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:
“O born in days when wits were fresh and clear,
And life ran gaily as the sparkling Thames;
Before this strange disease of modern life,
With its sick hurry, its divided aims,
Its head o’ertaxed, its palsied hearts, was rife—”
—Matthew Arnold (1822–1888)
“Even crushed against his brother in the Tube the average Englishman pretends desperately that he is alone.”
—Germaine Greer (b. 1939)