The Shimano SM-CRM85 chainring is a 34-tooth direct-mount ring designed specifically for 12-speed Deore XT cranksets such as the FC-M8100-1. It features Shimano’s Dynamic Chain Engagement+ technology, which uses a narrow-wide tooth profile to improve chain retention and pedaling efficiency in rough terrain. The ring mounts directly to the crank arm without a spider and is built with a steel tooth plate bonded to an aluminum carrier for durability and low weight.

• Tooth count: 34T

• Mount type: Shimano direct mount

• Compatibility: FC-M8100-1, M8120-1, M8130-1

• Drivetrain: 1x12-speed

• Technology: Dynamic Chain Engagement+ for improved chain retention

• Materials: Steel teeth with aluminum carrier

• Chainline: Boost (52 mm) or Super Boost (56.5 mm), depending on offset version

• Intended use: Cross-country, trail, and all-mountain riding