Most bicycles, tricycles and motorcycles have a tubular frame. The front fork (which holds the front wheel) pivots within the head tube . On a motorcycle, the "head tube" is normally called the steering head. On a bicycle the head badge is invariably mounted on the head tube.
Read more about Head Tube: Bearings, Castor Angle, Head Tube Diameters
Famous quotes containing the words head and/or tube:
“Piece by piece I seem
to re-enter the world: I first began
a small, fixed dot, still see
that old myself, a dark-blue thumbtack
pushed into the scene,
a hard little head protruding
from the pointillist’s buzz and bloom.”
—Adrienne Rich (b. 1929)
“Even crushed against his brother in the Tube the average Englishman pretends desperately that he is alone.”
—Germaine Greer (b. 1939)