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Core terms and principles used to understand bicycle geometry, suspension behavior, setup, performance, and service.
Technical entry
Rebound Damping
Rebound damping controls how quickly a bicycle’s suspension extends after being compressed. It regulates the release of energy stored […]
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Compression Damping
Compression damping controls the hydraulic resistance generated as a bicycle’s suspension compresses. It affects how quickly the fork or […]
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Leverage Curve
A leverage curve shows how the mechanical ratio between a bicycle’s rear-wheel movement and shock movement changes through the […]
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ISCG-05
ISCG-05 is a standardized frame interface for mounting chain guides, bash guards, and related drivetrain-protection devices near a bicycle’s […]
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ISCG
ISCG is the original International Standard Chain Guide interface introduced in 2003. It defines the position of three threaded […]
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Pedal Assist (PAS)
Pedal assist, commonly abbreviated PAS, is an e-bike control system that activates the motor in response to the rider […]
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Layup Schedule
A layup schedule is the manufacturing plan that defines the material, shape, orientation, position, and stacking order of every […]
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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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Head Tube Angle
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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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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Effective Top Tube
Effective top tube (ETT) is the horizontal distance between a specified point on the head tube and the seat-tube […]
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MTB Geometry
MTB geometry is the collection of frame, fork, and wheel dimensions that determines how a mountain bike fits, steers, […]
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.