STONE Aero 1x chainring for Cybrei Easton Cinch

Stone Aero Direct Mount Chainring (Easton Cinch / Cybrei Standard)

Engineered to optimize aerodynamics and eliminate drivetrain friction, this solid CNC-machined chainring mounts directly onto the Easton Cinch interface and Cybrei carbon crankarms. Available in a full range from 38 to 58 teeth, it covers every riding discipline: agile gearing for gravel (38T–44T), smooth rolling on the road (46T–50T), or maximum power transfer for time trial and track racing (52T–58T). Its 0.03 mm machining precision and Narrow-Wide tooth profile lock the chain in place without an external chain guide.

Key Features

7075-T651 Aluminum: Machined from aircraft-grade alloy (Aleris) ensuring total lateral stiffness under heavy pedaling loads and increased wear resistance.

38T to 58T Tooth Range: A comprehensive selection of sizes to precisely tune your gear ratios to your discipline, from aggressive gravel to time trials.

Narrow-Wide Profile: Self-cleaning alternating narrow/wide teeth to hold the chain securely and reduce mechanical friction noise.

Easton Cinch & Cybrei Interface: Direct mount with zero play on Easton EC90SL and Cybrei carbon cranks, featuring a 46 mm chainline (3.5 mm offset).

Compatibility

Compatible with Easton EC90SL cranksets and Cybrei carbon crankarms featuring the Cinch standard. Works with 9, 10, 11, and 12-speed MTB chains, as well as 9 to 12-speed Shimano road chains and 9 to 11-speed SRAM road chains. This chainring is not compatible with SRAM AXS 12-speed and 13-speed Flattop flat-backed chains.

Apply neutral grease to the Cinch interface splines and torque to the spec recommended by your crank manufacturer. Have a question about tooth count or chain compatibility? Write to us.

Technical Specifications