Upgrade your drivetrain with the Stone CNC direct mount chainring, designed for Shimano 12-speed MTB cranksets. Made from premium 7075-T651 aerospace-grade aluminum, this chainring delivers excellent stiffness, durability, and shifting stability for trail, XC, enduro, and everyday riding.
| Item | Details |
|---|---|
| Brand | Stone |
| Product Type | Direct Mount Chainring |
| Tooth Options | 30T–48T |
| Speed Compatibility | 9 / 10 / 11 / 12 Speed |
| Material | 7075-T651 Aerospace-Grade Aluminum |
| Supplier | Aleris USA |
| Color | Black, Silver |
| Thickness | 7 mm |
| Hardness | HB150 |
| Offset | 3 mm |
| Mount Type | Shimano Direct Mount |
| Compatibility | For Shimano M9100 / M8100 / M7100 / M6100 / MT900 / M9200 / M9220 cranksets |
Premium 7075-T651 Aluminum
Made from high-strength aerospace-grade aluminum supplied by Aleris USA, a material supplier associated with major aircraft manufacturers such as Airbus, Boeing, and Bombardier.
CNC Precision Machining
Manufactured with high-precision CNC processing and a machining accuracy of up to 0.03 mm, ensuring reliable fitment and smooth drivetrain performance.
Narrow-Wide Tooth Profile
Newly designed Stone narrow-wide tooth profile improves chain retention, reduces the risk of chain drop, and provides a more stable ride on rough terrain.
Improved Mud-Shedding Design
The tooth profile helps reduce mud buildup and improves self-cleaning performance in wet or muddy riding conditions.
Lower Noise, Smoother Riding
Optimized tooth engagement helps reduce drivetrain noise and provides a smoother pedaling experience.
This chainring is designed for the following Shimano direct mount cranksets:
Important Notice:
When using this chainring with a Shimano 12-speed chain, the original Shimano quick link may cause compatibility issues. We recommend replacing it with a compatible quick link from brands such as KMC or YBN for smoother operation.
Note: Chain connector / quick link is not included and must be purchased separately.
For customized colors, please leave a note when placing your order.
Available colors:


















