All Mountain Bike Parts Descriptions
Sets - The bearings for your steering.
Head sets are pressed into the top and bottom
of the frames headtube, providing effortless effort....um,
to steer the bike. They come in 1" (old style)
1-1/8" (standard) and 1-1/2" (which may
or may not be around very long) All headsets sizes
can only be used on its corresponding frame. They
come in loose bearing, needle bearing, or cartridge,
and are available threaded for the older stuff or
A-head style for the newer rigs.
Bike Parts Diagram