Super Boost Plus
Summary Super Boost Plus is a rear frame-and-hub interface based on 12 × 157 mm spacing. It gives hub and frame designers additional lateral space that can be…
Velopedia Entries
An evolving encyclopedia of cycling brands, technologies, components, and history.
Bosch Performance Line CX
Summary The Bosch Performance Line CX is a mid-drive e-bike motor developed specifically for performance mountain biking. Introduced in 2015, it has evolved through several hardware generations and…
Anti-Rise
Summary Anti-rise describes how forces generated by the rear brake interact with a bicycle’s rear suspension during deceleration. It is usually expressed as a percentage representing how strongly…
Seat Tube Angle
Summary Seat tube angle describes the orientation of a bicycle’s seat tube or virtual seatpost line relative to the ground. It influences where the saddle can be positioned…
Switch Infinity
Summary Switch Infinity is Yeti Cycles’ patented four-bar rear-suspension system built around a translating lower pivot. Instead of rotating around a fixed lower link, the main pivot moves…
Chainline
Summary Chainline is the lateral position of a bicycle’s chainring relative to the frame centerline and rear sprockets. Correct chainline supports reliable shifting, chain retention, component clearance, and…
Power Meter
Summary A cycling power meter measures the mechanical power a rider produces and reports it in watts. Most systems determine power from drivetrain torque and crank angular velocity.…
Friction Shifting
Summary Friction shifting uses a continuously adjustable lever to control derailleur position without fixed gear stops. The rider moves the lever until the chain reaches the desired sprocket…
Indexed Shifting
Summary Indexed shifting uses defined shifter positions to move a derailleur or internal gear mechanism between specific gears. In a mechanical derailleur system, each click releases or pulls…
Oval Chainring
Summary An oval chainring is a non-round chainring that changes the drivetrain’s effective gear ratio as the cranks rotate. Its shape and orientation are intended to place a…
Cadence Sensor
Summary A cadence sensor detects crank rotation in an e-bike pedal-assist system. It tells the controller when the rider is pedaling and may also report crank speed and…
Pedal Assist (PAS)
Summary Pedal assist, commonly abbreviated PAS, is an e-bike control system that activates the motor in response to the rider turning or loading the pedals. Depending on the…