Hub gears or internal-gear hubs are sophisticated gear systems commonly used on bicycles.
Hub gear systems generally have a long and largely maintenance-free life though some are not suitable for high-stress use in competitions or hilly, off-road conditions.
Better commuter or urban cycles such as Dutch bicycles commonly have 7-speed gear-hubs with 8-speed systems becoming increasingly available. Older or lesser cost utility bicycles often use 3-speed gear-hubs, e.g. the public bicycle rental programmes in Paris, Montreal, Lyon, London, and Washington, DC. Many folding bicycles use 3-speed gear-hubs. Hubs with up to 14 gears are available.
Gear-hubs use internal planetary or epicyclic gearing. Unlike derailleur gears, where the gears and mechanism are exposed to the elements, hub gears and lubricants are sealed within the hub-shell of the bicycle's rear wheel.
Gear changing for the hub was traditionally accomplished by a lever connected to the hub via a cable. Twist-grip style shifters are more popular today.
Our Bicycle Hub Bearings are thin-section, radial, sealed ball bearings. The main items have 6802-2RS / SS6802-2RS, 6803-2RS / SS6803-2RS, 6804-2RS / SS6804-2RS, 6805-2RS / SS6805-2RS, 6902-2RS / SS6902-2RS, 6903-2RS / SS6903-2RS, 6904-2RS / SS6904-2RS, 6905-2RS / SS6905-2RS (SS: Stainless Steel Ball Bearing, SUS 440C material).
These Hub Bearings could be used in CHRIS KING, HOPE, FSA, NECO, FIRST, DT SWISS brand hubs.
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