ISCG
Summary ISCG is the original International Standard Chain Guide interface introduced in 2003. It defines the position of three threaded frame tabs used to mount chain guides and…
Velopedia Entries
An evolving encyclopedia of cycling brands, technologies, components, and history.
ISCG-05
Summary ISCG-05 is a standardized frame interface for mounting chain guides, bash guards, and related drivetrain-protection devices near a bicycle’s bottom bracket. Introduced in 2005, it uses three…
Chain Guide
Summary A chain guide is a drivetrain component that limits chain movement around the chainring to reduce the chance of derailment. Most commonly used on mountain bikes, chain…
Chain Damper
Summary Chain damper is an informal term for components that reduce uncontrolled chain movement or isolate the rider and suspension from drivetrain feedback. It does not describe one…
Leverage Curve
Summary A leverage curve shows how the mechanical ratio between a bicycle’s rear-wheel movement and shock movement changes through the suspension travel. It influences the wheel’s effective spring…
DW6 Suspension
Summary DW6 is a six-bar rear-suspension architecture developed by Dave Weagle. Introduced on the Robot Bike Co. R160 in 2016, it expands on the principles associated with four-bar…
Compression Damping
Summary Compression damping controls the hydraulic resistance generated as a bicycle’s suspension compresses. It affects how quickly the fork or shock moves through its travel during impacts, braking,…
Rebound Damping
Summary Rebound damping controls how quickly a bicycle’s suspension extends after being compressed. It regulates the release of energy stored in the air or coil spring, helping the…
Heat-Affected Zone
Summary The heat-affected zone (HAZ) is the region of base metal next to a welded or otherwise thermally joined area whose microstructure or mechanical properties have changed because…
Fillet Brazing
Summary Fillet brazing is a bicycle framebuilding technique in which mitered metal tubes are joined directly with brazing filler built into an external fillet rather than with structural…
TIG Welding
Summary TIG welding is a fusion-welding process that creates an electric arc between a non-consumable tungsten electrode and the workpiece. In bicycle manufacturing, TIG—formally Gas Tungsten Arc Welding…
Brazing
Summary Brazing is a metal-joining process in which a filler metal is melted and used to join components without melting the base metals themselves. In bicycle construction, brazing…