Dial in the details that matter.
The Chaser Sports B-axle bolt is a precision upgrade for Shimano Ultegra and Dura-Ace rear derailleurs, built for riders who obsess over performance and weight. CNC machined from premium 7075-T6 aluminum, it delivers the strength you need in a noticeably lighter package.
Weighing in at approximately 1 gram lighter than stock, it’s a small change that contributes to a more refined, weight-conscious build—because marginal gains add up.
Why Upgrade?
- Ultralight design: ~1g lighter than stock Ultegra & Dura-Ace bolts
- Premium construction: CNC machined from high-strength 7075-T6 aluminum
- Detail-focused upgrade: Perfect for fine-tuning your drivetrain setup
- Custom look: Available in black, gold, and red anodized finishes
For riders who know that the smallest components can make the biggest difference.
