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One standard option for the Brompton folding bicycle is to use a 3-speed hub gear (roughly a 30% difference between gear ratios) in combination with a 2-speed derailleur gear (roughly a 15% difference) to give 6 distinct gear ratios; this is an example of half-step gearing. Some Brompton suppliers offer a 2-speed chainring 'Mountain Drive' as ...
Typical gear ratios on bicycles range from very low or light gearing around 20 gear inches (1.6 metres per revolution), via medium gearing around 70 gear inches (5.6 m), to very high or heavy gearing around 125 gear inches (10 m). As in a car, low gearing is for going up hills and high gearing is for going fast.
Micro drive is a type of bicycle drivetrain, mostly BMX and MTB, that uses smaller than standard-sized sprockets. [1] The smallest rear sprocket that fits on a freehub body is a 10 or 11-tooth, but with the use of a cassette hub, sometimes called a micro drive rear hub, sprockets as small as 8 teeth may be used.
Several technologies have been developed to alter gear ratios. 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 ...
5th gear 1550-2040 g City Shimano Nexus Inter-7: 1995 7 244% 1465-1860 g City Shimano Nexus Inter-5E 2019 5 263% 60 Nm 1st gear 1650 g 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)-
Luggage carrier: any accessory equipment designed to carry tools, gear or cargo; Master link: a bicycle chain accessory that allows convenient removal and reconnection of an installed bicycle chain without the need for a chain tool; Nipple: a specialized nut that most commonly attaches a spoke to a wheel rim. In some systems, it provides ...
The gear ratio is generally around 44:16, 36:13, 33:12, and 30:11, although using smaller gear ratios such as 25:9, also known as 'micro gearing', has become popular. There is also the so-called hybrid BMX/jump bike, which is a scaled-up BMX with 24-inch wheels. Strong alloy rims and a lightweight frame.
A component used by the rider to control the gearing mechanisms and select the desired gear ratio. It is usually connected to the derailleur by a mechanical actuation cable. Electronic shifting systems also exist. Singles Australian English for tubular tyres. [12] Singletrack A mountain bike trail designed for a single line of riders. Sit-on ...