User Guide

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manufacturing, it adds cost. An oven large
enough to handle bike frames also adds
cost. 6061 aluminum requires heat treat-
ment. 7005 is usually normalized.
Series nomenclature explained-
Silver Series- Proprietary Fisher aluminum
tubing, using 7005 aluminum. These frames
use special tubing diameters, wall thickness-
es, and shapes, but are not butted. In some
cases, Silver series frames are imported,
then painted and assembled in Wisconsin.
Gold Series- Like the Silver series frames,
Gold series is Fisher designed aluminum
tubing. However, Gold series frames are
built with 6061 T6 aluminum. T6 indicates
the hardness of the aluminum, developed
through a full heat treatment and ageing
process. Gold series frames are all built
and painted in Wisconsin. Due to the
mechanical properties of 6061 T6 aluminum,
Gold frames can be made lighter than Silver
frames with the same strength.
Platinum Series- Platinum frames are also
Fisher designed tubes of a combination of
ZR9000 and 6061 T6. In addition, Platinum
frames have butted tubing, which reduces
their weight and further enhances their
ride. The exact placement of these materials
is determined by where each material will do
the most good in achieving a light, strong,
affordable, and long-lived bike. They are
built and painted in Wisconsin.