Kmc X9 11/128" Chain

KMC X9 11/128" Chain

Product Overview

The KMC X9 is a lightweight narrow 11/128" 9-speed chain compatible with Shimano, Campagnolo, and SRAM drivetrains. At 288g with 96 links, it features full nickel plating, stretch-proof treatment, chamfered plates, and includes a missing link for tool-free installation.

Key Features

• Lightweight Construction - 288g weight reduces rotational mass compared to wider chain profiles
• Full Nickel Plating - Protective coating resists corrosion and extends chain lifespan in varied weather conditions
• Stretch-Proof Treatment - Advanced material treatment resists elongation under load; maintains consistent chain tension
• 11/128" Narrow Profile - Ultra-narrow width optimized for 9-speed cassette spacing and precise shifting
• Fast Transmission - Optimized plate geometry facilitates quick, smooth gear changes across the cassette
• Chamfered Inner Plates - Precision-cut inner plates reduce friction and improve shifting performance
• Chamfered Outer Plates - Beveled outer plates enhance strength and reduce weight without sacrificing durability
• Resistant Riveting - High-quality rivet construction withstands high tension and repeated shifting cycles
• 96 Links - Standard chain length suitable for most frame geometries
• Missing Link Included - Quick-release master link enables tool-free chain installation and removal
• 9-Speed Compatibility - Works exclusively with 9-speed Shimano, Campagnolo, and SRAM cassettes
• Professional Construction - High-quality materials and manufacturing ensure durability and performance

Technical Specifications

• Chain size: Narrow 11/128"
• Chain type: Classic links
• Pitch: 1/2" x 11/128"
• Link count: 96 links
• Pin length: 6.6mm
• Weight: 288g
• Material: Steel with full nickel plating
• Treatment: Stretch-proof
• Rivet type: Resistant riveting
• Inner plates: Chamfered
• Outer plates: Chamfered
• Master link: Missing link included
• Speed compatibility: 9-speed only

Compatibility & Ideal Use Cases

• 9-Speed Drivetrains - Compatible exclusively with 9-speed Shimano, Campagnolo, and SRAM systems
• Shimano 9-Speed Cassettes - Works with standard Shimano 9-speed sprocket systems
• Campagnolo 9-Speed - Compatible with Campagnolo 9-speed drivetrain components
• SRAM 9-Speed - Works with SRAM 9-speed cassettes and shifters
• Racing and training - Durable construction suitable for competitive and casual riding
• Weight-optimized builds - 288g lightweight ideal for racing-focused setups
• Variable terrain - Nickel plating resists corrosion in wet, muddy, or salty conditions
• Precise shifting - 11/128" narrow profile optimized for fast, accurate gear changes
• Multi-speed performance - Suitable for road, gravel, or BMX multi-speed conversions with 9-speed capability

Build Requirements & Compatibility

• 9-Speed Cassette Only - Must be compatible 9-speed Shimano, Campagnolo, or SRAM system; not backward-compatible with 8-speed
• 9-Speed Derailleur System - Requires matching front and rear derailleurs tuned for 9-speed spacing
• Chain Length - 96 links standard; adjust if needed based on frame geometry and largest/smallest gear combination
• Missing Link Installation - Use included master link for tool-free installation and removal
• Proper Tensioning - Maintain appropriate chain tension; inspect periodically for wear

Important Notes

• Designed exclusively for 9-speed systems; not compatible with 8-speed or 10+ speed drivetrains
• 11/128" width is narrower than 3/32" (8-speed); not interchangeable with wider chains
• Full nickel plating protects against corrosion; ideal for varied weather and terrain
• Stretch-proof treatment maintains consistent tension through extended use
• Chamfered inner and outer plates improve shifting smoothness and reduce friction
• Missing link included; enables quick chain installation without special tools
• Pin length 6.6mm standard for 11/128" chains; compatible with 9-speed chainrings and cassettes
• Weight 288g lightweight for 9-speed chain specification; ideal for racing and performance builds
• Not backward-compatible with 8-speed systems
• Periodic inspection recommended to monitor chain wear and elongation
• Replace if chain stretch exceeds manufacturer specifications to prevent drivetrain damage