STONE / STONEDW 29mm DUB 8-Bolt Direct Mount Road / Gravel Crankset
A precision-machined road and gravel crankset designed for 29mm DUB systems, 8-bolt direct mount components, and high-strength long-distance riding use.
Compatibility
- for road bike / gravel bike frames
- for 29mm DUB bottom bracket systems
- for SRAM AXS road drivetrains
- for FORCE / RED / RIVAL compatible setups
- Crank parameters compatible to SRAM FORCE FC-FRC-D1
- for road and gravel 1x / 2x drivetrain configurations with compatible 8-bolt components
- for 8-bolt direct mount chainrings, spiders, and power meters
Not Compatible With
- not for Shimano Hollowtech II 24mm bottom brackets.
- not for 3-bolt direct mount chainrings, spiders, or power meters.
- not for non-DUB bottom bracket systems without a compatible adapter.
- not for MTB wide chainline setups unless all fitment parameters are confirmed.
- not for bottom brackets or frames that do not support 29mm DUB spindle systems.
Size and Weight
155mm / 483.9g (17.07oz)
160mm / 491.5g (17.34oz)
162.5mm / 494.4g (17.44oz)
165mm / 507.5g (17.90oz)
167.5mm / 510.8g (18.02oz)
170mm / 514.5g (18.15oz)
172.5mm / 518.5g (18.29oz)
175mm / 525.5g (18.53oz)
Weight may vary slightly due to production batches.
Product Specifications
Brand: STONE / STONEDW
Spindle Diameter: 29mm DUB
Interface: 8-bolt direct mount
Q-Factor: 146mm
Crank Parameters: compatible to SRAM FORCE FC-FRC-D1
Bike Type: Road Bike / Gravel Bike
Crank Length: 155mm / 160mm / 162.5mm / 165mm / 167.5mm / 170mm / 172.5mm / 175mm
Color: Black / Silver
Surface Finish: Anodized
Crank Arms: 7050-T7451 Aluminum
Other Components: 7075-T651 Aluminum
Direct Mount Interface
- 8-bolt direct mount interface for modern road and gravel drivetrain setups.
- Compatible with 8-bolt direct mount chainrings, spiders, and power meter spiders.
- Designed for AXS-style road and gravel crank configurations.
- Provides stable connection, accurate positioning, and reliable power transfer.
Precision Manufacturing
- In-house CNC machining for stable production quality.
- Renishaw probing system for in-process measurement.
- Automatic compensation helps improve machining accuracy.
- Designed for accurate centering and tight tolerance control.
- Consistent quality across production batches.
Spindle Precision
- High-strength aluminum alloy spindle.
- High roundness and geometric accuracy.
- Spline interface symmetry tolerance: ≤ 0.015mm.
- Spindle roundness tolerance: ≤ 0.01mm.
- Designed for smooth engagement and long-term durability under high torque.
Fatigue Testing
- Passed multi-configuration fatigue testing.
45° / 1800N / 100,000 cycles.
30° / 1800N / 100,000 cycles.
- Structure optimized through long-term testing for better strength and durability.
Material and Engineering
- Crank arms are made from premium 7050-T7451 aluminum alloy.
- 7050 aluminum provides excellent fatigue resistance and structural reliability.
- Other components are made from 7075-T651 aluminum alloy.
- 7075 aluminum provides high overall strength and an excellent strength-to-weight ratio.
- Aluminum sourced from U.S. suppliers such as Aleris and Aleco.
- Manufactured with high processing standards and precision-focused engineering.
Package Includes
- Right crank arm × 1
- Left crank arm × 1
- Spindle × 1
- Pedal washers × 2
- 3mm spacer × 1
- 8-bolt mounting bolts × 8
- Grease × 1
Installation Notice
- Please confirm your bottom bracket, frame clearance, chainring, spider, power meter, and drivetrain before purchase.
- Use only compatible 8-bolt direct mount chainrings, spiders, or power meters.
- This crankset is designed for 29mm DUB bottom bracket systems.
- Professional installation is recommended.
Default shipment: 120mm spindle. Please contact us before ordering if you need a 125mm spindle.
