Park Tool, HCW-5, Bottom bracket lockring tool

The Park Tool HCW-5 Bottom Bracket Lockring Tool is a professional-grade, double-ended specialty spanner designed specifically for installing and removing lockrings on cup-and-cone bicycle bottom brackets. This tool is an essential addition to any workshop, particularly for those working on vintage bicycles, classic track bikes, and older standard square-taper drivetrains.

Key Features

• Double-Ended Versatility
  Features two distinct hook configurations on a single handle to maximize compatibility and save toolbox space:
  • Three-Hook End: Designed to fit 3-notch lockrings with a maximum outside diameter of 46mm and a minor diameter (inside the notches) of 40mm. This configuration distributes torque across three points to prevent slipping.
  • Universal Single-Hook End: Adaptable to most notched lockrings with an external outer diameter between 43mm and 46mm.
• Industrial Build Strength
  Constructed from premium tool steel, laser-cut and heat-treated for extreme durability. The tool is heavily nickel-plated to resist corrosion, ensuring a lifetime of reliable performance in commercial shop settings.
• High-Leverage Handle
  The 11-inch (28 cm) long robust metal handle provides the leverage needed to tackle old, rusted, or over-tightened factory lockrings.

User Sentiment & Performance

The HCW-5 enjoys an excellent 4.7 out of 5-star rating globally, with praise from vintage bike collectors and professional mechanics alike.

Highlights from Reviews:

• Zero Component Damage: The 3-notch interface seats deeply into lockring slots, eliminating slipping or "cam-out" that can damage soft aluminum hardware or injure hands.
• Perfect Custom Preloads: Precision machining allows for subtle adjustments to the non-drive side cup, ensuring smooth bearing preload without loose play.

Note

The HCW-5 is specifically designed for bottom bracket lockrings. For tight fixed-gear rear wheel track cog lockrings, Park Tool recommends using the HCW-17 wrench instead.