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:
“... but by that time a lot of sea had rolled by and Lucette was too tired to wait. Then the night was filled with the rattle of an old but still strong helicopter. Its diligent beam could spot only the dark head of Van, who, having been propelled out of the boat when it shied from its own sudden shadow, kept bobbing and bawling the drowned girl’s name in the black, foam-veined, complicated waters.”
—Vladimir Nabokov (1899–1977)
“One of the great natural phenomena is the way in which a tube of toothpaste suddenly empties itself when it hears that you are planning a trip, so that when you come to pack it is just a twisted shell of its former self, with not even a cubic millimeter left to be squeezed out.”
—Robert Benchley (1889–1945)