This STONE 8-bolts direct mount chainring is specially designed for SRAM T-Type MTB 12-speed chains and SRAM AXS Flattop 12-speed chains.
It features a 3mm inner offset and 52mm chainline, suitable for Boost 148 frames, 142mm frames, and ordinary 135mm frames depending on crank and drivetrain setup.
Made from aerospace-grade 7075-T651 aluminum alloy, this chainring provides high stiffness, strong durability, and lightweight riding performance.
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:
- for SRAM T-Type MTB 12-speed chain
- for SRAM AXS Flattop 12-speed chain
It fits the following cranksets:
- For SRAM XX Eagle SL crankset
- For SRAM XX Eagle crankset
- For SRAM X0 Eagle crankset
- For SRAM GX Eagle crankset
- For 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 | Notice |
|---|---|---|
| Hollow Style | Lighter design, lower chain noise | Smallest size is 28T |
| Aero Style | Higher rigidity, integrated appearance, some aerodynamic benefit | Chain noise may be slightly higher |
Hollow Style
The Hollow Style is a great choice for riders who prefer lower weight and quieter drivetrain performance.
Please note: Hollow Style is not available in 26T. The smallest Hollow size is 28T.
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: Aero Style may produce slightly more chain noise than Hollow Style.
Size & Weight — Aero Style
| Size | Diameter | Weight |
|---|---|---|
| 26T Aero | 113.3mm | 49g |
| 28T Aero | 121.5mm | 54g |
| 30T Aero | 129.5mm | 60g |
| 32T Aero | 137.5mm | 66g |
| 34T Aero | 146mm | 75g |
| 36T Aero | 154mm | 84g |
| 38T Aero | 162mm | 90g |
| 40T Aero | 170mm | 98g |
Size & Weight — Hollow Style
| Size | Diameter | Weight |
|---|---|---|
| 28T Hollow | 121.5mm | 53g |
| 30T Hollow | 129.5mm | 58g |
| 32T Hollow | 137.5mm | 61g |
| 34T Hollow | 146mm | 69g |
| 36T Hollow | 154mm | 75g |
| 38T Hollow | 162mm | 80g |
| 40T Hollow | 170mm | 86g |
Note: The 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, helping 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
