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The wheel
hub needs to be as friction free as possible, consistent with the hub axle
defining the plane of rotation of the wheel. The diagram and photograph
below show the cup/cone bearing hub construction for an all alloy front hub for
a road bike, and a hub made from metal alloy and a carbon fiber composite
materials. Sealed bearings may be used to prevent dirt entry, reduce wear and
the useful life of the hub. The junction between the composite hub body and
the alloy spoke flanges is a potential weak point of the two material design. |
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