the frame material, depending on the material itself and the connection method used elsewhere on the frame.

Braze-on cable stop on bottom of top tube that happens to be welded on.

Uses

Braze-ons include:

• Rack and mudguard/fender mounts at the dropouts, seatstays, and fork blades.
• Water bottle cage mounts.
• Cable carriers, guides, and stops.
• Pump pegs.
• Shifter bosses.
• Cantilever brake bosses.
• Chain hanger, inside the drive-side seatstay.
• Front derailleur hanger.^[2]
• Hub brake reaction arm mount. Called a Pacman braze-on if formed with a slot instead of a hole.^[3]