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2. Bicycle gearing - Wikipedia

   en.wikipedia.org/wiki/Bicycle_gearing

   A bicycle gearbox with chain tensioner. Bicycle gearing is the aspect of a bicycle drivetrain that determines the relation between the cadence, the rate at which the rider pedals, and the rate at which the drive wheel turns. On some bicycles there is only one gear and, therefore, the gear ratio is fixed, but most modern bicycles have multiple ...

3. Gear inches - Wikipedia

   en.wikipedia.org/wiki/Gear_inches

   Gear inches is an imperial measure corresponding to the diameter in inches of the drive wheel of a penny-farthing bicycle with equivalent (direct-drive) gearing. A commonly used metric alternative is known as metres of development or rollout distance, which specifies how many metres a bicycle travels per revolution of the crank.

4. Gear - Wikipedia

   en.wikipedia.org/wiki/Gear

   Worm-and-gear sets are a simple and compact way to achieve a high torque, low speed gear ratio. For example, helical gears are normally limited to gear ratios of less than 10:1 while worm-and-gear sets vary from 10:1 to 500:1. [45] A disadvantage is the potential for considerable sliding action, leading to low efficiency. [46]

5. List of Subaru transmissions - Wikipedia

   en.wikipedia.org/wiki/List_of_Subaru_transmissions

   After its introduction in 1984, the Justy was also available with 4WD and thus a different gearbox. The gear ratios for this gearbox were altered slightly. In 1994 the normal/FWD gearbox was dropped; one could only get a 4WD gearbox by then. Gear ratios: 1st 3.071 2nd 1.695 3rd 1.137 4th .771 5th .631, Rev 3.461 Final 5.200

6. Hub gear - Wikipedia

   en.wikipedia.org/wiki/Hub_gear

   v. t. e. Sturmey-Archer S3X. 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 ...

7. Getrag F23 transmission - Wikipedia

   en.wikipedia.org/wiki/Getrag_F23_transmission

   The F23 is a five-speed manual transmission manufactured by Getrag in Italy. [citation needed] It is designed for transverse engine applications, primarily by General Motors. It can handle torque inputs of over 230 newton-metres (170 lbf⋅ft). The F23 has one roll pin, two gearsets on each of three parallel shafts – the input shaft, the ...

8. Gear train - Wikipedia

   en.wikipedia.org/wiki/Gear_train

   Gear train. Transmission of motion and force by gear wheels, compound train. [1] Illustration by Georgius Agricola (1580) showing a toothed wheel that engages a slotted cylinder to form a gear train that transmits power from a human-powered treadmill to mining pump. A gear train or gear set is a machine element of a mechanical system formed by ...

9. Differential (mechanical device) - Wikipedia

   en.wikipedia.org/wiki/Differential_(mechanical...

   Contents. Differential (mechanical device) A differential is a gear train with three drive shafts that has the property that the rotational speed of one shaft is the average of the speeds of the others. A common use of differentials is in motor vehicles, to allow the wheels at each end of a drive axle to rotate at different speeds while cornering.