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2. Hub gear - Wikipedia

   en.wikipedia.org/wiki/Hub_gear

   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 ...

3. Comparison of hub gears - Wikipedia

   en.wikipedia.org/wiki/Comparison_of_hub_gears

   e-bike Shimano 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

4. Yankee Bicycle Company - Wikipedia

   en.wikipedia.org/wiki/Yankee_Bicycle_Company

   The Yankee Bicycle Company built bicycles in West Chicago, Illinois in 1991 and 1992. The bicycles were designed by Royce Husted incorporating his patented Rim Band Brake scheme as well as a Radial Gear concept for shifting through fifteen gears. [1] The Yankee Bicycle has neither rear or front derailleurs, internal hub, or chainring.

5. Roll Bicycle Co. closing its remaining two stores, offers sales

   www.aol.com/roll-bicycle-co-closing-remaining...

   The yellow sign advertises its 60% off bikes liquidation sale on Tuesday. Roll on Sunday closed its store in Bexley, located at 2468 E Main St., and consolidated its stock in its Upper Arlington ...

6. NuVinci continuously variable transmission - Wikipedia

   en.wikipedia.org/wiki/NuVinci_Continuously...

   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.

7. Sturmey-Archer - Wikipedia

   en.wikipedia.org/wiki/Sturmey-Archer

   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 ...