The STONE 135BCD narrow-wide chainring is designed for riders who need a strong, precise, and reliable single-chainring setup.
Made from high-strength 7075-T651 aluminum alloy, this chainring is CNC-machined with high precision and finished with anodizing for improved durability and corrosion resistance.
It is suitable for 1x drivetrains only and is available in multiple tooth sizes from 42T to 60T.
Product Specifications
| Item | Specification |
|---|---|
| Product Name | STONE 135BCD Narrow Wide Chainring |
| BCD | 135BCD |
| Chainring Type | Round |
| Tooth Profile | Narrow Wide |
| Material | 7075-T651 High-Strength Aluminum Alloy |
| Material Hardness | HB150 |
| Thickness | 4 mm |
| CNC Precision | 0.03 mm |
| Surface Treatment | Anodized, High-Speed CNC Machined |
| Color Options | Black, Silver |
| Drivetrain Type | 1x Only |
| Teeth Options | 42T / 44T / 46T / 48T / 50T / 52T / 54T / 56T / 58T / 60T |
Important Compatibility Notice
This chainring is designed for 1x drivetrain systems only.
It is not compatible with 2x drivetrains and does not support front shifting.
Chain Compatibility
| Chain Type | Compatibility |
|---|---|
| MTB 8 / 9 / 10 / 11 / 12-speed chains | Compatible |
| Road 8 / 9 / 10 / 11-speed chains | Compatible |
| Shimano 12-speed road chains | Compatible with quick link replacement |
| SRAM AXS 12-speed Flattop chains | Not compatible |
Shimano 12-Speed Chain Notice
If you use a Shimano 12-speed road chain, the original Shimano 12-speed quick link may be too narrow.
For better compatibility, please replace the original Shimano quick link with another compatible 12-speed quick link, such as:
- KMC
- YBN
- SUMC
- Other compatible 12-speed quick links
SRAM AXS Flattop Chain Notice
The standard version of this chainring does not support SRAM AXS 12-speed Flattop chains.
If you need a tooth profile compatible with SRAM AXS Flattop chains, please contact us before ordering. Customization is available with an extra surcharge.
Size, Diameter & Weight
| Teeth | Max Diameter | Hollow Version Weight | Aero Version Weight |
|---|---|---|---|
| 42T | 186 mm | 57.7 g | — |
| 44T | 186 mm | 68.8 g | — |
| 46T | 193 mm | 64.4 g | 83.7 g |
| 48T | 201 mm | 76.7 g | 106.8 g |
| 50T | 209 mm | 80.3 g | 115.1 g |
| 52T | 218 mm | 87 g | 125.8 g |
| 54T | 226 mm | 98.2 g | 137.9 g |
| 56T | 242 mm | 104.7 g | 150.1 g |
| 58T | 242 mm | 109.2 g | 163.8 g |
| 60T | 250 mm | 125.7 g | 186.4 g |
Weight may vary slightly due to production tolerance.
Package Includes
- 1 × Chainring
- 5 × Chainring Bolts
Material & Manufacturing Advantages
1. Premium 7075-T651 Aluminum Alloy
This chainring is made from high-strength 7075-T651 aluminum alloy, offering excellent stiffness, strength, and durability.
The aluminum material is supplied by Aleris, a well-known USA aluminum supplier also serving aerospace manufacturers such as Airbus.
2. High-Precision CNC Machining
Each chainring is produced with high-speed CNC machining and a processing accuracy of 0.03 mm.
This ensures:
- Accurate tooth profile
- Smooth chain engagement
- Stable riding performance
- Reliable power transfer
3. Narrow-Wide Tooth Design
The narrow-wide tooth profile helps improve chain retention on 1x drivetrains and reduces the chance of chain drop during riding.
Production & Shipping Notice
Most STONE chainrings are produced after the order is placed.
Please allow 3–5 days preparation time before shipment.
Thank you for your understanding.
