Andrus, Sceales, Starke & Sawall, LLP
Front wheel suspension on a two-wheel drive motorcycle
A two-wheel drive motorcycle, or all wheel drive bicycle, has a spring loaded shock absorbing suspension and traction system for the front wheel. A swing arm, rather than the front steering fork, is mounted to the front wheel axle. A modified steering fork is mounted to the swing arm and a shock absorber extends between the front steering fork weldment and the swing arm. The shock absorber allows the front wheel axle to move upward relative to the front steering fork and motorcycle (or bicycle) in general to absorb upward shocks on the front wheel, and also pushes the wheel downward, thereby improving traction. The front chain drive includes two chains in series which are isolated from excessive shock forces.
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Mark H. Thomas E.
Hamilton Blais