Stone Road Bike Crankset

29mm DUB Spindle | 8-Bolt Direct Mount | 7050-T7451 Aerospace Aluminum

Engineered for riders who care about precision, stiffness, and long-term durability.
Built for road and gravel cyclists who expect more than appearance, the Stone 8-Bolt DUB Crankset combines advanced materials, tight machining tolerances, and real fatigue-tested strength.

⚙ Key Specifications

🏗 Premium Materials

Crank Arms — 7050-T7451 Aluminum

Chosen for its excellent fatigue resistance and structural reliability under repeated pedaling loads.

Other Components — 7075-T651 Aluminum

Used where maximum rigidity and strength-to-weight ratio are critical.

Trusted Raw Material Sources

Supplied by respected U.S. aluminum producers including Aleris and Aleco, ensuring stable metallurgical quality from billet to final product.

🔬 Precision CNC Manufacturing

Every crankset is fully machined in-house for complete quality control.

Renishaw In-Process Probing

• Real-time dimensional measurement during machining
• Automatic compensation for tighter tolerances
• Accurate centering and consistent production quality

In-House Production Control

From raw billet to final assembly, every stage is controlled internally.

⚙ Spindle Tolerance Standards

Power transfer begins at the spindle — precision matters.

These tolerances help deliver:

• Smooth engagement
• Reduced play
• Better bearing alignment
• Long-term durability under torque load

🧪 Real Fatigue Testing

Validated through real-world structural testing across multiple crank lengths and load angles.

✅ 45° / 1800N / 100,000 cycles — Passed
✅ 30° / 1800N / 100,000 cycles — Passed

This crankset was refined through months of repeated load testing — not just computer simulation.

⚖ Weight by Length

🚲 Compatibility Notes

Standard Road & Gravel Frames

146mm Q-Factor / 43.5mm Chainline fits most modern road and gravel setups.

DUB Wide Gravel Frames

Need wider spindle version:

• Target Q-Factor: 151–152mm
• Chainline: 47.5mm

Custom spindle options available on request.

📦 Package Includes

• Right Crank Arm ×1
• Left Crank Arm ×1
• 29mm Spindle ×1
• Pedal Washers ×2
• 3mm Spacer ×1
• Mounting Bolts ×8
• Assembly Grease ×1

💡 Why Choose Stone?

Stone focuses on engineering honesty over marketing hype.

Built for cyclists who understand:

• material grades
• machining tolerances
• fatigue life
• drivetrain alignment
• long-term reliability

If you read spec sheets and care how components are made, this crankset was built for you.