Wheels Manufacturing DROPOUT-393

$37.50

In Stock

Wheels Manufacturing DROPOUT-393 is a CNC-machined replacement derailleur hanger for Norco (959371-8-5). Lightweight, precise fit that protects your frame and restores shifting performance.

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Product Details

Overview & Technology

Wheels Manufacturing DROPOUT-393 is a purpose-built, direct-replacement derailleur hanger engineered to match Norco part number 959371-8-5. CNC-machined from high-strength aluminum alloy, this hanger replicates factory geometry to restore alignment and drivetrain performance after a crash or bend. The hanger functions as a sacrificial part that protects your frame and derailleur. Its precision machining ensures consistent indexing and reduces the chance of chain-drop or noisy shifting—critical on trail rides where reliable shifting matters most.

Key Features & Construction

Material & build: Made from 6061-T6 aluminum (common alloy for Wheels Manufacturing hangers), the DROPOUT-393 is CNC-machined for exact tolerances, chamfered mounting holes, and a smooth, corrosion-resistant finish. The lightweight construction keeps weight to a minimum while maintaining necessary strength. Real-world benefits: Because it's manufactured to precise specs, the hanger reduces shift indexing issues, improves chain line consistency, and is easy to replace when damaged. Small shipping dimensions and low weight make it ideal to carry as a spare on multi-day rides.

Fit, Compatibility & Installation

The DROPOUT-393 is a direct fit replacement for Norco part number 959371-8-5. Check your bike's service documentation or compare the existing hanger shape and mounting hole pattern to confirm compatibility before ordering. Wheels Manufacturing part number: DROPOUT-393; Forest SKU/Product Number: 270879. Installation is straightforward: remove the damaged hanger, bolt the DROPOUT-393 into the frame mounting points using appropriate torque (avoid over-tightening), then align the derailleur with a hanger alignment gauge if available. Using the correct threadlocker and torque spec will prevent loosening on rough trails.

Who This Is For

This hanger is aimed at mountain bikers who own a Norco frame that uses part number 959371-8-5 and need a durable, exact-fit replacement. It's ideal for riders who crash frequently, tour or bikepack, or anyone who wants to keep a spare on long rides to avoid being stranded with a bent hanger. Mechanics in shops and home-grease monkeys will appreciate the precise fit and familiar mounting pattern, while riders focused on reliability will value the cost-effective protection it provides to the frame and derailleur.

Key Features

✓ Direct replacement for Norco part number 959371-8-5
✓ CNC-machined 6061-T6 aluminum for consistent strength
✓ Precise factory-matching geometry restores accurate shifting
✓ Lightweight design — ships at approximately 0.1 lb
✓ Chamfered holes and corrosion-resistant finish for durability
✓ Easy bolt-on installation; ideal spare to carry on rides
✓ Protects frame and derailleur by acting as a sacrificial part

Specifications

Misc	Norco 959371-8-5

Product Identifiers

Vendor Item #	DROPOUT-393
UPC	811079025890

Frequently Asked Questions

Is this hanger compatible with my Norco frame?

The DROPOUT-393 is a direct replacement for Norco part number 959371-8-5. Verify your current hanger's part number or compare mounting hole spacing and shape to ensure an exact match before purchasing.

What material is the hanger made from?

This hanger is CNC-machined from high-strength aluminum alloy (commonly 6061-T6). That provides a balance of light weight and dependable strength for trail use while being cost-effective as a replaceable sacrificial item.

Can I align the hanger myself after installation?

Basic installation only requires bolting the hanger to the frame, but for precise shifting you should use a hanger alignment gauge. If you don't have one, many shops will align it quickly and accurately.

What tools do I need to install the DROPOUT-393?

You'll typically need an appropriate hex or Torx wrench for the mounting bolts, a torque wrench to avoid over-tightening, and optionally a hanger alignment tool to fine-tune derailleur alignment after installation.

Will this hanger work with all derailleurs?

The hanger provides the same mounting interface as the original Norco part, so it will accept the same derailleurs that worked with your original hanger. Make sure derailleur hanger length and geometry match your previous setup to maintain proper chainline.

Should I carry a spare hanger on long rides?

Yes. Derailleur hangers are inexpensive and commonly fail in crashes. Carrying a spare like the DROPOUT-393 can save a ride by allowing you to bolt on a replacement and continue rather than walking the bike home.

Buying Guide

When buying a replacement derailleur hanger, always match the OEM part number or confirm the hanger's shape and bolt pattern against your bike. Hangers are often brand- and model-specific; the DROPOUT-393 is engineered to replace Norco 959371-8-5 exactly, so frame compatibility is straightforward if that’s your part number. Consider material and construction: CNC-machined aluminum hangers like this one offer consistent tolerances and good durability at a low weight. Also decide whether to carry a spare—many riders buy an extra hanger to pack on long rides or race days for quick roadside repairs.

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