Stone 130 BCD Narrow-Wide Chainring (38T–70T) for 1x Road and Folding Bikes — Shimano 5700/6700, SRAM Red, Rotor & Brompton 3Sixty
Upgrade your drivetrain with this high-precision Stone 130 BCD narrow-wide chainring, engineered for 1x drivetrain setups only. Machined from high-strength 7075-T651 aluminum alloy, it delivers excellent stiffness, durability, and chain retention for road, folding, and modified bike builds.
Key Features
- Brand: Stone
- BCD: 130 BCD
- Tooth options: 38T–70T
- Design: narrow-wide tooth profile
- Drivetrain compatibility: 1x speed only
- Material: high-strength aluminum 7075-T651
- Hardness: HB150
- Thickness: 4 mm
- CNC precision: 0.03 mm
- Surface treatment: high-speed CNC machining with anodized finish
- Colors: black / silver
- Style options:
- Hollow style: 38T–70T
- Aero style: 42T–70T
Important Notice
This chainring is designed for 1x drivetrain systems only.
It cannot be used for 2x setups and does not support front derailleur shifting.
Please confirm your bike uses a compatible 130 BCD crankset before ordering.
Compatibility
Fits 130 BCD cranksets, including:
- Shimano 5700
- Shimano 6700
- SRAM Red
- Rotor 130 BCD cranks
- Brompton / 3Sixty modified crank setups with 130 BCD
- Other compatible 130 BCD road or folding bike cranksets
Chain Compatibility
This chainring supports most common 9/10/11/12-speed chains.
| Chain Type | Compatibility |
|---|---|
| MTB chain | 9 / 10 / 11 / 12 speed |
| SRAM road chain | 9 / 10 / 11 speed |
| Shimano road chain | 9 / 10 / 11 / 12 speed |
| SRAM AXS 12s Flattop chain | Not compatible by default |
Important for Shimano 12-Speed Road Chains
If you use a Shimano 12-speed road chain, replace the original Shimano quick link with another brand of 12-speed quick link, such as:
- KMC
- YBN
- SUMC
- Other compatible 12-speed quick links
The original Shimano 12-speed road quick link is too narrow and may not fit properly.
For SRAM AXS Flattop Chains
This standard version does not support SRAM AXS 12-speed Flattop chains.
If you need a tooth profile compatible with the SRAM AXS Flattop chain, please contact us before ordering. Customization is available with an additional surcharge.
Size, Diameter & Weight Chart — Hollow Style
| Teeth | Max Diameter | Weight |
|---|---|---|
| 38T | 162 mm | 49 g |
| 40T | 170 mm | 61 g |
| 42T | 178 mm | 70 g |
| 44T | 186 mm | 74 g |
| 46T | 194 mm | 79 g |
| 48T | 202 mm | 84 g |
| 50T | 210 mm | 97 g |
| 52T | 219 mm | 104 g |
| 54T | 226 mm | 111 g |
| 56T | 235 mm | 119 g |
| 58T | 242 mm | 127 g |
| 60T | 250 mm | 136 g |
| 62T | 257 mm | — |
| 64T | 265 mm | — |
| 66T | 273 mm | — |
| 68T | 281 mm | — |
| 70T | 289 mm | — |
| 72T | 298 mm | — |
Note: The 38T size includes 5 additional bolt washers.
Package Includes
- 1 × chainring
- 5 × chainring bolts
- 5 × additional bolt washers (38T size only)
Advantages
1. Premium 7075-T651 Aluminum
Made from high-strength 7075-T651 aluminum alloy, this chainring offers excellent stiffness, strength, and long-lasting performance.
2. High-Precision CNC Machining
Manufactured with 0.03 mm CNC processing accuracy for precise tooth shape, smooth operation, and reliable chain engagement.
3. Narrow-Wide Tooth Design
The narrow-wide tooth profile improves chain retention and helps reduce chain drop, making it ideal for 1x drivetrain setups.
4. Lightweight and Durable
An optimized structure keeps the chainring lightweight while maintaining strong riding performance.
