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Rohloff hubs generally require a break-in period to function optimally. The manufacturer suggests this may require 500–1,000 miles (805–1,610 km) of active riding. For some riders the break-in period may be longer. Until the hub is broken in the rider may experience some noise or vibrations when the reduction-gear is in operation (gears 1–7).
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 ...
Nexus 4 Speed 4 184% 1st gear City Shimano Nexus Inter-3: 3 187% 2nd gear 1220 g City SRAM Spectro E12 (Elan) 1995 1999 12 339% 3500-4000 g City SRAM i-Motion 9: 2005 2012 9 340% 2000g (w/o brake)-2400g (with coaster brake) City SRAM G8: 2012 2015 8 260% 2088-2180 g [16] [17] City SRAM G9 2014 2015 9 292% 2088 g [17] City, Sport SRAM (Sachs)
Having now acquired rights to two similar three-speed hubs, Bowden decided that it was a more practical and profitable proposition to manufacture Reilly's hub rather than Sturmey's. [ 6 ] Henry Sturmey was bitterly disappointed by Frank Bowden's action and threatened to take his hub elsewhere.
At the time, the gear hub with the greatest number of speeds was the unreliable 3700 gram 12 speed Sachs Elan (discontinued by 2000), made by the hub-gear manufacturer Sachs (later acquired by SRAM). A year later Rohloff presented a workable prototype at the 1997 IFMA and won a crate of champagne from the employees at Sachs, who had bet against ...
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.
i-Motion 9 - This hub gear has nine speeds in percentage increments of 14,17,17...17,14, offering an overall range of 340%. The coaster-brake version weighs 2400 grams, while the non-brake integrated versions weigh just under 2000 grams.
In the early 2000s the 8-speed Nexus hub gear was introduced, having two stepped planetary series mounted downstream of each other. The hub was operated with a twist shifter. By November 2006, The Nexus range came in several ranges (Inter 3, Inter 7 and Inter 8) providing 3, 7 and 8 speed models respectively.