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2020 full suspension mountain bike with a four-bar linkage rear suspension. A rigid 2002 Trek 800 Sport mountain bike An elastomer suspension stem. Bicycle suspension is the system, or systems, used to suspend the rider and bicycle in order to insulate them from the roughness of the terrain.
The difference between the two can be seen by the depth of mounting grooves on the bottom bracket spindle. v1 spline grooves are 5 mm long, while v2 grooves are 9 mm long. Shimano 105, Ultegra 6500 and Dura Ace 7700 cranksets mate to v1 spindles, while later mountain bike designs use the deeper-grooved v2.
An ignition switch, starter switch or start switch is a Key switch in the control system of a motor vehicle that activates the main electrical systems for the vehicle.In vehicles powered by internal combustion engines, the switch provides power to the starter solenoid and the ignition system components (including the engine control unit and ...
Shaft-driven bikes have a large bevel gear where a conventional bike would have its chain ring. This meshes with another bevel gear mounted on the drive shaft. The use of bevel gears allows the axis of the drive torque from the pedals to be turned through 90 degrees.
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The point machine (in this case an electric motor) and associated mechanism used to operate this switch can be seen to the right in the picture. A point machine (also known as a point motor, switch machine or switch motor) is a device for operating railway turnouts especially at a distance.
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The bike has always offered standard rear dropout spacing, which allows a wide range of gearing options and disc brakes. Standard options currently include: 8-speed hub gear, 8-speed dérailleur, 24-speed SRAM Dual Drive hybrid gearing system, and the Rohloff Speedhub 14-speed hub gear. The more expensive models are now fitted with disc brakes.