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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
Bikes exist that blur the distinction by combining attributes of both, however. One example of this is a Monstercross bike, often using a standard mountain bike frame intended for use with 26″ wheels with 700c [citation needed] wheels and 700 × 38c-45c tires, disc or cantilever brakes, MTB or cross gearing, and the drop bars of a cyclocross ...
Non-steel spokes are normally reserved for racing bikes and other specialist applications where weight, aerodynamics and performance are valued over durability and cost. Rims were traditionally made of steel , but currently aluminum is by far the most common and best choice due to its light weight, high durability and stiffness.
Ducati produced several variations of the 748, starting with the basic 748 Biposto (meaning "two seat") in 1994 and then the 1995–96 748SP and 1996–99 748SPS followed as more powerful options. The different variations of the engine (weighing close to 54 kilograms (119 lb) each, produced at least 71 kilowatts (95 hp).
Tensioned spokes are usually attached to the rim or sometimes the hub with a spoke nipple. The other end is commonly peened into a disk or uncommonly bent into a "Z" to keep it from pulling through its hole in the hub. The bent version has the advantage of replacing a broken spoke in a rear bicycle wheel without having to remove the rear gears.
A working prototype of a centreless wheel, using ball bearings, was shown at India Bike Week 2014 in Goa. Attached to a customized Royal Enfield motorcycle, the prototype rear wheel was designed by a team by the name of Freedom Sprints, which included Abhishek Sharma, Ankur Tiwari, Sarvesh Khemka, Yashodeep Yadav, and Mohammed Ansar. [14]
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On a bicycle with more than one gear change mechanism (e.g. front and rear derailleur), these three numbers can be quite different, depending on the relative gearing steps of the various mechanisms. The number of gears for such a derailleur equipped bike is often stated simplistically, particularly in advertising, and this may be misleading.