Upgrade your drivetrain with the STONE Direct Mount Round Chainring, designed for ROTOR 24mm axle cranksets, including ROTOR 3D+ and 3DF cranksets.
Made from aerospace-grade 7075-T651 aluminum supplied by Aleris USA, this chainring offers excellent stiffness, durability, and reliable power transfer. The narrow-wide tooth profile improves chain retention, reduces chain drop, and helps keep the drivetrain running smoothly in demanding riding conditions.
Available in Round and Oval options, with tooth sizes from 30T to 38T, this chainring is suitable for 9 / 10 / 11 / 12-speed drivetrains. (Not for AXS flattop chain)
Specifications
| Item | Details |
|---|---|
| Brand | STONE |
| Product Name | Round Direct Mount Chainring |
| Fitment | For ROTOR 24mm Axle Crankset |
| Compatible Cranksets | For ROTOR 3D+ / 3DF |
| Material | Aerospace-grade 7075-T651 Aluminum |
| Supplier | Aleris USA |
| Color | Black |
| Finish | Anodized |
| Speed Compatibility | 9 / 10 / 11 / 12 Speed (Not for flattop or T-type chain) |
| Chainline | 52mm |
| Thickness | 9mm |
| Hardness | HB150 |
| Tooth Profile | Narrow-Wide Tooth |
| Frame Compatibility | Boost 148 |
| Tooth Options | 30T / 32T / 34T / 36T / 38T |
| Style Options | Round |
| CNC Accuracy | 0.03mm |
Compatibility
Crankset Compatibility
This chainring is designed for:
- For ROTOR 24mm axle cranksets
- For ROTOR 3D+
- For ROTOR 3DF
Drivetrain Compatibility
Compatible with:
- 9-speed drivetrain
- 10-speed drivetrain
- 11-speed drivetrain
- 12-speed drivetrain
- SRAM 12-speed standard chain (Not for 12s AXS flattop chain)
Frame Compatibility
- Suitable for Boost 148 frames
Important Note
Please confirm your crankset model, axle type, chainline, and required tooth size before purchase.
Narrow-Wide Tooth Design
The STONE chainring uses a newly designed wolf-tooth narrow-wide profile to improve riding stability and drivetrain performance.
Benefits
- Improves chain retention
- Reduces the risk of chain drop
- Enhances self-cleaning performance in mud and dirt
- Helps reduce drivetrain noise
- Provides smoother and more stable chain engagement
This design is especially useful for 1x drivetrain setups and off-road riding conditions.
Size and Weight
| Tooth Size | Max Diameter | Weight |
|---|---|---|
| 30T | 130mm | 63g |
| 32T | 138mm | 68g |
| 34T | 146mm | 74g |
| 36T | 154mm | 84g |
| 38T | 162mm | 91g |
Package Includes
- 1 × STONE Bike Chainring or 1 × Installation / Removal Tool
