Wheels Manufacturing Dropout 38
Dropout 38
Dropout 38
Wheels Manufacturing

Wheels Manufacturing Dropout 38

In Stock

Wheels Manufacturing Dropout 38 is a CNC-machined replacement derailleur hanger that fits multiple frame makers (Bianchi, Diamondback, Haro, Jamis, Kona, Trek). Durable, direct-fit design for fast repairs and exact alignment.

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Product Details

Overview & Technology

Wheels Manufacturing Dropout 38 (Manufacturer Part #: DROPOUT-38, SKU: 270404) is a precision replacement derailleur hanger engineered as a direct-fit, serviceable dropout for a range of popular frames. CNC-machined from high-strength aluminum, this hanger restores derailleur alignment after impacts and prevents frame damage by acting as a sacrificial part. The hanger's construction balances stiffness with controlled failure: strong enough to keep shifting precise under load, but designed to bend or shear before the frame or derailleur is catastrophically damaged. The part ships compact (3" x 3" x 0.3") and lightweight (0.05 lb), making it a great item to carry as a spare on rides or keep in your garage toolkit.

Key Features & Benefits

Material & finish: CNC-machined from 6061-T6 aluminum with a corrosion-resistant anodized finish to resist the elements and road grime while maintaining tight tolerances for consistent shifting. • Direct replacement for multiple makers — eliminates the need for custom fabrication. • Precision CNC machining ensures accurate derailleur-to-cassette alignment. • Lightweight design keeps unsprung weight low and doesn’t affect handling. • Serves as a sacrificial safety feature to protect frames and derailleurs in crashes.

Fit, Compatibility & Installation

This Dropout 38 hanger is listed as a compatible replacement for several manufacturers — including Bianchi, Diamondback, Haro, Jamis, Kona and Trek models — but fit is frame-specific. Check your frame's hanger shape and bolt pattern against the Dropout 38 template or the original hanger before ordering. The part number to match is DROPOUT-38 (Wheels Manufacturing SKU 270404). Installation is straightforward: remove the damaged hanger, clean the mounting face, and bolt the new hanger in place using the correct fasteners and torque spec for your frame. If your hanger mounts to the axle or uses integrated hardware, ensure you reuse or replace OEM bolts as required. If you're unsure, a quick photo of the damaged hanger and mounting area makes it easy for our tech team to confirm fit.

Who This Hanger Is For

Ideal for mountain bikers, mechanics and home wrenchers who want an exact, durable replacement that restores shifting precision after a crash or bent hanger. Riders of Bianchi, Kona, Trek, Diamondback, Haro and Jamis frames will find this an essential spare to carry on long rides or keep in the workshop. If you race, ride aggressive trails, or tour in remote areas, having a trusted, lightweight replacement like the Dropout 38 reduces downtime and prevents more expensive damage to your frame or derailleur. Not sure if it fits your bike? Contact our fit specialists with your frame make and model and we'll help confirm compatibility.

Key Features

  • ✓ CNC-machined 6061-T6 aluminum for precision and long-term durability
  • ✓ Anodized finish resists corrosion and maintains tight tolerances
  • ✓ Direct-replacement fit for Bianchi, Diamondback, Haro, Jamis, Kona, Trek
  • ✓ Serves as sacrificial part to protect frame and derailleur in crashes
  • ✓ Lightweight and compact — ideal to carry as a spare on rides
  • ✓ Manufacturer Part #: DROPOUT-38 (Wheels Manufacturing SKU 270404)

Specifications

Misc #38, Multiple Makers

Product Identifiers

Vendor Item # DROPOUT-38
UPC 836572005118

Frequently Asked Questions

How do I know if Dropout 38 fits my bike?

Check the original hanger's silhouette and mounting bolt pattern against the Dropout 38. If you still have the old hanger, compare it visually or bring a photo to our fit team — matching shape and bolt spacing is the quickest way to confirm compatibility.

Is hardware included with the hanger?

Some dropouts are sold as the hanger only; hardware inclusion varies by model. If your frame requires a specific bolt or nut, plan to reuse the OEM fastener or order the correct replacement hardware to ensure proper torque and secure mounting.

Can I straighten a bent hanger instead of replacing it?

Minor bends can sometimes be straightened for short-term use, but straightening reduces metal fatigue resistance. Replacing with a new Dropout 38 restores factory alignment and reliability — the recommended long-term solution after an impact.

Will this hanger affect shifting performance?

A correct, straight hanger is essential for precise indexing and smooth shifting. The Dropout 38's CNC tolerances ensure the derailleur sits in the intended position for consistent gear changes when installed correctly.

Can I carry this hanger on rides as a spare?

Yes — the Dropout 38 is compact (shipping dims 3" x 3" x 0.3") and very lightweight (0.05 lb), making it an excellent spare to stash in a pack or tool roll for trail-side repairs.

Buying Guide

When buying a derailleur hanger, the most important factors are fit and material. Choose a hanger that exactly matches your frame's bolt pattern and silhouette — even small differences will affect shifting. Prefer CNC-machined aluminum hangers (like 6061-T6) for a balance of light weight, stiffness and predictable failure characteristics. Keep a spare hanger in your toolbox or pack if you ride trails, travel, or race. Check whether the replacement includes hardware and always follow your frame manufacturer's torque specs during installation. If in doubt, send a photo of the broken hanger and frame mounting area to a specialist for confirmation before purchasing.

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