Stone 88BCD Round Bike Chainring for Shimano M985 30T 32T 36 38 40 42 44 46 48T MTB Bicycle Narrow Wide Chainwheel 88 bcd

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
• Chainline Compatibility: Supports Shimano and SRAM 12-speed chains
• 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

 

Material from USA company Aleris, it supply aluminum to aircraft make Airbus, Boeing and Bombardier as well.