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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.
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
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 ...
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
Internal hub gearing is most common in European utility bicycles, usually ranging from three-speeds to eight speeds, however hub gears with fourteen (Rohloff-drive) or eighteen (Pinion-drive) speeds are also available. Retro-Direct bicycles have two sprockets on the rear wheel. By back-pedalling, the secondary, usually lower, gear is engaged.
In 2011, Chappelli Cycles released its first 3-speed internal hub bicycle and an 8-speed model. The following year, 2012, Chappelli Cycles won an Australian Design Award for the Chappelli NuVinci bicycle, and launched Australia's first glow-in-the-dark bicycle.
It is made from chromoly steel and comes in an eight-speed internal hub, a 24- or a 27-speed version. [14] Traveler – On October 23, 2013 TerraTrike released their new folding model named the Traveler at their annual Dealer Day expo. [13] Tour II – The Tour II is the combination of the Tour and the popular Cruiser models. It is made from ...
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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