STONE Direct Mount Oval Chainring for ROTOR Kapic, Aldhu, Vegast, Hawk, Raptor, INpower & 2INpower MTB Cranksets – Narrow-Wide, 30T–38T, 9–12 Speed
Upgrade your drivetrain with the STONE Direct Mount Oval Chainring, engineered specifically for ROTOR direct mount MTB cranksets. Precision CNC-machined from high-strength 7075-T651 aluminum, it pairs stiffness and durability with reliable chain retention and smooth shifting on the trail.
Key Features
- Brand: STONE
- Type: Direct mount oval chainring
- Tooth profile: Narrow-wide
- Shape: Oval
- Color: Black, anodized finish
- Speed compatibility: 9 / 10 / 11 / 12-speed chains (not compatible with AXS Flattop chains)
- Material: High-strength 7075-T651 aluminum
- Thickness: 8 mm
- Hardness: HB150
- CNC precision: 0.03 mm
- Chainline / offset: Same as the original ROTOR chainring
- Package includes: 1 × bike chainring
Compatibility
This chainring is designed for the following ROTOR direct mount cranksets:
| Compatible Cranksets |
|---|
| ROTOR Kapic |
| ROTOR ALDHU |
| ROTOR Vegast |
| ROTOR Hawk |
| ROTOR Raptor |
| ROTOR INpower |
| ROTOR 2INpower |
Chainline and offset match the original ROTOR chainring, so no additional spacers or adjustments are needed to replicate the stock setup.
Installation Guide
The chainring carries an arrow mark. For correct installation, position this arrow between the numbers “2” and “4” on the crankset.
Before riding, make sure the chainring is installed in the correct direction.
Important Notes on Chain Compatibility
Shimano 12-Speed Chains
If you use a Shimano 12-speed chain, replace the original Shimano 12-speed quick link with another compatible 12-speed quick link, such as:
- KMC
- YBN
- SUMC
- Other compatible 12-speed quick links
The original Shimano 12-speed quick link may be too narrow for proper compatibility.
SRAM T-Type Chains
This standard version is not compatible with SRAM T-Type 12-speed chains. If you need a version for SRAM T-Type chains, please contact us for customization.
Product Advantages
Premium 7075-T651 Aluminum
Made from high-strength 7075-T651 aluminum alloy supplied by Aleris, a U.S. aluminum supplier serving major aircraft manufacturers including Airbus, Boeing, and Bombardier. This material provides:
- Excellent stiffness
- High strength
- Long-lasting durability
- Reliable performance under heavy riding conditions
High-Precision CNC Machining
STONE chainrings are manufactured using high-precision CNC equipment from Taiwan and Germany.
- Machining accuracy: 0.03 mm
- Improved fitment
- Better drivetrain smoothness
- Consistent tooth profile and chain engagement
Narrow-Wide Tooth Design
STONE’s newly designed narrow-wide tooth profile delivers:
- Improved chain retention
- Reduced risk of chain drop
- Better mud and dirt self-cleaning performance
- Lower drivetrain noise
- Stable performance for MTB
