Kmc K1 Wide 1/8" Chain

KMC K1 Wide 1/8" Chain

Product Overview

The KMC K1 is a heavy-duty wide 1/8" chain designed for single-speed and fixed-gear BMX drivetrains with special small sprockets. At 112 links with anti-drop design and mushroomed riveting, it provides robust performance and security for high-tension single-speed applications.

Key Features

• Wide 1/8" Profile – Standard single-speed chain width compatible with BMX cogs and chainrings
• Heavy-Duty Structure – Reinforced construction resists wear and stretching under high single-speed tension
• Anti-Drop Design – Specialized geometry prevents chain from dropping off sprockets during aggressive tricks and racing
• Mushroomed Riveting – High-quality rivet construction provides superior strength and durability
• Inner Plate Chamfering – Precision-cut inner plates reduce friction and improve chain fluidity
• Special Dynamic K Configuration – Proprietary KMC plate geometry optimizes chain strength and flexibility
• 112 Links – Extended length accommodates various frame geometries common in BMX
• Small Sprocket Compatible – Engineered for tight chainring and cog combinations typical of BMX setups
• Single-Speed Optimized – Purpose-built for high-tension single-speed and fixed-gear performance
• Professional Racing Component – Durable construction suitable for competitive BMX racing and freestyle

Technical Specifications

• Chain size: Wide 1/8"
• Chain type: Classic links
• Pitch: 1/2" x 1/8"
• Link count: 112 links
• Material: Heavy-duty steel
• Rivet type: Mushroomed riveting
• Inner plates: Chamfered
• Special features: Anti-drop design, dynamic K configuration
• Application: Single-speed and fixed-gear BMX drivetrains

Compatibility & Ideal Use Cases

• Single-Speed BMX – Optimized for BMX racing and freestyle single-speed setups
• Fixed-Gear Drivetrains – High-tension construction suitable for fixed-gear performance
• Small Sprocket Systems – Engineered for compact cog and chainring combinations
• Anti-Drop Security – Prevents chain loss during tricks, racing, and aggressive riding
• Racing Applications – Heavy-duty structure resists breaking under high-tension racing loads
• Freestyle Tricks – Anti-drop design maintains chain security during flip tricks and manuals
• BMX Racing – Mushroomed riveting and dynamic K configuration optimized for racing performance
• All Rider Types – Suitable for beginners through professional BMX racers

Build Requirements & Compatibility

• 1/8" Chainring and Cog – Compatible with standard single-speed BMX chainrings and cogs
• Chain Length Adjustment – 112 links; remove full links as needed for precise fit to your drivetrain
• Chain Tensioner System – Works with standard BMX chain tensioners for proper alignment
• Spoke Guard Clearance – Verify adequate clearance between chain and rear wheel spokes
• Proper Tensioning – Maintain appropriate chain tension using chain tensioners; inspect periodically for wear

Important Notes

• Anti-drop design critical for BMX safety; prevents chain loss during tricks and racing
• Heavy-duty construction resists stretching under single-speed tension demands
• 112 links provide extended length; adjust via full-link removal based on your frame geometry
• Mushroomed riveting delivers superior durability compared to standard rivets
• Dynamic K configuration proprietary KMC geometry optimizes strength without excess weight
• Wide 1/8" profile standard for single-speed BMX; not suitable for multi-speed drivetrains
• Inner plate chamfering reduces friction and improves chain fluidity during operation
• Professional-grade component suitable for competitive racing and trick riding
• Periodic inspection recommended to monitor chain wear and tension consistency
• Not interchangeable with narrow 3/32" chains; verify width before ordering

Inner plate chamferring Mushrommed riveting Anti drop design

Heavy Duty Structure Special dynamic K configuration