Stone Chainring 30mm for Rotor REX1 REX2 3df 3df+ Round
- Material: Aerospace Aluminum 7075-T651
- Offset: 5 mm
- Color: black, anodized
- Speed: 9/10/11/12 Speed
- Thickness: 9MM
- Hardness: HB150
- Fit for: Rotor 30mm Crank REX1 REX2 3DF 3DF+
- Chainline: 52mm
- Compatible to boost 148 frame