The STONE 145BCD narrow-wide chainring is designed for Campagnolo Chorus, Record, and Super Record 11-speed cranksets.
Available in both round and oval shapes, this chainring is made for 1x drivetrain conversion and provides strong chain retention, smooth power transfer, and reliable riding performance.
Made from high-strength 7075-T651 aluminum alloy, it is CNC-machined with high precision and finished with anodizing for durability.
Product Specifications
| Item | Specification |
|---|---|
| Product Name | STONE 145BCD Round Narrow Wide Chainring |
| BCD | 145BCD |
| Shape Options | 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 | Black |
| Drivetrain Type | 1x drivetrain only |
| Compatible Crankset | For Campagnolo Chorus / Record / Super Record 11s |
Key Features
- 145BCD chainring for Campagnolo 11s cranksets
- Available in round and oval versions
- Designed for 1x drivetrain only
- Narrow-wide tooth profile for better chain retention
- Made from 7075-T651 high-strength aluminum alloy
- CNC-machined with 0.03 mm precision
- Anodized surface finish
- Compatible with most 9 / 10 / 11 / 12-speed chains(Not for AXS flattop chain）
- Includes 4 chainring bolts
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.
Compatible Cranksets
This chainring fits the following Campagnolo 11-speed cranksets:
- for Campagnolo Chorus 11s
- for Campagnolo Record 11s
- for Campagnolo Super Record 11s
Please confirm your crankset is 145BCD before ordering.
Chain Compatibility
| Chain Type | Compatibility |
|---|---|
| MTB 9 / 10 / 11 / 12-speed chains | Compatible |
| SRAM road 9 / 10 / 11-speed chains | Compatible |
| Shimano road 9 / 10 / 11 / 12-speed chains | Compatible |
| SRAM AXS 12-speed Flattop chain | Not compatible |
SRAM AXS Flattop Chain Notice
The standard version does not support SRAM AXS 12-speed Flattop chains.
If you need compatibility with SRAM AXS 12-speed Flattop chains, please contact us before ordering.
Round Chainring Size & Weight
| Shape | Teeth | Max Diameter | Weight |
|---|---|---|---|
| BCD145 Round | 44T | 186 mm | 74 g |
| BCD145 Round | 46T | 194 mm | 87 g |
| BCD145 Round | 48T | 202 mm | 96 g |
| BCD145 Round | 50T | 210 mm | 105 g |
| BCD145 Round | 52T | 219 mm | 114 g |
| BCD145 Round | 54T | 226 mm | 124 g |
| BCD145 Round | 56T | 235 mm | 133 g |
| BCD145 Round | 58T | 242 mm | 144 g |
| BCD145 Round | 60T | 250 mm | 155 g |
Package Includes
- 1 × Chainring
- 4 × 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, durability, and riding performance.
The aluminum material is supplied by Aleris, a USA aluminum supplier also serving aerospace manufacturers such as Airbus.
2. High-Precision CNC Machining
Each chainring is produced by high-speed CNC machining with 0.03 mm processing precision.
This helps ensure:
- Accurate tooth profile
- Smooth chain engagement
- Stable drivetrain performance
- Reliable power transfer
3. Narrow-Wide Tooth Design
The narrow-wide tooth profile is designed for 1x drivetrain systems.
It helps improve chain retention and reduces the chance of chain drop during riding.
Production Time 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.
