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Three-speed bicycle. 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.
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 ...
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
The 3.6 kg (8 lb) NuVinci rear hub. Comparatively, the newer NuVinci hubs from around 2010 [citation needed] weighs 2.4 kg (5.4 lb) The NuVinci CVT may be applicable to many different products using a mechanical power transmission. The only application currently commercialized is the internally geared bicycle hub.
One standard option for the Brompton folding bicycle is to use a 3-speed hub gear (roughly a 30% difference between gear ratios) in combination with a 2-speed derailleur gear (roughly a 15% difference) to give 6 distinct gear ratios; this is an example of half-step gearing. Some Brompton suppliers offer a 2-speed chainring 'Mountain Drive' as ...
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 ...
Inter 5E - A 5-speed hub targeted at the e-bike market, launched in 2019. Unrelated to the previous Inter 5 model. Unrelated to the previous Inter 5 model. Available with a conventional twist-grip for mechanical shifting (SG-C70 00 -5 X series), or with an automatic shifter (SG-C70 50 -5 X series) [ 10 ] integrated with the Shimano STEPS e-bike ...
Murray was an American company whose assets are now owned by Briggs & Stratton and Pon Holdings. The corporate brand is a descendant of the Murray Ohio Manufacturing Company, which manufactured bicycles and lawn and garden equipment. The company went bankrupt in 2005 selling most of its assets to Briggs & Stratton and Pacific Cycle.