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Individual parts, interfaces, and standards across drivetrains, brakes, wheels, suspension, and cockpit hardware.
Technical entry
Power Meter
A cycling power meter measures the mechanical power a rider produces and reports it in watts. Most systems determine […]
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Chain Guide
A chain guide is a drivetrain component that limits chain movement around the chainring to reduce the chance of […]
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Narrow-Wide Chainring
A narrow-wide chainring uses alternating tooth widths that correspond to the alternating inner and outer links of a bicycle […]
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Chainring Offset
Chainring offset is the lateral distance between a chainring’s mounting surface and the center plane of its teeth. It […]
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Clutch Derailleur
A clutch derailleur is a rear derailleur with a chain-stabilizing mechanism that resists unwanted cage rotation. By controlling movement […]
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Derailleur Hanger
A derailleur hanger is the interface that positions a conventional rear derailleur relative to the bicycle frame and cassette. […]
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Derailleur
A derailleur is a bicycle drivetrain component that moves the chain between sprockets or chainrings to select different gear […]
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Bafang Mid-Drive
A Bafang mid-drive is an electric-bicycle drive unit that applies motor power through the chainring and bicycle drivetrain rather […]
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Shimano Di2
Shimano Di2 is an electronic shifting platform that uses switches, digital communication, and motor-driven derailleurs instead of conventional shift […]
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Mechanical Disc Brake
A mechanical disc brake is a bicycle braking system in which a hand lever pulls a steel inner cable, […]
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Hydraulic Disc Brake
A hydraulic disc brake uses a low-compressibility fluid to transmit pressure from a handlebar-mounted master cylinder to pistons in […]
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Idler Pulley
An idler pulley is a passive drivetrain component that redirects a bicycle chain without changing the selected gear ratio. […]
Read entryTopics intentionally overlap. A drivetrain component can also be a technology; an e-bike system can include components, software, and manufacturing concepts. Cross-listing keeps related reference material discoverable from more than one path.
Technical entries are one part of bicycle knowledge for the life of the bike. Discover bicycles in the Archive, use the Encyclopedia to understand them, then carry useful context into Bike Reports or My Garage.