STONE Oval Direct Mount Narrow-Wide Chainring for Rotor 30mm Cranks (5mm Offset, 30T–38T)
Overview
The STONE oval direct mount narrow-wide chainring is built for Rotor cranksets with a 30mm spindle, including REX 1.1, REX 2.1, 3D+ XC2, and 3DF XC2. With a 5mm offset and 9–12 speed compatibility, it delivers stable chain retention, smooth pedaling, and dependable durability for MTB, XC, and trail riding.
Machined from high-strength 7075-T651 aerospace-grade aluminum, the chainring combines excellent stiffness with long-lasting endurance. The STONE wolf-tooth narrow-wide profile helps reduce chain drops, improves mud-shedding performance, and lowers drivetrain noise for a cleaner, smoother ride.
Specifications
| Item | Details |
|---|---|
| Material | Aerospace Aluminum 7075-T651 |
| Color | Black, Anodized |
| Tooth Options | 30T–38T |
| Offset | 5 mm |
| Speed Compatibility | 9 / 10 / 11 / 12 Speed (not for AXS Flattop or T-type chains) |
| Thickness | 9 mm |
| Hardness | HB150 |
| Machining | High-Precision CNC Machining |
| Processing Accuracy | 0.03 mm |
Compatibility
This chainring fits the following Rotor crank models with a 30mm spindle:
- Rotor REX 1.1
- Rotor REX 2.1
- Rotor 3D+ XC2
- Rotor 3DF XC2
Not Compatible With
- Rotor R-Hawk
- Rotor R-Raptor
It supports 9–12 speed standard chains only; AXS Flattop and T-type chains are not supported. Please check your crank model carefully before placing an order.
Package Includes
- 1 × Bike Chainring
Key Features
- STONE wolf-tooth narrow-wide design for improved chain retention
- Helps prevent chain drops on rough terrain
- Enhanced self-cleaning performance in muddy or dirty conditions
- Reduced drivetrain noise for smoother riding
- 5mm offset design for compatible Rotor cranksets
- CNC-machined from high-strength 7075-T651 aluminum
- Black anodized finish for better corrosion resistance and a premium appearance
Advantages
Aerospace-Grade 7075-T651 Aluminum
Made from high-strength 7075-T651 aerospace aluminum, providing excellent stiffness, strength, and endurance for demanding riding conditions.
High-Precision CNC Processing
Manufactured with advanced CNC machining and a processing accuracy of 0.03 mm, ensuring precise fitment, smooth chain engagement, and reliable riding performance.
