Wheels Manufacturing Dropout 187
Wheels Manufacturing

Wheels Manufacturing Dropout 187

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Direct-fit Wheels Manufacturing Dropout 187 replacement derailleur hanger for Norco frames. CNC-machined aluminum, OEM-spec fit, lightweight and easy to replace.

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Product Details

Overview & Technology

Wheels Manufacturing Dropout 187 (DROPOUT-187, PN 270452) is a precision replacement derailleur hanger made to match Norco's #187 mounting pattern. CNC-machined from high-strength aluminum and finished for corrosion resistance, this hanger restores derailleur alignment after a crash or wear and protects your frame by acting as a sacrificial, serviceable part. Technical highlights: the Dropout 187 is cut to OEM dimensions for bolt and dropout spacing, keeping derailleur position accurate for crisp shifts. Its lightweight design keeps unsprung weight minimal while the hard-anodized surface reduces corrosion and scuffing in real-world trail conditions.

Key Features & Benefits

Precision fit and shifting performance. The CNC-machined profile gives repeatable, true alignment so your derailleur tracks as intended—this translates to quieter, more reliable shifting across the cassette. • Material: 6061-T6 aluminum (CNC) with hard-anodized finish for durability. • Fit: OEM-style #187 pattern tailored for Norco frames. • Weight: Extremely light—adds negligible mass while restoring function. • Serviceability: Sacrificial part design prevents expensive frame damage; easy to swap roadside or at the shop.

Fit, Compatibility & Installation

The Dropout 187 is made specifically for Norco bikes that use the #187 hanger pattern. Before ordering, compare your current hanger's silhouette and bolt locations or consult your Norco owner's manual to confirm a match. Wheels Manufacturing lists compatibility by hanger number so #187 is the reliable identifier. Installation is straightforward for any home mechanic: remove the old hanger, fit the new Dropout 187 into the dropout, and secure with the original hanger bolt (or the correct OEM bolt). Typical tools: 5mm or 6mm hex wrench depending on your bike’s hardware; torque to the frame manufacturer's spec. Note: this listing is for the hanger itself (DROPOUT-187 / PN 270452); verify whether your bike requires a specific bolt length or washer.

Who This Hanger Is For

This hanger is essential for Norco riders who want an exact, durable replacement after a crash or when swapping derailleurs. Mountain bikers who ride agressively, frequent rocky trails, or who travel with their bikes will appreciate having a spare Dropout 187 on hand to avoid frame damage and get back on the trail quickly. Mechanics and bike shops also favor Wheels Manufacturing hangers for their precise tolerances and consistent fit—making the Dropout 187 a trusted, long-term service part for Norco-compatible builds and repairs.

Key Features

  • ✓ Direct-fit replacement for Norco frames using the #187 hanger pattern
  • ✓ CNC-machined 6061-T6 aluminum for strength with low weight
  • ✓ Hard-anodized finish resists corrosion and scuffs on the trail
  • ✓ Precision OEM dimensions restore accurate derailleur alignment
  • ✓ Lightweight sacrificial part to protect expensive frame dropouts
  • ✓ Easy field or shop replacement — quick swap gets you riding

Specifications

Misc #187, Norco

Product Identifiers

Vendor Item # DROPOUT-187
UPC 811079020802

Frequently Asked Questions

How do I know this hanger fits my Norco frame?

Check your current hanger for the #187 identifier or compare the bolt hole spacing and silhouette to product pictures. Wheels Manufacturing uses hanger numbers to match OEM patterns—if your Norco lists #187, this Dropout 187 is the correct replacement.

Does the Dropout 187 include the mounting bolt or hardware?

This listing is for the derailleur hanger (DROPOUT-187 / PN 270452) itself. Many bikes reuse the original hanger bolt; if you don’t have the bolt or need a specific length, purchase a replacement M5 hanger bolt separately or consult your Norco manual.

Can I install this hanger at home or should a shop do it?

Most mechanically confident riders can install the hanger with common tools (hex keys/torque wrench). Tighten to your frame manufacturer's torque spec and check derailleur alignment after fitting. If the dropout or threads look damaged, have a pro inspect before installation.

What if my hanger bends again after replacement?

If hangers bend repeatedly, inspect for drivetrain misalignment, chain length issues, or repeated impacts. The hanger is a sacrificial part designed to bend or break to protect the frame; frequent failure may indicate a larger issue that a mechanic can diagnose.

Is this hanger compatible with direct-mount derailleurs or only standard bolt-on types?

The Dropout 187 matches the Norco #187 hanger geometry and accommodates standard bolt-on derailleurs that rely on the frame-mounted hanger. For proprietary direct-mount systems, confirm compatibility by comparing mounting points.

What are the part numbers I should reference when ordering?

Use Wheels Manufacturing part DROPOUT-187 and manufacturer/product number PN 270452. Also reference Norco #187 when matching to your bike.

Buying Guide

When buying a derailleur hanger, match the hanger number and mounting pattern to your frame instead of guessing by bike model alone. Wheels Manufacturing's numbered system (like #187) makes it easy to find an exact replacement—compare shapes and bolt locations or consult your bike's manual. Prioritize materials (CNC 6061-T6 is common and reliable), finish (hard-anodizing for corrosion resistance), and whether the hanger is sold with hardware. Keep a spare on long rides; a hanger swap is the fastest way to fix shifting after an impact and avoid costly frame damage.

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