STONE 123 BCD Round Chainring for Campagnolo Ekar 1×13 Gravel & Road Cranksets (38T–50T, C13 13-Speed Chain)
Upgrade your Campagnolo Ekar 1×13 drivetrain with this high-precision STONE round chainring, purpose-built for gravel and road riding.
Designed specifically for Campagnolo Ekar cranksets, this chainring is compatible only with the Campagnolo Ekar C13 13-speed chain. It is CNC-machined from high-strength 7075-T651 aluminum alloy, delivering excellent stiffness, durability, and reliable shifting performance.
Each chainring is precision-machined and finished with a durable anodized surface for long-lasting performance.
Compatibility
Please check compatibility carefully before ordering.
| Item | Specification |
|---|---|
| Crank Compatibility | Campagnolo Ekar crankset |
| Drivetrain | 1×13 speed |
| Chain Compatibility | Campagnolo Ekar C13 chain only |
| BCD | 123 BCD |
| Chainring Type | Round |
| Bolt Compatibility | Bolts not included — use original Campagnolo Ekar bolts |
Important: This chainring is designed only for Campagnolo Ekar 1×13-speed systems and the Campagnolo Ekar C13 chain.
Specifications
| Feature | Details |
|---|---|
| Brand | STONE |
| Material | High-strength aluminum 7075-T651 |
| Hardness | HB150 |
| CNC Accuracy | 0.03 mm |
| Thickness | 4 mm |
| Color | Black |
| Surface Treatment | Anodized, high-speed CNC machined |
| Speed Support | Campagnolo 13-speed |
| Package | 1 chainring only |
| Bolts Included | No |
Size & Weight Options
| Teeth | Maximum Diameter | Approx. Weight |
|---|---|---|
| 38T | 162 mm | 65 g |
| 40T | 170 mm | 70 g |
| 42T | 178 mm | 78 g |
| 44T | 186 mm | 87 g |
| 46T | 194 mm | 98 g |
| 48T | 202 mm | 109 g |
| 50T | 210 mm | 116 g |
Package Includes
- 1 × STONE 123 BCD Round Chainring
Bolts are not included. Please use the original bolts from your Campagnolo Ekar crankset.
Key Features
- Designed for Campagnolo Ekar — compatible with Campagnolo Ekar 1×13-speed cranksets.
- C13 chain compatible — made for the Campagnolo Ekar C13 chain only.
- High-strength 7075-T651 aluminum — provides excellent stiffness, strength, and durability.
- Precision CNC machining — machined with 0.03 mm accuracy for a reliable fit and consistent performance.
- Durable anodized finish — black anodized surface improves corrosion resistance and long-term appearance.
- Multiple tooth options — available from 38T to 50T for different riding styles and terrain.
