Shimano DX Cog Chrome Plated

Product Overview

The Shimano DX (CS-MX66) is a single-speed cassette cog designed for BMX racing. Built with chrome plating for corrosion resistance and wear protection, it mounts to Shimano-compatible cassette hubs. Part of the HG400 series, this cog provides reliable engagement for race applications.

Key Features

• Chrome-plated finish – Hard chrome coating protects steel teeth from corrosion and surface wear, extending cog lifespan in wet or dirty conditions

• Shimano cassette compatibility – Spline pattern fits Shimano-compatible freehub bodies including Excess, Elevn, and other BMX race cassette hubs

• Single-speed design – Purpose-built for BMX racing where single-gear simplicity and reliability are required

• HG400 series construction – Heat-treated steel construction provides durable tooth engagement under pedaling loads

Technical Specifications

• Model: Shimano DX (CS-MX66)
• Type: Single-speed cassette cog
• Chain compatibility: 1/2" × 3/32"
• Series: CS-HG400
• Finish: Chrome plated
• Hub compatibility: Shimano-compatible cassette freehub bodies

Compatibility and Ideal Use Cases

Designed for BMX race bikes with Shimano-compatible cassette hubs. Fits freehub bodies from Excess, Elevn, Shimano, and other manufacturers using Shimano spline standards. Requires 1/2" × 3/32" BMX racing chain for proper engagement. Best suited for competitive racing where riders need reliable, affordable cog replacement for cassette-style drivetrains. Not compatible with freewheel hubs or non-Shimano cassette spline patterns—verify hub compatibility before ordering. Tooth count options available separately; select based on desired gear ratio and track conditions.