Stone 3mm Offset Direct Mount Round Chainring for SRAM 3-Bolt Cranksets, Boost 148mm, 26T–40T, Aero & Hollow Options
This direct mount round chainring is built for SRAM 3-bolt (3-pin) cranksets and Boost 148 mm frames. It fits SRAM X9, X0, XX1, X01, GX, NX, S2210, and S1400 cranksets, supports 9/10/11/12-speed drivetrains, and comes in 26T–40T options with aero or hollow styles.
Key Specifications
| Item | Details |
|---|---|
| Brand | Stone |
| Chainring Type | Direct Mount Round Chainring |
| Crank Interface | SRAM 3-bolt / 3-pin direct mount |
| Offset | 3 mm |
| Frame Compatibility | Boost 148 mm |
| Material | Aerospace-grade Aluminum 7075-T651 |
| Color | Anodized Black / Silver |
| Speed Compatibility | 9 / 10 / 11 / 12-speed (not for AXS flattop chain) |
| Tooth Options | 26T / 28T / 30T / 32T / 34T / 36T / 38T / 40T |
| Thickness | 8 mm |
| Hardness | HB150 |
| CNC Precision | 0.03 mm |
| Package Includes | 1 × chainring, 3 × bolts |
Compatibility
This chainring fits SRAM 3-bolt direct mount cranksets, including:
- SRAM GX
- SRAM NX
- SRAM XX1
- SRAM XX1 Eagle
- SRAM X01
- SRAM X01 Eagle
- SRAM X0
- SRAM X9
- SRAM X7
- SRAM S2210
- SRAM S1400
Important Compatibility Notes
- Designed for the SRAM 3-bolt / 3-pin direct mount crank interface only.
- Does not fit 8-bolt interfaces.
- Does not support the SRAM AXS tooth profile.
- Does not support the SRAM T-Type / Transmission tooth profile.
Please verify your crank interface carefully before placing an order.
Aero Style vs Hollow Style
| Style | Features | Noise Level |
|---|---|---|
| Aero Style | Full-cover design with a stronger visual presence | Slightly louder chain noise |
| Hollow Style | Lightweight open design | Quieter than the Aero style |
Note: the Aero style may produce more chain noise than the Hollow style. Please take this into account before ordering.
Approximate Weight
| Style | 26T | 34T | 40T |
|---|---|---|---|
| Aero Style | 50 g | 73 g | 96 g |
| Hollow Style | 45 g | 66 g | 86 g |
Actual weight may vary slightly due to production tolerances.
Product Features
- New narrow-wide wolf tooth design from the Stone workshop
- Enhanced chain retention to reduce chain drop
- Improved mud and dirt self-cleaning performance
- Lower chain noise thanks to an optimized tooth profile
- CNC-machined for an accurate fit and reliable performance
- Suitable for MTB, trail riding, and off-road use
Package Includes
- 1 × chainring
- 3 × black bolts
