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:
“We may not pay Satan reverence, for that would be indiscreet, but we can at least respect his talents. A person who has for untold centuries maintained the imposing position of spiritual head of four-fifths of the human race, and political head of the whole of it, must be granted the possession of executive abilities of the loftiest order.”
—Mark Twain [Samuel Langhorne Clemens] (1835–1910)
“Even crushed against his brother in the Tube the average Englishman pretends desperately that he is alone.”
—Germaine Greer (b. 1939)