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Technical entry
Torque Sensor
A torque sensor measures twisting force within an e-bike’s pedal or drivetrain system. The controller combines this signal with […]
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Bladder Molding
Bladder molding is a composite manufacturing process used to produce hollow carbon-fiber structures. Prepreg carbon is placed in a […]
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Resin Transfer Molding (RTM)
Resin Transfer Molding (RTM) is a composite manufacturing process in which liquid resin is injected into a closed mold […]
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Universal Derailleur Hanger (UDH)
The Universal Derailleur Hanger (UDH) is a standardized frame and hanger interface introduced by SRAM in 2019. It gives […]
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I-Spec
I-Spec is Shimano’s family of integrated handlebar mounts for attaching a compatible shifter or electronic switch to a brake […]
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Boost Spacing
Boost is a mountain-bike hub-spacing standard that uses 110 mm front and 148 mm rear hub widths with thru-axles. […]
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Direct Mount Chainring
A direct-mount chainring attaches to a dedicated interface on the crank without using a separate bolt-on spider and conventional […]
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Hyperglide
Hyperglide is Shimano’s cassette-tooth and shift-ramp technology for controlled indexed shifting. Its shaped teeth and strategically positioned ramps guide […]
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Hyperglide+
Hyperglide+ is Shimano’s drivetrain technology for faster, smoother shifting while the rider continues pedaling. It combines specifically shaped cassette […]
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Axle-to-Crown
Axle-to-crown is a fork-length measurement taken between the center of the front axle and the crown-race seat at the […]
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Hub Motor
A hub motor is an electric drive unit built into the front or rear wheel hub of an e-bike. […]
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Mid-Drive Motor
A mid-drive motor is an e-bike drive unit positioned near the bottom bracket that sends rider and motor power […]
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.