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2. Zipp - Wikipedia

   en.wikipedia.org/wiki/Zipp

   Zipp has introduced the "customized" ZEDTECH wheel line in 2007. Users can choose from an array of colors for decals, spoke nipples, and hub end caps. All ZEDTECH wheels now include aerodynamic dimpled hubs with ceramic bearings. Also in 2007, a new 808 track wheel was introduced with 20/24 spoke pattern and the 343 wheel set (303F + 404R).

3. Bicycle wheel - Wikipedia

   en.wikipedia.org/wiki/Bicycle_wheel

   A hub is the center part of a bicycle wheel. It consists of an axle, bearings and a hub shell. The hub shell typically has two machined metal flanges to which spokes can be attached. Hub shells can be one-piece with press-in cartridge or free bearings or, in the case of older designs, the flanges may be affixed to a separate hub shell.

4. Ball bearing - Wikipedia

   en.wikipedia.org/wiki/Ball_bearing

   These bearings make use of both ceramic balls and race. These bearings are impervious to corrosion and rarely require lubrication if at all. Due to the stiffness and hardness of the balls and race these bearings are noisy at high speeds. The stiffness of the ceramic makes these bearings brittle and liable to crack under load or impact.

5. Bearing (mechanical) - Wikipedia

   en.wikipedia.org/wiki/Bearing_(mechanical)

   A ball bearing. A bearing is a machine element that constrains relative motion to only the desired motion and reduces friction between moving parts.The design of the bearing may, for example, provide for free linear movement of the moving part or for free rotation around a fixed axis; or, it may prevent a motion by controlling the vectors of normal forces that bear on the moving parts.

6. Spiral groove bearing - Wikipedia

   en.wikipedia.org/wiki/Spiral_groove_bearing

   Spiral groove bearings were used most successfully in inertial gyroscopes for planes and ships. [9] In this application, the spiral groove bearings were made of boron carbide ceramic and the grooves were manufactured by ION beam. The bearings were very successful, with MTBF values over 100,000 hours and stop-start capability of 1,000,000 times ...

7. Sturmey-Archer - Wikipedia

   en.wikipedia.org/wiki/Sturmey-Archer

   All Sturmey-Archer gear hubs use epicyclic (planetary) geartrains of varying complexity. The AW is the simplest, using one set of planetary gears with four planets. The AM uses three compound planets with differently sized cogs machined from a common shaft to engage the gear ring and sun gear separately, while the close-ratio three-speeds, and hubs with four or more speeds, use multiple ...