Tool B/b Unior XTR ISIS

The Unior Bottom Bracket/Lockring Tool is a premium, workshop-grade tool made for mechanics who want strength, precision, and wide compatibility.

Built from premium Flex Plus carbon steel, it delivers long-lasting durability and a perfect fit on modern and legacy bottom bracket systems.

Strong, High-Quality Material

Made from Premium Flex Plus carbon steel, ensuring exceptional strength, durability, and resistance to wear.

Easy to Use

Features a 1/2” square drive, making it compatible with standard ratchets, fixed handles, and torque wrenches. This gives you excellent leverage for smooth installation and removal.

This tool fits a variety of bottom bracket and e-bike systems:

• Shimano Octalink® bottom brackets with outside notches
• Bontrager® ISIS Drive® bottom brackets
• Truvativ® ISIS Drive® bottom brackets
• Bosch® Generation 3 & Generation 4 e-bike front chainring lockrings

Secure, Precise Fit

The precisely machined splines ensure a tight connection, reducing the chance of slipping or damaging the BB cups or lock-ring.