Chaser Titanium UDH Direct Mount Derailleur Hanger for Shimano — Trek Madone Gen 8, Colnago V5RS, Y1RS & QUICKER ONE
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The Chaser UDH Titanium Direct Mount Derailleur Hanger is developed based on the UDH (Universal Derailleur Hanger) standard , designed for high-performance road bikes that demand maximum drivetrain precision with reduced weight.
Manufactured from aerospace-grade TC4 titanium using full CNC machining, this hanger combines lightweight construction with excellent rigidity and durability. Compared to traditional UDH systems, the optimized direct-mount structure simplifies the drivetrain interface while achieving meaningful weight savings.
This product is a direct-mount UDH solution , specifically intended for Shimano R-series rear derailleurs with extended mounting interfaces . Compared to a conventional UDH + Shimano Link setup, it offers a cleaner structure and lower total system weight.
Version Options
UDH-RD1｜Direct Mount Version (Shimano Only)
Compatible with Shimano R-series rear derailleurs (with extended hanger interface)
Lightweight direct-mount structure
Not compatible with SRAM or Campagnolo rear derailleurs
Bike Compatibility
Road bike frames using the UDH standard
Examples include (but are not limited to):
Trek Madone Gen 8
Colnago V5RS
Colnago Y1RS
Van Rysel / Quick Pro and other UDH-equipped road bikes
Not Compatible With
Older Shimano rear derailleurs without extended hanger interface
Non-UDH frame designs
Direct-mount version is not compatible with SRAM or Campagnolo rear derailleurs
Weight Comparison
Traditional UDH system (reference): approx. 42.2 g
Chaser UDH Titanium Direct Mount Hanger (complete set): approx. 33.9 g
Significant weight reduction compared to conventional UDH setups.
Material & Specifications
Material: TC4 Titanium
Manufacturing: Full CNC machining
Axle standard: P1.0 (optional P1.5 nut available)
Recommended installation torque: 25 Nm
Adjustment Spacers (Included)
Fine-tuning spacers included (optional installation)
Spacer thickness: 0.1 mm per piece
Function:
Installed between derailleur and hanger
Prevents axial movement of the rear derailleur
️ After installing or replacing the hanger, rear derailleur indexing and alignment must be re-adjusted according to manufacturer specifications.
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