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  2. Bottom bracket - Wikipedia

    en.wikipedia.org/wiki/Bottom_bracket

    Aerozine ceramic external bottom bracket bearing cups for BSC/ISO standard, that is M34.798×1.058 mm (1.37″-24 TPI) threads and a 68 mm wide bottom bracket shell. The bottom bracket on a bicycle connects the crankset (chainset) to the bicycle and allows the crankset to rotate freely.

  3. Wheel hub assembly - Wikipedia

    en.wikipedia.org/wiki/Wheel_hub_assembly

    The hub assembly is located between the brake drums or discs and the drive axle. A wheel is bolted on it. Depending on the construction, the end of the hub comes equipped with the splined teeth. They mate the teeth on the axle shaft. The axle hub spins along with the wheels bolted to it and provide power to the wheels in order to rotate.

  4. 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.

  5. 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 ...

  6. Jewel bearing - Wikipedia

    en.wikipedia.org/wiki/Jewel_bearing

    A jewel bearing is a plain bearing in which a metal spindle turns in a jewel-lined pivot hole. The hole is typically shaped like a torus and is slightly larger than the shaft diameter. The jewels are typically made from the mineral corundum , usually either synthetic sapphire or synthetic ruby .

  7. List of bicycle parts - Wikipedia

    en.wikipedia.org/wiki/List_of_bicycle_parts

    Hub dynamo: a generator inside one of the hubs for powering lights or other accessories; Hub gear: a gearbox mounted inside the hub, 3-speed is common, 5, 7 are available ("Sturmey-Archer"), Enviolo makes a CVT, and Rohloff makes a 14-speed hub. Cable operated by one or two cables; Indicator: a turn signal

  8. These are the top 100+ gifts of 2024, according to Amazon - AOL

    www.aol.com/lifestyle/top-100-gifts-2024-amazon...

    Looking for gifting inspiration? Amazon is tracking the year's top 100 gifts, from cozy weighted blankets to chic mini blenders. Here are our favorites.

  9. Ball bearing - Wikipedia

    en.wikipedia.org/wiki/Ball_bearing

    In some settings only a thin coating of ceramic is used over a metal ball bearing. Fully ceramic bearings 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.