Stone 145BCD Chainring Oval Round for Campagnolo 11s CP Crankset 9-12 speed Record

Stone 145BCD Chainring Round Oval for Campagnolo 11s CP Crankset 9 10 11 12 speed

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

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

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

Oval Chainring Size & Weight

Weight may vary slightly due to manufacturing tolerance.

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.