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Auto 3 - The hub is fitted with a 3 speed automatic gear system, which utilizes a front hub dynamo to power a CPU that automatically changes the three speed internally geared hub. A similar system was built for the nexus 4. [4] Inter 4 - Nexus Inter 4 hubs had four speeds, but
The three-speed bicycle is a bicycle that uses internal hub gears at the rear wheel hub to provide three gear ratios. Three-speed hubs have been in use since the early 1900s. Though they are heavier than comparable derailleur systems, internal-gear hub systems generally last longer and require less maintenance.
A Sturmey-Archer three speed hub, the most common kind of Sturmey-Archer gear. Sturmey-Archer was a manufacturing company originally from Nottingham, England.It primarily produced bicycle hub gears, brakes and a great many other sundry bicycle components, most prominently during its heyday as a subsidiary of the Raleigh Bicycle Company.
This page is a list of internal hub gears for bicycles. Brand Model ... 3 165.1% 80 Nm 1700g eCity / eTour 3x3 ... Nexus 4 Speed 4 184% 1st gear City Shimano
A hub gear, [1] internal-gear hub, [2] internally geared hub [3] or just gear hub [4] is a gear ratio changing system commonly used on bicycles that is implemented with planetary or epicyclic gears. The gears and lubricants are sealed within the shell of the hub gear, in contrast with derailleur gears where the gears and mechanism are exposed ...
Also of note was the Trek Lime from the 2000s. It used an internal 3-speed hub gear that was electrically shifted based on the rider's speed. Power was provided by a dynamo on the front hub. [3] Current autobike designs of the 2020s build on the principles introduced by the Trek Lime. The front wheel uses a hub dynamo to generate
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They can be used individually, as an external derailleur or an internal hub gear, or in combinations such as the SRAM Dual Drive, which uses a standard 8 or 9-speed cassette mounted on a three-speed internally geared hub, offering a similar gear range as a bicycle with a cassette and triple chainrings. Derailleur gears. Cogset; Crankset; Hub gear
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