Schwinn PACIFICCYCLE ROAD BICYCLE Manual De Uso Y Cuidado página 57

Left Crankarm
Square-Taper
Bottom Bracket
Right Crankarm
Crank Set
Threaded Cup Spindle
Cartridge Bottom Bracket Assembly
CRANK SET
In general, the crank set refers to the crank arms and the bottom
bracket assembly. Modern crank sets have been highly refined over
the years, resulting in great increases in shifting performance and
Chainring
improved weight savings. Depending on the particular model of bike
that you have, you may find that your cranks are constructed of either
Crankarm Bolt
aluminum alloy or carbon fiber. You may also find that your crank is
equipped with either two or three chainrings, depending on the bike
model. A double chainring crank will typically be found on the more
racing specific models, while the triple chainring cranks will be
predominant on models with a range of intended uses.
There are also two main types of crank arm and bottom bracket
Dust Cap
spindle interface systems. Your bike may be fitted with either a
splined interface, or a square tapered interface. The splined interface
system is a more recent introduction and provides for a more secure
Bottom Bracket fitting between the crank arm and spindle while increasing the overall
stiffness and efficiency of the crank set. The square tapered interface
has been the standard system for many years and is a simple and
reliable set-up.
Threaded
Cartridge Body
Never ride your bike if the cranks are loose. This
may be dangerous and will damage the crank arms
beyond repair.
©2014 PACIFICCYCLE INC.
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