Bicycle chain Shimano CN-M8100 Grey 252g

The Shimano CN-M8100 Grey is a 12-speed MTB chain engineered for smooth, reliable shifting and improved chain retention. Designed for use with Deore XT Hyperglide+ drivetrains, this chain features an extended inner plate profile that helps keep the chain engaged on the cassette under rough conditions. The SIL-TEC surface treatment reduces friction and increases wear resistance, while the supplied quick-link enables tool-free assembly and faster maintenance. Weighing approximately 252 g, the grey-finish chain balances durability and weight for off-road riding.

Advantages

The CN-M8100 delivers consistent 12-speed shifting precision through a Hyperglide+ compatible design and refined plate geometry. SIL-TEC surface treatment lowers friction for smoother operation and extended component life. An extended inner plate enhances chain retention on aggressive trails, reducing the risk of drops. The quick-link design allows for simple installation and removal without special tools, facilitating on-trail repairs and routine cleaning.

Suitable for

• 12-speed mountain bike drivetrains using Hyperglide+ compatible cassettes
• Trail and enduro riding where improved chain retention is required
• Riders seeking a low-friction, durable chain with quick-link assembly

Key specifications

• Speed compatibility: 12-speed
• Finish: grey with SIL-TEC surface treatment
• Weight: approximately 252 g
• Design feature: extended inner plate for enhanced chain retention
• Assembly: quick-link included for tool-free connection
• Compatibility: optimized for Hyperglide+ shifting systems

How to use

Install the chain by routing it through the front and rear derailleur and around the crankset and cassette, ensuring correct chain length for your drivetrain. Use the included quick-link to join the chain ends, engaging the link fully until it snaps into place; confirm secure connection by rotating the drivetrain under light load. Regularly inspect the chain for wear, contamination and proper lubrication; replace the chain when elongation or wear affects shifting performance. Follow the bicycle manufacturer's guidance for chain length and derailleur capacity when fitting to a specific bike.

Usage recommendations

For best performance, keep the chain clean and lubricated with a low-friction bicycle chain lubricant compatible with SIL-TEC treated surfaces. Check chain wear with a reliable chain-check tool and replace the chain before excessive wear causes accelerated cassette or chainring wear. When riding in muddy or wet conditions, perform more frequent cleaning and re-lubrication to preserve shifting quality and corrosion resistance.