Product Description

The S-PARTS DUB Titanium Crank Arm Bolt & Self-Extracting Cap Set is engineered for SRAM DUB crank systems and Quarq Red / Force / Red drivetrains, delivering precision fitment, ultra-light performance, and aerospace-grade titanium strength for high-performance cycling builds.

Technical Specifications

• Product Type: Crank Arm Bolt & Self-Extracting Cap Set
• Compatibility: SRAM DUB / Quarq / Force / Red crank systems
• Weight: Approx. 11.3g per set
• Material: Aerospace-grade Ti-6Al-4V titanium alloy (Grade 5 titanium)
• Tool Compatibility:
  • PARK TOOL FR-5.2
  • Shimano TL-LR15

Torque Specifications

• Crank Arm Fixing Torque: 54 Nm
• Self-Extracting Cap Torque: 3 Nm

Proper torque application is critical to ensure secure installation, prevent thread damage, and maintain long-term drivetrain stability.

Installation Reference (Important)

This product includes a real-world installed reference image showing correct assembly positioning.

Please refer to the installation image before tightening to ensure:

• Correct crank arm alignment
• Proper bolt engagement
• Safe torque application sequence

Surface Finishing Options

Vacuum Nitriding Colors (Gold / Black / Blue / Titanium)

• Deep metal diffusion coloration
• High abrasion resistance
• Long-term durability in rain, mud, and harsh riding conditions

Anodized Titanium Colors (Indigo / Green / Purple / Candy)

• Multi-layer electrochemical anodizing
• High saturation gradient color finish
• Designed for custom bike builds and aesthetic personalization

Special Graphic Editions

Prism, Splatter Pop, Neon Splatter, Rabbit Camo, Great Wave, Tiger Green-Gold, Jaguar Green-Gold, Snowstorm, Topographic Glacier, and more.

Engineering & Manufacturing Quality

• Precision forged at 650°C high-temperature forming
• Each mold limited to ≤300 cycles for accuracy control
• CNC machining with micron-level tolerance precision
• Optimized thread engagement for smooth installation and anti-slip performance

Titanium Performance Advantage

Made from aerospace-grade Ti-6Al-4V titanium alloy (Grade 5 titanium):

• Tensile strength: ≥1050 MPa
• Exceeds industry standard (>895 MPa)
• Comparable to 10.9-grade steel strength level
• Approximately 50% lighter than steel equivalents

Delivers the perfect balance of strength, precision, and ultra-lightweight performance for modern drivetrain upgrades.

Design Philosophy

S-PARTS combines engineering precision with cycling aesthetics:

• High-performance drivetrain hardware + visual customization
• Eliminates standard OEM appearance
• Designed for road, MTB, and performance builds
• Built for riders who value both function and identity