Stone Round Narrow-Wide Chainring for White Industries R30/M30 Cranks – 40T–56T, 7075-T651 Aluminum, 9–12 Speed
A precision round chainring designed exclusively for White Industries R30 and M30 cranks. Machined from aerospace-grade 7075-T651 aluminum with a narrow-wide tooth profile, it delivers dependable chain retention, quiet running, and consistent performance for road, gravel, and folding bike builds.
Key Specifications
- Material: Aerospace high-stiffness aluminum 7075-T651
- Color: Black / Silver
- Tooth profile: Narrow-wide, designed for 1x drivetrains
- Speed compatibility: 9/10/11/12 speed
- Teeth: 40T–56T
- Thickness: 4 mm
- Hardness: HB150
- Processing precision: 0.03 mm (high-precision CNC)
Compatibility
This chainring fits White Industries R30 and M30 cranks only. It is not compatible with other cranks, and White Industries square-tapered cranks cannot be installed because the interface shape is different.
| Crank | Compatible |
|---|---|
| White Industries R30 | Yes |
| White Industries M30 | Yes |
| White Industries square-tapered cranks | No – different interface shape |
| Other cranks | No |
Chain Compatibility Notes
- By default, SRAM AXS Flattop and T-Type 12s chains are not supported. Contact us if you would like a customized AXS T-Type tooth shape.
- If you use a Shimano 12s chain, please switch to a KMC, YBN, or SUMC 12s quick link, as the original 12s chain is too narrow.
Chainline and Intended Use
The chainline is optimized for road bikes and gravel bikes. It is not suitable for MTB.
Tooth Count and Maximum Diameter
| Teeth | Max Diameter (mm) | Weight |
|---|---|---|
| 40T | 169 | — |
| 42T | 178 | — |
| 44T | 186 | — |
| 46T | 194 | — |
| 48T | 202 | — |
| 50T | 210 | — |
| 52T | 219 | — |
| 54T | 226 | 142 g |
| 56T | 235 | 151 g |
Features and Advantages
- Stone workshop new-design narrow-wide teeth: enhanced anti-chain-drop performance, improved self-cleaning from mud and dirt, and reduced noise.
- High-strength 7075-T651 aluminum: excellent stiffness and endurance.
- High-precision CNC machining: 0.03 mm working accuracy ensures a top-quality riding component.
Package Contents
- 1 x bike chainring
