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Frameset (Bicycle)

The Frameset of a bicycle consists of the Frame and the Fork. Together, these two components create the "skeleton" of the bike that holds all of the components together. In most cases, the frameset is the key defining and identifying feature of the bike.


The Frame is the primary bulk of the bike, and can generally be split into two sections: the "main triangle" and the "rear triangle".

Main Triangle

The main triangle is composed of three tubes that give fundamental structure to the size of the bike, and they are the Top Tube (runs parallel to the ground at the top of the triangle), the Seat Tube (runs perpendicular to the ground, holds the seat post), and the Down Tube (runs diagonally from the front of the bike to the Bottom Bracket, connecting the Top Tube and Seat Tube). Technically, there is a fourth tube in this triangle as well, where the Top Tube and Down Tube meet: the Head Tube. The Head Tube is where the steerer column lives, and is also where the Fork attaches to the frame.

The main triangle is what determines the majority of the sizing of the bike.

Rear Trianlge




/frameset-bicycle Stream

April 22, 2024

/stream /repair /bicycle /frameset-bicycle /gitane-1974

After seeing how great of an outcome some elbow grease can yield on the cranks and stem, I decided that the rough paint job I accomplished last fall could have been a lot better if I prepped the frame more thoroughly. I bought some proper gear (namely, a wire-brush drill attachment kit) and started properly stripping the frame of paint down to the steel.

On some dead grass, a bare bike frame sits next to a cordless drill with a wire brush attachment. The rear triangle of the frame still has green paint on it, but the main triangle is almost completely stripped down to the steel.

And hour or so (and several batteries worth of cordless drill charge) later, and the frame and fork were brought down to a much smoother surface with the majority of the paint removed. The corners, especially near the bottom bracket, were difficult to remove all the paint, but I'll do a more detailed job once some tools come in that will let me remove the bottom bracket from the frame, and will also give the frame a good sanding.

A collection of bike parts lean against a white wall on a concrete floor: a handlebar/stem combo, some cranks, a fork, a frame, and two wheels are visible, all either bare or polished metal. Towards the edges of the frame you can see some non-bike related tools and materials, like a hand saw, some oil and a paint brush, and some boards of wood.

The bulk of the metal parts of the frame are now polished, or stripped and ready for painting.