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Portage strap: a strap (usually made of leather) attached to the inside of the bike frame, designed to make carrying the bike over one's shoulder easier; Pulley wheel: see Jockey wheel; Power meter: a device on a bicycle that measures the power output of the rider; Quick release: a skewer with a lever on one end that loosens when the lever is ...
The mechanism has a rocker arm [5] [6] on each side of the bike that replaces the round sprockets (which are usually only on the right side) on chain driven bikes. In contrast to traditional derailleur chain drives, the drive does not slip when changing gears, [7] and the gearing can be changed even when the bicycle is almost stationary.
A chain drive and rear derailleur gear change, the most popular system in use today A shaft-drive with crankset and rear gear hub. 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.
Cable pull types. Bottom pull: Commonly used on road and touring bikes, this type of derailleur is actuated by a cable pulling downwards. The cable is often routed across the top or along the bottom of the bottom bracket shell on a cable guide, which redirects the cable up the lower edge of the frame's down tube. Full-suspension mountain bikes ...
Even newer designs have the bottom bracket spindle, usually hollow and larger diameter than is possible for bottom brackets with bearings held inside the bottom bracket shell of a bike frame, for reduced weight and increased stiffness, permanently attached to the right crank (Shimano and others) or the left crank (Race Face).
Bottom bracket bearings fit inside the bottom bracket shell, which connects the seat tube, down tube and chain stays as part of the bicycle frame. The term "bracket" refers to the tube fittings that are used to hold frame tubes together in lugged steel frames [ 1 ] which also form the shell that contains the spindle and bearings; the term is ...
Bicycle chains Roller chain and sprocket. A bicycle chain is a roller chain that transfers power from the pedals to the drive-wheel of a bicycle, thus propelling it.Most bicycle chains are made from plain carbon or alloy steel, but some are nickel-plated to prevent rust, or simply for aesthetics.
A steel hardtail mountain bike frame produced by Rocky Mountain Bicycles. A bicycle frame is the main component of a bicycle, onto which wheels and other components are fitted. The modern and most common frame design for an upright bicycle is based on the safety bicycle, and consists of two triangles: a main triangle and a paired rear triangle