Precision-tuned for modern drivetrains, this dual-component bottom bracket and crank arm adjustment tool is a compact powerhouse engineered for seamless installation and removal of Shimano® external bearing cups — including the BB9000 series. Designed to deliver shop-level performance in a streamlined, easy-to-handle form, it engages both the 16 outer notches and 8 internal splines with perfect alignment and grip.

Whether you're a home mechanic or professional tech, this tool offers superior compatibility, ergonomic control, and material durability to ensure damage-free service every time.

🔧 Dual Engagement Design – One Tool, Two Functions

This isn’t just a standard BB wrench — it’s a dual-fitment system:

• Part 1: CrMo Steel Main Tool

  • Engages the 16 notches of Shimano® BB9000 and similar external bearing cups

  • High-torque ready and incredibly precise

• Part 2: Polymer Cap Tool

  • Designed to engage 8 internal splines on crank arm adjustment caps

  • Prevents rounding and over-torquing of delicate plastic caps

Together, they ensure comprehensive coverage of Shimano®'s bottom bracket systems, delivering accurate and safe installation or removal.

⚙️ Material Construction – Built for Torque and Longevity

• CrMo Steel Body (Main Tool)
  Extremely durable and hardened to resist wear from repeated high-torque applications.

• Engineering Grade Polymer (Cap Tool)
  Lightweight, yet tough enough to handle cap adjustments without marring or stripping plastic surfaces.

These materials offer the perfect balance of strength, weight, and surface safety — allowing both home and pro users to perform work with confidence.

📐 Compact Size, Big Performance

• Dimensions: ø5.2 x 4 cm (per piece)

• Total Weight: Just 137 grams for the full 2-piece set

The compact form ensures it fits comfortably in the hand, reduces tool slippage, and takes up minimal space in your toolkit.