STONE 8-Bolt Direct Mount Chainring for SRAM T-Type & AXS Flattop 12-Speed Chains — 3mm Offset, 7075-T651 Aluminum, 26T–40T for XX Eagle SL, X0 & GX Eagle Cranksets
This STONE 8-bolt direct mount chainring is engineered specifically for SRAM T-Type MTB 12-speed chains and SRAM AXS Flattop 12-speed chains, offering a precise fit for modern SRAM Eagle drivetrains.
With a 3mm inner offset and a 52mm chainline, it suits Boost 148 frames, 142mm frames, and ordinary 135mm frames, depending on your crank and drivetrain setup.
CNC machined from aerospace-grade 7075-T651 aluminum alloy, the chainring combines high stiffness, strong durability, and lightweight performance on the trail.
Specifications
| Item | Details |
|---|---|
| Brand | STONE |
| Material | Aluminum 7075-T651 |
| Color | Black / Silver |
| Style Options | Hollow / Aero |
| Tooth Options | 26T / 28T / 30T / 32T / 34T / 36T / 38T / 40T |
| Chain Type | SRAM T-Type MTB 12s / SRAM AXS Flattop 12s |
| Crank Compatibility | For SRAM XX Eagle SL / XX Eagle / X0 Eagle / GX Eagle |
| Offset | 3mm inner offset |
| Chainline | 52mm |
| Frame Compatibility | Boost 148 / 142mm / ordinary 135mm frame |
| Thickness | 6.7mm |
| Hardness | HB150 |
| Processing Precision | 0.03mm |
| Package | 1 × Chainring |
Important Compatibility Notice
Please check your chain type, crank model, and frame spacing carefully before purchasing.
This chainring is designed for:
- SRAM T-Type MTB 12-speed chain
- SRAM AXS Flattop 12-speed chain
It fits the following cranksets:
- SRAM XX Eagle SL crankset
- SRAM XX Eagle crankset
- SRAM X0 Eagle crankset
- SRAM GX Eagle crankset
- Other SRAM direct mount cranksets with the same interface
Chainring Style Options
This chainring is available in two styles: Hollow Style and Aero Style.
| Style | Advantages |
|---|---|
| Hollow Style | Lighter design, lower chain noise |
| Aero Style | Higher rigidity, integrated appearance, some aerodynamic benefit |
Hollow Style
The Hollow Style is a great choice for riders who prefer lower weight and a quieter drivetrain.
Aero Style
The Aero Style provides stronger rigidity and a more integrated look. It also offers some aerodynamic benefit, especially for riders who prefer a clean and solid appearance.
Please note: the Aero Style may produce slightly more chain noise than the Hollow Style.
Size & Weight — Aero Style
| Size | Diameter | Weight |
|---|---|---|
| 26T Aero | 121.5 mm | 48 g |
| 28T Aero | 129.5 mm | 55 g |
| 30T Aero | 137.5 mm | 60 g |
| 32T Aero | 146 mm | 67 g |
| 34T Aero | 154 mm | 77 g |
| 36T Aero | 162 mm | 85 g |
| 38T Aero | 170 mm | 92 g |
| 40T Aero | 178 mm | 100 g |
Size & Weight — Hollow Style
| Size | Diameter | Weight |
|---|---|---|
| 26T Hollow | 121.5 mm | 45 g |
| 28T Hollow | 129.5 mm | 50 g |
| 30T Hollow | 137.5 mm | 56 g |
| 32T Hollow | 146 mm | 61.5 g |
| 34T Hollow | 154 mm | 66 g |
| 36T Hollow | 162 mm | 73 g |
| 38T Hollow | 170 mm | 82.5 g |
| 40T Hollow | 178 mm | 88 g |
Note: Actual weight may vary slightly due to production tolerance.
Features
- Designed for SRAM T-Type MTB 12-speed chains
- Compatible with SRAM AXS Flattop 12-speed chains
- Direct mount design for SRAM Eagle cranksets
- 3mm inner offset
- 52mm chainline
- Supports Boost 148, 142mm, and ordinary 135mm frames
- Aerospace-grade 7075-T651 aluminum alloy
- High stiffness and lightweight construction
- Precision CNC machining
- Hollow and Aero styles available
- Multiple tooth options from 26T to 40T
Advantages
1. Aerospace-Grade 7075-T651 Aluminum
Made from high-stiffness 7075-T651 aluminum alloy, this chainring offers excellent strength, durability, and lightweight performance. It is built for demanding MTB riding conditions and long-term drivetrain performance.
2. High-Precision CNC Machining
Produced with precision CNC machining, the processing accuracy reaches 0.03mm. This helps ensure accurate installation, stable chain engagement, and reliable riding performance.
3. Optimized Tooth Profile for SRAM 12-Speed Chains
The tooth profile is designed for SRAM T-Type MTB 12-speed chains and SRAM AXS Flattop 12-speed chains, helping improve chain retention and drivetrain compatibility.
Package Includes
- 1 × Bike Chainring
