The Park Tool BT-2 Cable Stretcher is a purpose-built workshop tool that makes cable-actuated brake and derailleur adjustments more precise by helping remove slack before final tuning. Proper cable tension is crucial for crisp shifting and responsive braking, and the BT-2 gives you controlled leverage to pull housing and cable taut while securing the anchor bolt. This reduces guesswork, speeds up adjustments, and improves overall drivetrain and brake performance — especially on bikes with older or stiffer cables.

Constructed from sturdy, service-grade materials, the BT-2 provides a secure grip and ample leverage without damaging housing or cable jackets. The ergonomic design lets you pull cable tight with controlled force while your other hand adjusts cable anchors or torque bolts. Whether you’re setting up a new drivetrain, fine-tuning shifting, or troubleshooting cable stretch and slack, this cable stretcher is a valuable addition to any mechanic’s toolkit.