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Core terms and principles used to understand bicycle geometry, suspension behavior, setup, performance, and service.
Technical entry
Chainline
Chainline is the lateral position of a bicycle’s chainring relative to the frame centerline and rear sprockets. Correct chainline […]
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Hub Spacing
Hub spacing is the width of a bicycle hub at the surfaces that contact the frame or fork dropouts. […]
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Wheel Dish
Wheel dish describes the lateral position of a bicycle rim relative to the hub’s installation centerline. A correctly dished […]
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Wheelbase
Wheelbase is the horizontal distance between a bicycle’s front and rear wheel axles, normally measured with the wheels pointing […]
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Fork Offset
Fork offset is the perpendicular distance between a bicycle’s steering axis and the center of its front axle. It […]
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Brake Fade
Brake fade is a heat-induced reduction in braking performance. It occurs when brake pads, rotors, rims, hydraulic fluid, or […]
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Brake Modulation
Brake modulation is the rider’s ability to make small, predictable changes in braking force after the pads contact the […]
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High Pivot Suspension
High-pivot suspension describes a rear-suspension design whose fixed main pivot or moving instant center sits substantially higher than on […]
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Axle Path
Axle path is the trajectory followed by a bicycle’s rear axle as the rear suspension moves through its travel. […]
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Super Boost Plus
Super Boost Plus is a rear frame-and-hub interface based on 12 × 157 mm spacing. It gives hub and […]
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Anti-Rise
Anti-rise describes how forces generated by the rear brake interact with a bicycle’s rear suspension during deceleration. It is […]
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Seat Tube Angle
Seat tube angle describes the orientation of a bicycle’s seat tube or virtual seatpost line relative to the ground. […]
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.