Wheels Manufacturing Dropout 99
Dropout 99
Dropout 99
Wheels Manufacturing

Wheels Manufacturing Dropout 99

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The Wheels Manufacturing Dropout 99 is a CNC replacement derailleur hanger engineered to fit KHS, Marin, Electra/Novara and Grineaux frames. Lightweight, precise and easy to swap for fast repairs and reliable shifting.

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Product Details

Overview & Technology

Dropout 99 is a purpose-built derailleur hanger from Wheels Manufacturing designed as a direct replacement for specific KHS, Marin, Electra/Novara and Grineaux frames. Manufactured to tight tolerances, this hanger restores frame-to-derailleur alignment after damage or wear so your drivetrain shifts cleanly and reliably. Constructed from CNC-machined aluminium alloy with a corrosion-resistant finish, the Dropout 99 balances stiffness and controlled deformation. The precision machining guarantees consistent mounting geometry so the derailleur pivot sits where the factory intended—reducing index shifting problems and limiting chain suck and dropped gears in real-world riding.

Key Features & Benefits

CNC-machined construction: The hanger is milled from high-quality aluminium alloy for predictable strength and repeatable alignment. This means the hanger resists twisting under load but will still act as a sacrificial part in a crash to protect your frame and derailleur. Quick, reliable replacement: Sized and drilled to match OEM attachment points so installation is straightforward — remove the old hanger, bolt the Dropout 99 on, and re-mount your derailleur. The small shipping size and ultra-light weight make it ideal to carry as a spare on long rides or trips.

Fit, Compatibility & Specs

The Dropout 99 is listed as part #DROPOUT-99 and corresponds to Wheels Manufacturing's #99 fitment. It's specifically compatible with select frames from KHS, Marin, Electra/Novara and Grineaux. Check your bike's hanger shape and screw hole spacing against the Dropout 99 template before purchase. Shipping dimensions: 3" x 3" x 0.4" and weighs 0.01 lb — a compact, lightweight replacement. As with most aftermarket hangers, confirm the orientation and bolt thread size on your frame; if your bike used a removable hanger plate or different fasteners, you may need the matching hardware.

Who This Hanger Is For

If you ride a Marin, KHS, Electra/Novara or Grineaux bike and need a reliable replacement for a bent or broken derailleur hanger, the Dropout 99 is a compact, affordable fix. It's aimed at riders who want OEM-like fitment without delay — from daily commuters and light trail riders to weekend mountain bikers who carry a spare for peace of mind. Mechanics and home wrenchers will appreciate the precise machining and repeatable alignment; bike shops benefit from stocking a proven Wheels Manufacturing part that covers several popular frame lines.

Key Features

  • ✓ CNC-machined aluminium alloy for precise, repeatable derailleur alignment
  • ✓ Direct replacement for KHS, Marin, Electra/Novara and Grineaux frames
  • ✓ Sacrificial design protects frame and derailleur in impacts
  • ✓ Compact, lightweight spare — easy to carry on rides
  • ✓ Finish resists corrosion for long-term reliability outdoors
  • ✓ Simple bolt-on installation mirrors OEM mounting points
  • ✓ Part number DROPOUT-99 for quick identification and ordering

Specifications

Misc #99, Electra, Grineaux, KHS, Marin, Novara

Product Identifiers

Vendor Item # DROPOUT-99
UPC 836572006207

Frequently Asked Questions

How do I know if Dropout 99 fits my bike?

Compare the hole spacing and hanger shape on your frame to the Dropout 99 profile. This model is listed for select KHS, Marin, Electra/Novara and Grineaux frames; if in doubt, measure the mounting bolt centers or bring the old hanger to your shop for verification.

Can I straighten a bent hanger instead of replacing it?

Minor bends can sometimes be straightened for short-term use, but a repaired hanger rarely returns to perfect alignment. We recommend replacement (like the Dropout 99) for reliable, long-term shifting—especially after a crash or significant impact.

What hardware do I need to install this hanger?

Most frames use the existing hanger bolt(s) and the OEM hardware will work with the Dropout 99. If the original screws are damaged or missing, use the correct diameter and thread-length fasteners recommended by your frame manufacturer or a bike shop.

Is this hanger made from aluminium or steel?

The Dropout 99 is CNC-machined from a high-strength aluminium alloy. Aluminium provides a light, stiff mounting surface and is designed to act as a sacrificial part to protect more expensive components in a crash.

Can I carry this hanger as a spare on rides?

Yes — the Dropout 99 is extremely lightweight and compact (shipping size 3" x 3" x 0.4", weight ~0.01 lb), making it a practical spare for bikepacking trips or long rides where access to parts is limited.

Does Wheels Manufacturing offer a warranty on this hanger?

Wheels Manufacturing provides high-quality components, but warranty terms vary. Save your purchase receipt and check Wheels Mfg's warranty policy or contact Forest Bikes support if you encounter material or manufacturing defects.

Buying Guide

When buying a derailleur hanger, accuracy matters more than brand loyalty. Choose a hanger that matches your frame's mounting pattern and bolt spacing exactly—templates or comparing the old hanger side-by-side are the fastest checks. Prefer CNC-machined aluminium hangers like the Dropout 99 for consistent geometry and predictable sacrificial behavior in impacts. Also think about practicality: carry a spare on multi-day rides, check bolt condition during installation, and keep replacement hardware handy. If you’re unsure, bring the wheel and old hanger to your local shop or send photos to Forest Bikes for fit confirmation.

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