Wheels Manufacturing Dropout 189
Wheels Manufacturing Dropout 189 is the direct-replacement derailleur hanger for Norco frames that use #189. Precision CNC construction and lightweight design make it an ideal on-bike spare or workshop part.
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Overview & Technology
Key Features
Fit & Compatibility
Who It's For
Key Features
- ✓ Direct-replacement derailleur hanger for Norco frames requiring #189
- ✓ Precision CNC-machined aluminum for consistent alignment and strength
- ✓ Lightweight — approximately 0.03 lb shipping weight, easy to carry
- ✓ Corrosion-resistant finish to withstand wet and muddy trail conditions
- ✓ Protects frame by acting as a sacrificial, replaceable component
- ✓ Sold individually—ideal spare for trail repairs and workshop inventories
- ✓ Compact shipping size (3" x 3" x 0.4") fits in tool rolls and packs
Specifications
Product Identifiers
Frequently Asked Questions
How do I know if Dropout 189 fits my Norco frame?
Check your frame documentation or the stamping on the existing hanger—Norco often identifies hangers by number. If your current hanger is marked #189 or your parts list shows hanger 189, this Dropout 189 is the correct replacement. When in doubt, compare photos or consult Forest Bikes with your frame model and year.
Is the hanger sold with the mounting bolt?
This listing is for the Dropout 189 hanger itself. Mounting hardware policies can vary by frame and year; many frames reuse the original bolt. If you don't have the bolt or prefer a fresh fastener, purchase a compatible stainless steel derailleur hanger bolt from Wheels Manufacturing or your local bike shop.
Can I bend this hanger back into shape or should I replace it?
Minor alignment tweaks can sometimes be corrected using a derailleur hanger alignment tool, but once a hanger is visibly bent, cracked, or repeatedly failing after alignment, replacement is the safer choice. This Dropout 189 is inexpensive and designed to be a sacrificial part that prevents more expensive damage to your frame or derailleur.
How difficult is installation?
Installation is straightforward for most home mechanics: remove the rear derailleur, unbolt the old hanger, mount the Dropout 189, reinstall the derailleur, and index gears. Use correct torque settings and verify hanger alignment with an alignment tool for best shifting performance. If you're unsure, a local shop can install and check alignment quickly.
What material and finish is this hanger made from?
Wheels Manufacturing hangers are typically precision machined from high-strength aluminum alloy with a protective finish to resist corrosion and wear. That combination delivers a light, stiff part that maintains derailleur geometry under load while offering sacrificial protection during impacts.
Should I carry a spare hanger on rides?
Yes—carrying a spare hanger like Dropout 189 is highly recommended for mountain riders, especially on remote or technical rides. A small hanger takes little room or weight in a pack and can get you home or to the nearest shop after a hangar-impact that would otherwise leave you stranded.
Buying Guide
When buying a replacement derailleur hanger, prioritize correct fit and material quality. Match the hanger number to your frame (here, Norco #189) and choose a stable, precision-made part—aluminum CNC hangers are common because they balance strength, weight, and predictable failure characteristics. Also consider whether you need mounting hardware, and if you plan to reinstall the hanger yourself, pick up or rent a derailleur hanger alignment tool. Keeping a spare hanger in your toolkit or pack prevents a crash from ending your ride early.
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