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Bicycle drivetrain systems are used to transmit power on bicycles, tricycles, quadracycles, unicycles, or other human-powered vehicles from the riders to the drive wheels. Most also include some type of a mechanism to convert speed and torque via gear ratios .
A person pedalling with 100 W power can achieve 5.5 m/s on a roadster, 7.5 m/s on a racing bicycle, 10 m/s with a faired HPV and 14 m/s with an ultimate HPV. [9] In competitive cycling a sustainable high speed is augmented by the use of light materials, low-resistance tires, aerodynamic design, and the aerodynamic effects of the peloton. The ...
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
2007 10-speed Mirage and Xenon component groups and new Ultra-Torque components are introduced. Record hubs are now black, 20 g lighter and don't have grease ports any more 2008 11-speed Record, Super Record, and Chorus groups are introduced 2009 Re-introduction of Athena as an 11-speed component group below Chorus in product line
Shimano STI Dual Control shifter and brake lever: 1. Main lever 2. Release lever A. Pulling the main lever towards the rider applies the brake B. Pushing the main lever towards the center of the bike downshifts one, two or three gears depending on how far the lever is pushed (right hand shifter) or changes from a small chainring to a larger chainring (left hand shifter)
The width of early Shimano 6- and 7-speed cassettes was 36 mm, and early 8-speed 40 mm wide. Shimano then changed again and standardised 8-11 speed cassettes on 41.5 mm and second generation 7-speed to 38 mm. The widening of the sprocket carrier on the cassette hubs to 41.5 mm resulted in a decrease in the distance between the hub flanges.
Single-speed mountain bike. A single-speed bicycle is a type of bicycle with a single gear ratio and a freewheel mechanism. These bicycles are without derailleur gears, hub gearing or other methods for varying the gear ratio of the bicycle. Adult single-speed bicycles typically have a gear ratio of between 55 and 75 gear inches, depending on ...
Seven years later in 1960, Huffman was the third largest bike manufacturer in the United States. [3] Popular models produced during the heyday of the Huffy Corporation included the RadioBike, which had an electron-tube radio in the tank; [7] the Scout, a 10-speed road bicycle; the Dragster, a so-called "wheelie bike"; and the Sigma, a BMX bike.