Chaser X Specialized Direct-Mount Rear Derailleur Hanger | TC4 Titanium CNC | Fits Aethos / Tarmac / CruX / Diverge / Roubaix / Shiv TT Disc Brake Frames (Shimano Only, Not Compatible with Allez)
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Chaser direct-mount rear derailleur hanger, precision-machined from TC4 titanium with full CNC construction. It reduces weight from the ~35.5 g OEM piece to ~15.8 g (screws excluded) while maintaining stiffness and alignment, delivering crisp shifting. 0.1 mm shims are included to eliminate axial play between the hanger and derailleur. After installation or replacement, re-align and fine-tune shifting following Shimano's procedures.
Specifications
Material：TC4 Titanium Alloy
Process：Full CNC machining；polished + oxidation Coloring
Weight：≈ 15.8 g (hanger only, screws not included)
Torque：Recommended installation torque 1 Nm
Compatibility note: Shimano rear derailleurs only. Not compatible with SRAM or Campagnolo RDs. Designed for Specialized/S-Works disc-brake frames (see list below).
2018：CruX / Diverge / Roubaix Series DISC
2019：Venge / CruX / Diverge / Roubaix Series DISC
2020：Tarmac / Venge / CruX / Diverge / Roubaix Series DISC
2021：Tarmac / Venge / CruX / Diverge / Shiv TT Series DISC
2022：Tarmac / CruX / Diverge / Roubaix / Shiv TT Series DISC
2023：Tarmac / CruX / Diverge / Shiv TT Series DISC
2024：Aethos / Tarmac / CruX / Diverge / Roubaix / Shiv TT Series DISC
2025：Aethos / Tarmac / CruX / Diverge / Shiv TT Series DISC
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