Wheels Manufacturing DROPOUT-359
DROPOUT-359
Wheels Manufacturing

Wheels Manufacturing DROPOUT-359

$37.50
In Stock

Precision CNC-machined 6061 aluminum derailleur hanger that replaces Norco #959371-8-7. Black anodized finish for corrosion resistance and a direct one-screw fit.

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Product Details

Overview & Technology

DROPOUT-359 from Wheels Manufacturing is a precision replacement derailleur hanger engineered from CNC-machined 6061-T6 aluminum. The hanger is finished in a hard black anodize that improves abrasion and corrosion resistance while maintaining tight manufacturing tolerances for consistent shifting. Design and function: this hanger is produced to be a direct swap for the Norco OEM piece (Norco #959371-8-7) and secures to the frame with a single M3x8 flat-head screw (fastener not included). The CNC process ensures exact hole spacing and alignment so the derailleur boss sits true to the axle — crucial for reliable indexing and chain retention on mountain terrain.

Key Features & Real-World Benefits

Material and finish: constructed from 6061 aluminum for an excellent strength-to-weight ratio and anodized black to resist corrosion from mud, salt and trail grime. The light 0.1 lb mass keeps unsprung weight low and preserves bike handling. Performance advantages: a precision hanger means fewer adjustment surprises when you replace a bent or stripped hanger. Installing a correctly-machined replacement restores derailleur alignment, reduces chain rub, improves shifting crispness and protects the frame's dropout area from damage in crashes.

Fit, Installation & Compatibility

This part is a direct replacement for Norco frames that use OEM part #959371-8-7 and ships as Wheels Manufacturing part DROPOUT-359 (Product #270944). It attaches to the frame with a single M3x8 flat-head screw; note that the fastener is not included so you'll need an M3x8 stainless or alloy screw and the matching thread engagement on your frame. Installation is straightforward for home mechanics: remove the bent or stripped hanger, clean the mounting threads, fit the replacement and torque the M3 screw to the frame manufacturer's specified torque (usually low — avoid over-tightening). After mounting, check derailleur alignment with a hanger alignment gauge or visually verify smooth indexed shifting across the cassette.

Who This Hanger Is For

The DROPOUT-359 is ideal for mountain riders who own Norco bikes that use the replaced OEM hanger — riders who value a reliable, lightweight replacement that restores precise shifting after damage. It's an excellent spare to carry on long rides or keep in your toolbox for quick roadside repairs. Mechanically inclined cyclists, trail techs and shop mechanics will appreciate the CNC accuracy and durable anodized finish that combine to make a dependable, long-lasting hanger suitable for aggressive off-road use.

Key Features

  • ✓ CNC-machined 6061-T6 aluminum for precise, durable construction
  • ✓ Black hard-anodized finish resists corrosion and trail wear
  • ✓ Direct replacement for Norco OEM part #959371-8-7
  • ✓ Secures with one M3x8 flat-head screw (fastener not included)
  • ✓ Lightweight design (~0.1 lb) preserves bike handling
  • ✓ Restores derailleur alignment for crisp indexed shifting
  • ✓ Ideal spare for trail repairs and shop service use

Specifications

Misc Norco

Product Identifiers

Vendor Item # DROPOUT-359
UPC 811079025388

Frequently Asked Questions

Will this hanger fit my Norco frame?

DROPOUT-359 is made as a direct replacement for Norco OEM part #959371-8-7. Confirm your frame's existing hanger part number or compare mounting hole spacing and the single M3 mounting screw before purchase.

Does the screw come with the hanger?

No — the hanger ships without the M3x8 flat-head screw. Use an M3x8 stainless or alloy screw with appropriate thread engagement and follow your frame manufacturer's torque specs to avoid damage.

Can a bent hanger be straightened instead of replaced?

Minor bends can sometimes be realigned with a proper hanger alignment tool, but once the hanger is fatigued, stripped or cracked replacement is safer. Because DROPOUT-359 is inexpensive and CNC-accurate, replacement is often the best long-term solution.

What tools are required to install this hanger?

You’ll typically need a small flat-head or Torx screwdriver (depending on your chosen screw head), a torque driver for final tightening, and a hanger alignment gauge to check derailleur geometry after installation.

Is this hanger durable for mountain bike use?

Yes — machined 6061-T6 aluminum with a black anodized finish provides a good balance of strength and light weight for mountain riding. Hangers are sacrificial parts designed to protect the frame and drivetrain in a crash; replace if damaged.

What should I check after installing the new hanger?

After installation, verify that the derailleur is parallel to the cassette and shifts cleanly across gears. Use an alignment tool if available and re-check bolt torque after a short ride.

Buying Guide

When selecting a replacement derailleur hanger, prioritize fit and manufacturing accuracy over price. A CNC-machined 6061 hanger like DROPOUT-359 offers repeatable hole spacing and a true mounting surface that preserves indexing. Confirm the OEM part number or measure mounting points to ensure compatibility. Also consider whether your hanger uses a single-screw mount and whether the frame requires a specific screw head type. Keep a spare hanger in your toolkit — they are a small investment that can save a ride when trail crashes bend the original.

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