The Park Tool BBT-22 Bottom Bracket Tool is a professional, shop-quality socket engineered to install and remove 20-spline cartridge-type bottom brackets. Specifically optimized with a 3/8-inch square drive fitting, it allows mechanics to seamlessly pair the tool with a standard ratchet, breaker bar, or digital torque wrench for accurate installations.

Key Features

• Universal 20-Spline Pattern:
  Designed with a 32mm external diameter featuring 20 flat-profile teeth, it guarantees maximum engagement with Shimano, Truvativ, Race Face, FSA, and Octalink splined bottom bracket cups.
• Investment Cast Steel:
  Built using premium-grade, heat-treated tool steel, this heavy-duty composition withstands immense workshop torque without cracking or slipping out of the splines.
• Over-Spindle Clearance:
  Intentionally hollowed out through the center to clear oversized axles, it fits cleanly over long ISIS Drive and Shimano Octalink spindles without requiring axle removal.
• Versatile Drive Interfaces:
  In addition to the internal 3/8" square drive socket, the outer casing features 1-inch (32mm) wrench flats. This permits use with large open-end wrenches, adjustable spanners, or the Park Tool FRW-1 holder.

User Sentiment & Performance

This tool maintains a near-flawless 4.8 out of 5-star rating globally across bike forums and retail platforms.

• Zero Cam-Out:
  Reviewers praise the updated flat tooth profile (which replaced the legacy BBT-2 model). It seats perfectly flush against aluminum or plastic bottom bracket cups, completely eliminating the slipping that ruins soft components.
• Torque Accuracy:
  Home builders note that the 3/8" socket integration is crucial for safety, enabling them to hit exact factory torque settings (typically around 30–45 Nm) with a torque wrench.