Stone MTB Crankset 29mm DUB 8-Bolt Direct Mount Aluminum 7050-T7451 Crank for SRAM AXS T-Type XX1 XPLR 12s 13s 150 155 160 165 170 175mm STONEDW

STONE / STONEDW 29mm DUB 8-Bolt Direct Mount MTB Crankset

A precision-machined MTB crankset designed for 29mm DUB systems, 8-bolt direct mount components, and high-strength mountain bike use.

Compatibility

• for MTB / mountain bike frames
• for 29mm DUB bottom bracket systems
• for SRAM AXS T-Type drivetrains
• for XPLR 12s / 13s setup
• Crank Parameters compatible to SRAM XX1
• 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.

Spindle Length Options

• 128mm spindle: standard option (default shipment)
• 134mm spindle: wide option (available upon request)
• 143mm spindle: DH option (available upon request)

*Please contact us before ordering if you need a 134mm or 143mm spindle.

Bottom Bracket Setup Reference

• 128mm spindle: for BSA 68-73mm bottom brackets.
• 134mm spindle: for BSA 68-73mm bottom brackets, add 2pcs 3mm spacers on the outer side.
• 143mm spindle: for BSA 83mm bottom brackets.

Size and Weight

• 150mm / 534g (18.8oz)
• 155mm / 538g (19oz)
• 160mm / 555g (19.6oz)
• 165mm / 559g (19.7oz)
• 170mm / 569g (20.1oz)
• 175mm / 579g (20.4oz)

Weight may vary slightly due to production batches and spindle length.

Product Specifications

• Brand: STONE / STONEDW
• Model: 8-Bolt Direct Mount MTB Crankset
• Spindle Diameter: 29mm DUB
• Chainline: 52mm
• Q-Factor: 168mm
• Offset: 3mm inward
• Interface: 8-bolt direct mount
• Crank Length: 150mm / 155mm / 160mm / 165mm / 170mm / 175mm
• Color: Black / Silver
• Surface Finish: Anodized
• Crank Arms: 7050-T7451 Aluminum
• Other Components: 7075-T651 Aluminum

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.

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, chainline, frame clearance, and drivetrain before purchase.
• Use only compatible 8-bolt direct mount chainrings, spiders, or power meters.
• Professional installation is recommended.

Default shipment: 128mm spindle. Please contact us before ordering if you need a 134mm or 143mm spindle.