Upgrade your drivetrain with the Stone 3-Bolt Direct Mount Round Chainring, designed for reliable chain retention, smooth pedaling, and excellent durability. Made from high-strength 7075-T651 aerospace-grade aluminum, this chainring offers a great balance of stiffness, lightweight performance, and long-lasting wear resistance.
The integrated chainring guard provides additional protection for the teeth and drivetrain, making it ideal for MTB, trail, and off-road riding.
| Item | Details |
|---|---|
| Brand | Stone |
| Product Type | Direct Mount Round Chainring with Chainring Guard |
| Material | 7075-T651 Aerospace-Grade Aluminum |
| Offset | 3mm Inner Offset |
| Recommended Frame Spacing | 148mm Boost |
| Chainline | 52mm |
| Speed Compatibility | standard 9 / 10 / 11 / 12 Speed (Not for AXS Flattop chain) |
| Color Options | Anodized Black / Silver |
| Thickness | 7mm |
| Hardness | HB150 |
| Processing Precision | 0.03mm |
| Tooth Options | 30T / 32T / 34T / 36T |
Compatible with SRAM MTB direct mount cranksets, including:
Important Notice:
When using a Shimano 12-speed chain, a 12-speed chain quick link / connector is required. Otherwise, the Shimano 12-speed chain may not work properly with this chainring.
If you use AXS flattop chain, please contact us to customize.
| Teeth | Weight | Maximum Diameter |
|---|---|---|
| 30T | 104g with chainring guard | 130mm |
| 32T | 115g with chainring guard | 138mm |
| 34T | 121g with chainring guard | 146mm |
| 36T | 130g with chainring guard | 154mm |
Made from high-strength 7075-T651 aluminum, supplied by Aleris USA, a trusted supplier serving major aircraft manufacturers such as Airbus, Boeing, and Bombardier. This material provides excellent stiffness, strength, and endurance for demanding MTB use.
Each chainring is CNC-machined with a processing accuracy of up to 0.03mm, ensuring excellent fitment, smooth drivetrain performance, and reliable power transfer.
The new Stone narrow-wide tooth profile helps hold the chain securely in place, reducing the risk of chain drop during aggressive riding, rough terrain, and muddy conditions.
The optimized tooth design improves self-cleaning performance, helping remove mud, dirt, and debris while reducing drivetrain noise.

