Bicycle onstruction and parts
The great majority of today s bicycles have a frame with upright seating which looks
much like the first chain-driven bike.
[8] Such upright bicycles almost always feature
the diamond frame, a truss consisting of two triangles:...
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Bicycle onstruction and parts
The great majority of today s bicycles have a frame with upright seating which looks
much like the first chain-driven bike.
[8] Such upright bicycles almost always feature
the diamond frame, a truss consisting of two triangles: the front triangle and the rear
triangle.
The front triangle consists of the head tube, top tube, down tube and seat
tube.
The head tube contains the headset, the set of bearings that allows the fork to
turn smoothly for steering and balance.
The top tube connects the head tube to the seat
tube at the top, and the down tube connects the head tube to the bottom bracket.
The
rear triangle consists of the seat tube and paired chain stays and seat stays.
A Triumph with a step-through frame.
Historically, women s bicycle frames had a top tube that connected in the middle of
the seat tube instead of the top, resulting in a lower standover height at the expense of
compromised structural integrity, since this places a strong bending l
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