STONE 29mm DUB 8-Bolt Direct Mount MTB Crankset for SRAM AXS T-Type XX1 XPLR 12s/13s, 150–175mm
Overview
A precision-machined mountain bike crankset built around a 29mm DUB spindle and an 8-bolt direct mount interface. The crank arms are CNC-machined from high-strength 7050-T7451 aluminum, making this a durable upgrade for demanding MTB and gravel riding.
Compatibility
This crankset is designed for the following frames, bottom brackets, and drivetrains:
| Component / System | Compatibility |
|---|---|
| Frame type | MTB / mountain bike frames |
| Bottom bracket | 29mm DUB bottom bracket systems |
| Drivetrain | SRAM AXS T-Type |
| Groupset | XPLR 12s / 13s setups |
| Crank parameters | Compatible with SRAM XX1 |
| Chainrings, spiders, power meters | 8-bolt direct mount only |
Not Compatible With
- Shimano Hollowtech II 24mm bottom brackets
- 3-bolt direct mount chainrings, spiders, or power meters
- 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)
Note: 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, with 2pcs 3mm spacers added on the outer side
- 143mm spindle: for BSA 83mm bottom brackets
Size and Weight
| Crank Length | 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.
Questions & Answers
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