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2. Rolling resistance - Wikipedia

   en.wikipedia.org/wiki/Rolling_resistance

   Figure 1 Hard wheel rolling on and deforming a soft surface, resulting in the reaction force R from the surface having a component that opposes the motion. (W is some vertical load on the axle, F is some towing force applied to the axle, r is the wheel radius, and both friction with the ground and friction at the axle are assumed to be negligible and so are not shown.

3. False brinelling - Wikipedia

   en.wikipedia.org/wiki/False_brinelling

   False brinelling of a bearing. False brinelling is a bearing damage caused by fretting, with or without corrosion, [1] that causes imprints that look similar to brinelling, but are caused by a different mechanism. False brinelling may occur in bearings which act under small oscillations [2] or vibrations. [3]

4. Motorcycle components - Wikipedia

   en.wikipedia.org/wiki/Motorcycle_components

   A motorcycle fork is the portion of a motorcycle that holds the front wheel and allows one to steer. For handling, the front fork is the most critical part of a motorcycle. The combination of rake and trail determines how stable the motorcycle is. The 'fork' on a motorcycle consists of multiple components.

5. Race (bearing) - Wikipedia

   en.wikipedia.org/wiki/Race_(bearing)

   In the case of ball bearings, the bearing has inner and outer races and a set of balls. Each race is a ring with a groove where the balls rest. The groove is usually shaped so the ball is a slightly loose fit in the groove. Thus, in principle, the ball contacts each race at a single point.

6. Bicycle and motorcycle geometry - Wikipedia

   en.wikipedia.org/wiki/Bicycle_and_motorcycle...

   where is wheel radius, is the bicycle head angle measured from the horizontal, is the motorcycle rake angle measured from the vertical, and is the fork offset. Trail can be increased by increasing the wheel size, decreasing or slackening the head angle, or decreasing the fork offset .

7. Hub-center steering - Wikipedia

   en.wikipedia.org/wiki/Hub-center_steering

   The Vyrus 985 C3, an exclusive Italian motorcycle with hub-center steering, of which 24 were sold between 2004-2008 Hub-center steering in Bimota Tesi 1/D. Hub-center steering (HCS) is one of several different types of front-end suspension/steering mechanisms used in motorcycles and cargo bicycles. Hub-center steering is characterized by the ...