STONE 88 BCD Narrow-Wide Chainring for Shimano M985
Upgrade your MTB drivetrain with the STONE 88 BCD narrow-wide chainring, designed for Shimano M985 cranks. Built for maximum stability and long-lasting performance, this chainring helps reduce chain drop risk on rough terrain—so every ride stays smooth and powerful.
Key Features
- Fitment: Compatible with Shimano M985 crank
- Speeds: Works with 9/10/11/12-speed drivetrains
- Bolt Package: Includes 1 × chainring + 4 bolts
- BCD: 88 BCD
- Thickness: 4mm
- Color: Black
- Surface Treatment: Anodized finish + high-speed CNC machining
Material & Strength
Made from High-strength Aluminum 7075-T651, supplied by a USA company (Aleris)—a supplier to major aircraft manufacturers including Airbus, Boeing, and Bombardier.
- Material Hardness: HB150
- Purpose: Best stiffness and endurance for aggressive MTB riding
Precision CNC Machining
This chainring is produced with high-precision CNC equipment from Taiwan and Germany.
- Machining accuracy: 0.03mm
- Result: tighter tolerances and more consistent drivetrain performance
Hollow vs. Non-Hollow Design
To balance stiffness and weight across sizes:
- 30T–34T: Non-hollow style
- 36T–48T: Hollow style
Why Choose It?
- Narrow-Wide Teeth Design: Improves chain retention for safer shifting
- Strong 7075-T651 Aluminum: Built to handle tough trails
- Clean CNC + Anodized Finish: Durable surface and great look
Package Includes
- 1 × STONE 88 BCD Chainring
- 4 × bolts
