Wheels Manufacturing Dropout 17
Wheels Manufacturing

Wheels Manufacturing Dropout 17

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Dropout 17 is a Wheels Manufacturing direct replacement derailleur hanger for Cannondale road frames (91-current). CNC-machined aluminum construction delivers precise alignment and lightweight durability.

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Product Details

Overview & Technology

Wheels Manufacturing Dropout 17 (Mfg. Part #: DROPOUT-17, Product #270386) is a direct-fit derailleur hanger made for Cannondale road frames (91-current). Designed as a sacrificial part to protect your frame and drivetrain, this hanger restores correct derailleur position after a crash or bend. Manufacturing and finish: The Dropout 17 is CNC-machined from aircraft-grade aluminum for consistent geometry and low weight (0.03 lb). A corrosion-resistant finish helps it stand up to road grime and seasonal riding; precise machining keeps shifting true without frame modification.

Key Features and Benefits

Precision-fit replacement: Engineered to match Cannondale's #17 hanger profile so the derailleur bolt and hanger interface line up exactly as the factory intended. That precision reduces shifting noise and limits chain rub after installation. • Lightweight CNC-machined aluminum construction for stiffness and low mass. • Black anodized / corrosion-resistant finish for longevity in wet, salty conditions. • Sacrificial design protects the frame in crashes—easy and inexpensive to replace.

Fit, Installation & Compatibility

The Dropout 17 is listed as the OEM-style replacement for Cannondale road frames that use the #17 hanger (91-current). It installs using the frame's existing hanger mounting location and standard derailleur bolt. Always verify that your frame's hanger shape matches the #17 profile before purchasing. Installation is straightforward: remove the damaged hanger, mount the Dropout 17 in the same orientation, torque the mounting bolt to the manufacturer's spec, then check derailleur alignment with a hanger gauge or by shifting through the cassette. If you don't have a hanger alignment tool, most bike shops can fine-tune it quickly.

Who This Is For

This is for road riders who own a Cannondale frame with the #17 hanger profile and need a reliable replacement after a crash or wear. It's equally useful for mechanics and home wrenchers who keep a spare hanger on hand to minimize downtime on group rides or races. Because it's a direct OEM-style replacement from Wheels Manufacturing, it's also a smart upgrade for riders who want a durable, precisely machined spare part that maintains factory shifting geometry.

Key Features

  • ✓ Direct-fit replacement for Cannondale road frames (hanger #17, 91-current)
  • ✓ CNC-machined 6061-T6 aluminum for strength and consistent alignment
  • ✓ Lightweight — approx. 0.03 lb to keep overall bike weight low
  • ✓ Corrosion-resistant finish for long life in wet conditions
  • ✓ Sacrificial part protects frame and derailleur in crashes
  • ✓ Installs with factory mounting location and standard derailleur bolt

Specifications

Misc #17, Cannondale

Product Identifiers

Vendor Item # DROPOUT-17
UPC 836572002919

Frequently Asked Questions

How do I know this hanger fits my Cannondale frame?

Check your frame's hanger number or match the shape against photos of the #17 profile. This Dropout 17 is specified for Cannondale road frames listed as #17 (1991-current). If unsure, remove the old hanger and compare it or ask your local shop for confirmation.

Is hardware included for installation?

Most direct-fit hangers reuse the frame's original mounting bolt. Wheels Manufacturing supply policies vary, so confirm whether your bike retained the factory bolt. If you need a mounting bolt, we can recommend a compatible replacement at checkout.

What material is the hanger made from?

The Dropout 17 is CNC-machined from high-grade aluminum alloy (commonly 6061-T6) with a corrosion-resistant finish. That construction balances stiffness, weight and predictable failure characteristics if the hanger is overloaded.

Can I ride with a slightly bent hanger until I replace it?

Riding with a bent hanger risks poor shifting, chain drop, and potential damage to the derailleur or wheel. If you must ride, keep speeds low and avoid hard efforts — but replace or realign the hanger as soon as possible.

How do I check hanger alignment after installation?

The best method is a derailleur hanger alignment gauge. Alternatively, reattach the derailleur and check indexing across the cassette; persistent rubbing or skipping usually indicates misalignment and needs professional correction.

Is this hanger compatible with all Cannondale drivetrains?

Yes — the hanger provides the frame-side interface for the derailleur bolt. Compatibility with a specific derailleur or groupset depends on the derailleur's hanger bolt standard, but most modern road derailleurs use the same hanger interface and will fit this Dropout 17.

Buying Guide

When choosing a replacement derailleur hanger, match the hanger number and profile to your frame first — geometry matters more than brand. Prefer CNC-machined aluminum hangers for consistent fit and predictable failure behavior; they’re lightweight and easy to source. Keep a spare hanger on hand if you ride frequently or in groups. Installation requires basic tools, but accurate alignment is critical for precise shifting, so follow torque specs and consider a professional setup if you're unsure.

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