STONE Round Oval Chainring 30T–38T Direct Mount for RaceFace Cinch Cranks (Next SL, SIXC, Turbine, Atlas, AEffect)
Overview
The STONE round oval chainring with 3.5mm offset mounts directly on RaceFace Cinch-system cranks. It is precision CNC-machined from high-strength 7075-T651 aluminum, delivering excellent stiffness and durability for trail, enduro, and all-mountain riding.
Key Features
- Material: High-strength aluminum 7075-T651, hardness HB150
- Construction: Full CNC machining with a working accuracy of 0.03mm
- Tooth profile: Narrow-wide design with wolf-tooth shaping to prevent chain drop and help shed mud, soil, and sand
- Color: Black
- Oval force angle: 110°–112°
Specifications
- Offset: 3.5mm
- Chainline: 52mm
- Thickness: 8mm
- Available sizes: 30T, 32T, 34T, 36T, 38T
Size, Diameter & Weight
| Model | Teeth | Diameter (mm) | Weight (g) |
|---|---|---|---|
| RF-Oval | 30T | 138 | 58 |
| RF-Oval | 32T | 146 | 65 |
| RF-Oval | 34T | 154 | 72 |
| RF-Oval | 36T | 162 | 79 |
| RF-Oval | 38T | 170 | 84 |
Chain Compatibility
Compatible with 9, 10, 11, and 12-speed chains.
- Not compatible with T-type 12-speed chains. A custom tooth shape would be required for T-type chains.
- Shimano 12-speed chains: The original Shimano 12-speed quick link is too narrow for this chainring. You must replace it with another brand’s 12-speed quick link (such as KMC, YBN, or SUMC) before use.
Compatibility
Crank Fitment
Fits RaceFace Cinch-system cranks:
| Component | Compatible Models |
|---|---|
| Crankarms | RaceFace Next SL, SIXC, Turbine, Atlas, AEffect (Cinch) |
| Mounting system | RaceFace Cinch direct mount, 3.5mm offset |
| Rear frame spacing | 135mm, 142mm, and 148mm Boost |
Package Contents
- 1 x Chainring
