Stone Chainring For Rotor 24mm Round 30T 32T 34 36 38T Direct Mount Narrow Bike Wide Chainwheel Bicycle Plate Tool 12 speed

STONE Round Oval Chainring for ROTOR 24mm Axle 3D+ 3DF Crankset Direct Mount Narrow Wide Chainwheel 30T 32T 34T 36T 38T 9/10/11/12 Speed Boost 148 Compatible

Upgrade your drivetrain with the STONE Direct Mount Round / Oval Chainring, designed for ROTOR 24mm axle cranksets, including ROTOR 3D+ and 3DF cranksets.

Made from aerospace-grade 7075-T651 aluminum supplied by Aleris USA, this chainring offers excellent stiffness, durability, and reliable power transfer. The narrow-wide tooth profile improves chain retention, reduces chain drop, and helps keep the drivetrain running smoothly in demanding riding conditions.

Available in Round and Oval options, with tooth sizes from 30T to 38T, this chainring is suitable for 9 / 10 / 11 / 12-speed drivetrains. (Not for AXS flattop chain)

Specifications

Compatibility

Crankset Compatibility

This chainring is designed for:

• For ROTOR 24mm axle cranksets
• For ROTOR 3D+
• For ROTOR 3DF

Drivetrain Compatibility

Compatible with:

• 9-speed drivetrain
• 10-speed drivetrain
• 11-speed drivetrain
• 12-speed drivetrain
• SRAM 12-speed standard chain (Not for 12s AXS flattop chain)

Frame Compatibility

• Suitable for Boost 148 frames

Important Note

Please confirm your crankset model, axle type, chainline, and required tooth size before purchase.

Narrow-Wide Tooth Design

The STONE chainring uses a newly designed wolf-tooth narrow-wide profile to improve riding stability and drivetrain performance.

Benefits

• Improves chain retention
• Reduces the risk of chain drop
• Enhances self-cleaning performance in mud and dirt
• Helps reduce drivetrain noise
• Provides smoother and more stable chain engagement

This design is especially useful for 1x drivetrain setups and off-road riding conditions.

Material and Manufacturing

7075-T651 Aerospace Aluminum

The chainring is made from high-strength 7075-T651 aluminum, supplied by Aleris USA.

This material is widely used in aerospace applications and provides an excellent balance of:

• High stiffness
• Low weight
• Strong durability
• Good fatigue resistance
• Reliable performance under high load

Precision CNC Machining

Each chainring is manufactured with high-precision CNC processing.

• Machining accuracy: 0.03mm
• Hardness: HB150
• Thickness: 9mm

This ensures accurate fitment, stable chain engagement, and consistent drivetrain performance.

Size and Weight

Package Includes

• 1 × STONE Bike Chainring or 1 × Installation / Removal Tool