Wheels Manufacturing Dropout 243

$37.50

In Stock

OEM-fit Dropout 243 derailleur hanger from Wheels Manufacturing — CNC-machined aluminum replacement for Boardman frames. Lightweight, durable, and designed for precise shifting.

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Product Details

Overview & Technology

Wheels Manufacturing Dropout 243 (DROPOUT-243) is a direct-replacement derailleur hanger engineered to the original Boardman specifications. Manufactured to tight tolerances, this hanger restores correct derailleur alignment and shifting performance after a crash or bent hanger incident. The hanger is CNC-machined from high-strength aluminum alloy and finished to resist corrosion and everyday wear. At just a few grams and compact shipping dimensions (2.25" x 0.5" x 1.25", 0.02 lb), it delivers OEM fit and function without adding unnecessary weight to your road build.

Key Features & Benefits

Precision construction for repeatable shifting. The Dropout 243 is machined to maintain the correct derailleur-to-cassette geometry, so chain gaps and indexing return to factory behavior once installed. Durable, lightweight materials. Built from a high-grade aluminum alloy and treated with a protective finish, the hanger balances impact resistance with minimal weight. It's ideal for riders who want a reliable, tidy replacement that preserves frame integrity. • Exact OEM fit for Boardman frames — direct swap. • Precision CNC machining for consistent alignment. • Lightweight construction keeps rotating mass low. • Protective finish reduces corrosion and wear.

Fit, Compatibility & Installation

This part is sold as Wheels Manufacturing Dropout 243, Part #DROPOUT-243 (Manufacturer Part #: DROPOUT-243, Product Number: 271059) and is specifically listed for Boardman frames. Before ordering, verify your bike’s model/year and compare the hanger silhouette to your existing part — photos or a frame serial can help confirm a match. Installation is a straightforward bolt-on replacement for most frames with a removable hanger. Typical installation requires removing the rear derailleur, unbolting the old hanger, and torquing the new hanger to the manufacturer’s specification. We recommend using a torque wrench and a derailleur hanger alignment gauge to ensure perfect straightness for crisp shifting.

Who This Hanger Is For

This hanger is ideal for road riders and commuters who own a Boardman-framed bike and need an exact OEM-style replacement after damage or wear. It's also a practical spare to carry on longer rides or keep in your workshop — a bent hanger is the most common mechanical that ends a ride prematurely. Mechanics, home wrenchers and fleet managers will appreciate the precision fit and durable construction that reduces repeat issues. If you’re converting drivetrains or using non-standard hardware, double-check compatibility first — this is a like-for-like replacement, not a universal adjustable hanger.

Key Features

✓ CNC-machined high-strength aluminum for precision and durability
✓ Direct OEM-style fit for Boardman frames — no frame modification
✓ Lightweight replacement — minimal added mass (approx 0.02 lb shipping weight)
✓ Protective finish resists corrosion and everyday wear
✓ Restores derailleur geometry for accurate indexing and shifting
✓ Sold as the hanger only — confirm mounting bolt/hardware before ordering
✓ Compact dimensions make it an easy spare to stow on rides

Product Identifiers

Vendor Item #	DROPOUT-243
UPC	811079021779

Frequently Asked Questions

Which bikes is the Dropout 243 compatible with?

Dropout 243 is designed to match the OEM derailleur hanger profile used on many Boardman frames. Compatibility depends on model year and frame variant — compare the hanger shape and bolt pattern to your existing part or check your frame’s documentation before purchasing.

Is mounting hardware included with the hanger?

This product is typically sold as the hanger only. Some frames reuse the original hanger bolt and plate, while others require a replacement bolt or plate. Verify whether your bike retains the original hardware or order a suitable hanger bolt separately.

What material is the hanger made from and how durable is it?

The Dropout 243 is CNC-machined from a high-strength aluminum alloy and finished to resist corrosion. It’s engineered to be sacrificial in a crash — designed to bend or shear to protect the frame and derailleur, then be replaced easily.

How do I know if my hanger is bent or needs replacing?

Symptoms of a bent hanger include poor indexing, chain rub on certain gears, or difficulty shifting to the largest sprockets. A derailleur hanger alignment tool provides a definitive check; many shops will measure and realign the hanger or recommend replacement if it's beyond repair.

Can I install this hanger at home?

Yes — basic installation is bolt-on and within the skill of most home mechanics. You’ll need standard hex/torx tools to remove the derailleur and bolt, and a torque wrench is recommended for correct fastening. For best results use a hanger alignment tool to ensure perfect alignment after installation.

How do I confirm I'm ordering the correct part number?

Confirm the product number (271059) and manufacturer part number (DROPOUT-243) against your current hanger or your bike’s parts list. If in doubt, send photos of your existing hanger and frame dropout to our support team for verification.

Buying Guide

When buying a replacement derailleur hanger, the top priorities are precise fit and correct bolt pattern. Measure and photograph your existing hanger, verify the manufacturer part number (DROPOUT-243) and match the silhouette to avoid fitment issues. Hangers are inexpensive but critical — the right part restores correct shifting geometry and protects your frame from damage. Also consider whether you need just the hanger or additional hardware. Many frames reuse the original bolt and mounting plate; others need a new bolt. If you plan to carry a spare on rides, lightweight, OEM-fit hangers like the Dropout 243 are compact and reliable options to have in your toolkit.

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