Titanium UDH Derailleur Hanger Replacement｜Shimano Direct Mount｜For Trek & Colnago Road Bikes

Product Description

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.

Compatibility Check: Due to the complexity of original equipment manufacturer (OEM) parts' models and batches, there may be instances where this product is incompatible.

Upon receiving this product, please compare it with the OEM specifications to ensure compatibility before installation.

Torque Specifications: Install this product strictly according to the torque values specified in the OEM parts manual.Installation Issues: If you encounter any discrepancies with the OEM specifications or face difficulties at the initial stage of installation, stop immediately and contact customer service for assistance with returns or exchanges.

No Forced Installation: Do not force installation under any circumstances.Liability: Any damages resulting from forced installation or unauthorized modifications of this product (or its components) will be the sole responsibility of the buyer.

All products are photographed to accurately represent the colors you will see upon receipt.

Due to differences in lighting, angles, or screen settings, slight color variations may occur.

The actual product should be considered the standard.For "colored" and "blue" products, the coloring process may result in uneven color distribution, making each product unique.