Heat-Affected Zone
Summary The heat-affected zone (HAZ) is the region of base metal next to a welded or otherwise thermally joined area […]
H
Hub Spacing
Summary Hub spacing is the width of a bicycle hub at the surfaces that contact the frame or fork dropouts.
Hydraulic Disc Brake
Summary A hydraulic disc brake uses a low-compressibility fluid to transmit pressure from a handlebar-mounted master cylinder to pistons in
High Pivot Suspension
Summary High-pivot suspension describes a rear-suspension design whose fixed main pivot or moving instant center sits substantially higher than on
Hyperglide
Summary Hyperglide is Shimano’s cassette-tooth and shift-ramp technology for controlled indexed shifting. Its shaped teeth and strategically positioned ramps guide
Hyperglide+
Summary Hyperglide+ is Shimano’s drivetrain technology for faster, smoother shifting while the rider continues pedaling. It combines specifically shaped cassette
Head Tube Angle
Summary Axle-to-crown is a fork-length measurement taken between the center of the front axle and the crown-race seat at the
Hub Motor
Summary A hub motor is an electric drive unit built into the front or rear wheel hub of an e-bike.
Head Tube Standards
Summary Head tube standards define how a bicycle frame, headset, and fork steerer fit together. Compatibility depends on the frame’s
Horst Link Suspension
Summary Horst Link is a four-bar rear suspension layout identified by a pivot on the chainstay, forward and normally below