STONE 8-Bolt DUB Road & Gravel Crankset: 155–175mm Arms, 29mm Spindle, SRAM AXS FORCE / RED / RIVAL Compatibility
Overview
The STONE / STONEDW road and gravel crankset combines 7050-T7451 aluminum crank arms, a 29mm DUB spindle, and an 8-bolt direct mount interface, CNC-machined in-house for precise fitment. It is available in eight crank lengths from 155mm to 175mm and in black or silver anodized finishes.
Default spindle length: 120mm. If you need a 125mm spindle, please contact us before ordering.
Key Features
- 29mm DUB spindle for compatible road and gravel bottom bracket systems.
- 8-bolt direct mount interface for compatible chainrings, spiders, and power meter spiders.
- 1x and 2x support when paired with compatible drivetrain components.
- 146mm Q-factor, with crank parameters compatible with SRAM FORCE FC-FRC-D1.
- 7050-T7451 aluminum crank arms and 7075-T651 aluminum components.
- Eight crank lengths to suit different fit preferences.
Compatibility
This crankset is designed for road and gravel builds using compatible 29mm DUB bottom brackets and 8-bolt direct mount components. It works with compatible SRAM AXS road drivetrain setups, including FORCE, RED, and RIVAL, subject to confirmation of spindle length, chainline, frame clearance, and component fit.
Supported configurations:
- Road and gravel 1x / 2x drivetrains.
- Compatible 8-bolt direct mount chainrings and spiders.
- Compatible 8-bolt power meter spiders.
Compatibility with SRAM FORCE FC-FRC-D1 crank parameters does not guarantee fit with every frame, bottom bracket, or drivetrain combination. Please confirm your complete setup before ordering.
Not Compatible With
- Shimano Hollowtech II 24mm bottom brackets.
- 3-bolt direct mount chainrings, spiders, or power meters.
- Non-DUB bottom brackets without a suitable compatible adapter.
- Frames or bottom brackets that cannot accommodate the specified DUB spindle.
- MTB wide-chainline setups unless all fitment requirements have been confirmed.
Product Specifications
| Specification | Details |
|---|---|
| Brand | STONE / STONEDW |
| Intended Use | Road / Gravel |
| Spindle Diameter | 29mm DUB |
| Default Spindle Length | 120mm |
| Alternative Spindle Length | 125mm — contact us before ordering |
| Mounting Interface | 8-bolt direct mount |
| Drivetrain Configuration | 1x / 2x with compatible components |
| Q-Factor | 146mm |
| Crank Parameters | Compatible with SRAM FORCE FC-FRC-D1 |
| Crank Arm Material | 7050-T7451 aluminum |
| Other Component Material | 7075-T651 aluminum |
| Finish | Anodized |
| Colors | Black / Silver |
Crank Length & Weight
| Crank Length | 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 |
Weights may vary slightly between production batches.
Precision Manufacturing
Every crankset is CNC-machined in-house with Renishaw in-process probing and automatic machining compensation, maintaining dimensional accuracy, precise centering, and consistent production quality.
The high-strength aluminum spindle is held to the following tolerances:
- Spline interface symmetry tolerance: ≤0.015mm
- Spindle roundness tolerance: ≤0.01mm
These precision controls support accurate component engagement and fit.
Materials & Durability
The crank arms are made from 7050-T7451 aluminum alloy for fatigue resistance and structural strength, while other components use 7075-T651 aluminum alloy for a high strength-to-weight ratio. Aluminum is sourced from U.S. suppliers and precision-machined to controlled production standards.
Fatigue Testing
The crankset passed fatigue testing under both of the following conditions:
| Test Angle | Applied Load | Cycles |
|---|---|---|
| 45° | 1800N | 100,000 |
| 30° | 1800N | 100,000 |
The structure has been refined through testing to support 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
Before Ordering & Installation
Before purchase, confirm your bottom bracket, spindle length, chainline, frame clearance, chainring, spider, power meter, and drivetrain compatibility.
Use only compatible 8-bolt direct mount components and a bottom bracket system suitable for the specified 29mm DUB spindle. Professional installation is recommended.
Orders ship with a 120mm spindle by default. Please contact us before ordering if you require a 125mm spindle.
