Bicycle Rims
The rim is an extrusion that is butted into itself
to form a circle. The number of spoke holes on the
rim normally matches the number of spoke holes in
the hub. Some unusual rim designs have no holes
for spokes.
Rims meant for use with rim brakes provide a
smooth braking surface, while rims meant for use
with disc brakes or hub brakes sometimes lack
this surface.
Rims can either have a single-wall or double-wall
cross section. Single-wall rims are usually less
expensive and weaker. Double-wall rims tend to
be stronger and more expensive. Double-wall rims
may have a deep profile either to reduce aerodynamic
drag or for additional strength, especially in
the case of few spokes. |
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