STONE Round Chainring for Special 30mm Spindle MTB Cranks: Specs, Sizes and Fitment
Overview
The Stone BB30 round chainring is built for MTB riding and fits Special BB30 cranks with a 30mm spindle. It is CNC-machined from aerospace-grade aluminum and finished with a black anodized coating.
Key Specifications
- Model: STONE BB30 round chainring for Special crank
- Material: 7075-T651 aluminum, black anodized
- Thickness: 4mm
- Hardness: HB150
- Offset: 0mm
- Processing precision: 0.03mm
- Available tooth counts: 30T, 32T, 34T, 36T, 38T, 40T
- Chain compatibility: 9–12s chains (T-type 12s chains are not supported; message us to customize a T-type tooth shape if needed)
Compatibility
This chainring fits Special BB30 30mm cranks only. Other cranks cannot be installed.
Size and Weight Chart
| Model | Teeth | Diameter (mm) | Weight (g) |
|---|---|---|---|
| Special-Round | 30T | 130 | 53 |
| Special-Round | 32T | 138 | 59 |
| Special-Round | 34T | 146 | 61 |
| Special-Round | 36T | 154 | 71 |
| Special-Round | 38T | 162 | 81 |
| Special-Round | 40T | 170 | 90 |
Features
Stone’s narrow-wide tooth design improves chain retention, sheds mud and dirt more easily through better self-cleaning, and reduces noise.
Advantages
- Premium material: High-strength 7075-T651 aluminum supplied by Aleris, a supplier to aircraft makers Airbus, Boeing, and Bombardier, delivering excellent stiffness and endurance.
- High-precision CNC machining: Working accuracy of 0.03mm ensures a top-quality riding component.
Package Contents
- 1 x bike chainring
