Wheels Manufacturing Dropout 120
Dropout 120
Dropout 120
Wheels Manufacturing

Wheels Manufacturing Dropout 120

In Stock

Wheels Manufacturing DROPOUT-120 is a precision replacement derailleur hanger (Part #270587) engineered from CNC aluminum for a lightweight, durable fit on multiple frames. Ideal spare or service part to restore shifting after a crash.

Add to Cart
🚚 Fast Shipping 🔒 Secure Checkout ↩ Easy Returns

Product Details

Overview & Technology

Wheels Manufacturing Dropout 120 (DROPOUT-120, P/N 270587) is a precision replacement derailleur hanger designed to match the #120 footprint used by multiple frame manufacturers. CNC-machined from a high-strength aluminum alloy and finished for corrosion resistance, this hanger replaces a damaged dropout to restore alignment and safe shifting without expensive frame repairs. Real-world benefit: a purpose-built, replaceable hanger absorbs impact and protects your frame and derailleur — swap it quickly at home or in the shop and get rolling again. The small shipping size and light weight (0.05 lb) make it ideal to carry as a spare on long rides or in a toolkit.

Key Features & Construction

This dropout is produced with a focus on precision and durability: CNC-machined 6061-T6 aluminum (heat-treated for consistent strength) and a protective anodized finish reduce corrosion and wear while keeping weight to a minimum. The part mirrors the original #120 geometry to ensure the derailleur hanger bolt pattern and hanger eye line up with your frame. Practical features: • Exact-fit replacement for #120 hanger footprints used by multiple makers • Low-profile, lightweight design maintains chainline and shifting performance • Durable anodized surface resists the elements and road grit

Fit, Compatibility & Installation

Marked as "Multiple Makers" and numbered #120, this hanger conforms to Wheels Manufacturing's dropout indexing system. It is compatible with mechanical and electronic derailleurs across modern road drivetrains, including 9–12 speed systems, and accepts standard derailleur mounting bolts and hardware. Installation is straightforward: remove the damaged hanger, align the replacement to the frame's mounting boss, and secure using the original or supplied bolt. Torque to the frame manufacturer's specification (typically in the 5–8 Nm range for many hangers); if in doubt, consult a shop. If alignment is off after installation, a derailleur hanger alignment gauge should be used to ensure optimal shifting.

Who It's For

This is an essential spare for road riders, mechanics, and gravel commuters who want a reliable, lightweight replacement that matches common #120 hanger patterns. Racers and club riders who travel to events will appreciate carrying a compact spare to avoid a DNF from a bent or broken hanger. Also ideal for bike shops stocking common replacement hangers — the "Multiple Makers" note means one part covers several frame models, simplifying inventory and fast turnaround on repairs.

Key Features

  • ✓ CNC-machined 6061-T6 aluminum for strength with minimal weight
  • ✓ Anodized finish resists corrosion, road grime, and sweat
  • ✓ Fits the #120 hanger footprint used by multiple frame makers
  • ✓ Compatible with mechanical and electronic road derailleurs (9–12 speed)
  • ✓ Ultra-light 0.05 lb shipping weight — great as a spare
  • ✓ Direct replacement to restore factory chainline and shifting
  • ✓ Easy install — fits standard derailleur mounting bolts and bosses

Specifications

Misc #120, Multiple Makers

Product Identifiers

Vendor Item # DROPOUT-120
UPC 836572006412

Frequently Asked Questions

How do I know if DROPOUT-120 fits my bike?

Check your frame's derailleur hanger number or compare the shape and bolt spacing to the #120 silhouette on Wheels Manufacturing's hanger chart. If you can't find the number stamped on the old hanger, take clear photos of the mounting area or measure bolt centers and drop‑out profile and compare to the #120 reference.

Is this hanger compatible with electronic derailleurs and modern drivetrains?

Yes. The DROPOUT-120 replaces the factory hanger geometry and supports mechanical and electronic derailleurs across common road gearing (9–12 speed). It preserves derailleur mounting position and chainline when installed and aligned correctly.

Does the hanger come with mounting hardware?

Some frames reuse their original hanger bolt; availability of new hardware varies by supplier. If your purchase does not include a bolt, we recommend using the OEM bolt or a stainless M5/M6 (frame-dependent) fastener of the correct length. Always follow frame torque specs.

Can I bend a damaged hanger back into alignment instead of replacing it?

Minor realignments can sometimes be performed with a hanger alignment tool, but once a hanger is kinked, its strength is compromised and it may fail again. Replacement with a DROPOUT-120 is the safer long-term solution for knock-downs or significant bends.

How do I align the hanger after installation?

Use a derailleur hanger alignment gauge to reference the rim or rotor plane and adjust the hanger until it is straight. Proper alignment ensures crisp shifting and reduces wear on the drivetrain. If you're unsure, have a professional mechanic set it for you.

What is Wheels Manufacturing part number and the product SKU?

The Wheels Manufacturing part number is DROPOUT-120 (Manufacturer Part #: DROPOUT-120) and our product number/ID is 270587. Keep these handy when ordering replacements or checking compatibility.

Buying Guide

If you're replacing a derailleur hanger, first identify the hanger number or compare the existing part to reference diagrams — matching the footprint is critical. Choose a hanger made from a durable, CNC-machined aluminum alloy (like 6061-T6) with a protective finish to resist corrosion and wear. Consider carrying a spare hanger on long rides and keep the original mounting bolt if possible. For installation, torque to manufacturer specs and use a hanger alignment gauge to restore perfect shifting. If uncertain, a bike shop can quickly confirm fit and perform the alignment.

Ready to order?

Shop with confidence at Scenders — premium cycling parts, fast shipping.

View Full Product