Onyx Cogs HG and HGSS Stainless Steel

Product Overview

The Onyx HG and HGSS Stainless Steel Cogs are USA-made rear sprockets designed for single-speed and BMX race applications using Shimano-compatible cassette hubs. Manufactured from stainless steel with broached splines for precise fitment, these cogs provide superior wear resistance and corrosion protection compared to aluminum or standard steel cogs. Each cog is custom-made to order with exact spline tolerances for consistent engagement.

Key Features

• Stainless Steel Construction – Corrosion-resistant material provides extended service life and maintains performance in wet or muddy conditions where standard steel would rust
• Broached Spline Manufacturing – Precision broaching process creates exact spline dimensions on every cog for consistent, reliable engagement with cassette body
• Made in USA – Domestic manufacturing with quality control standards
• Shimano HG/HGSS Compatible – Fits standard Shimano cassette hubs with HG (Hyperglide) and HGSS spline patterns
• Single-Speed Optimized – Designed for 3/32" chains used in single-speed and BMX drivetrain applications

Technical Specifications

• Material: Stainless steel
• Hub Compatibility: Shimano HG and HGSS cassette
• Chain Compatibility: 3/32" (standard single-speed/BMX)
• Manufacturing: Broached splines
• Drivetrain: Single-speed
• Manufacturing Location: USA
• Available Sizes: Multiple tooth counts (specific sizes not listed)
• Weight: Not specified by manufacturer

Compatibility and Ideal Use Cases

Compatibility Requirements: Compatible with Shimano HG and HGSS cassette hubs commonly found on BMX race bikes and single-speed applications. Verify your hub uses a Shimano-compatible cassette body before purchasing—these cogs are not compatible with freewheel hubs or other cassette standards.

Important Order Information:

• Custom Made to Order – All Onyx cogs are manufactured to customer specifications after order placement
• Production Lead Time – Currently 5-7 weeks for completion
• Final Sale – All Onyx items are non-returnable; verify specifications carefully before ordering
• USA Shipping – Ships directly from Onyx manufacturer to customer
• International Orders – Ships to BRG California first, then forwards with rest of order

Ideal for BMX racing and single-speed riding in wet, muddy, or corrosive conditions where standard steel cogs would rust or aluminum cogs would wear prematurely. The stainless steel construction makes these cogs particularly suitable for riders in humid climates, coastal areas, or regions with frequent rain. The broached spline manufacturing ensures precise fitment and eliminates engagement issues caused by tolerance variations. Best suited for riders who prioritize long-term durability and corrosion resistance over initial cost and are willing to wait for custom production. The extended lead time makes these less suitable for urgent replacements or immediate builds.