Ultimate Guide to Dropout – No 73 Black: Everything You Need to Know About This Essential Bike Derailleur Hanger

Introduction to Dropout – No 73 Black

If you’re passionate about cycling, whether it’s hitting the trails on a mountain bike or cruising the roads on a sleek road machine, maintaining your bike’s drivetrain is key to a smooth ride. One often-overlooked but vital component is the derailleur hanger, also known as a dropout. Today, we’re focusing on the Dropout – No 73 Black, a popular replacement part that’s gained traction among cyclists for its durability and compatibility.

BMC Dropout – No 73 Black

The Dropout – No 73 Black is essentially a rear derailleur hanger designed to protect your bike’s frame and ensure precise shifting. Manufactured by reputable brands like BMC and Wheels Manufacturing, this black anodized piece is engineered to exact tolerances, making it a go-to choice for bike repairs and upgrades. It’s not just a spare part; it’s a safeguard that can prevent costly damage to your frame during crashes or impacts.

In this comprehensive guide, we’ll explore what makes the Dropout – No 73 Black stand out, its features, compatibility with various bike models, installation tips, and much more. Whether you’re a seasoned mechanic or a beginner cyclist, this post will equip you with all the necessary information to make an informed decision.

What Is a Derailleur Hanger and Why Do You Need One?

Before we delve deeper into the Dropout – No 73 Black, let’s cover the basics. A derailleur hanger is a small, replaceable part attached to the rear dropout of your bike frame. Its primary function is to mount the rear derailleur, which shifts the chain across the cassette for gear changes.

Why is it important? Derailleur hangers are intentionally designed to be the “weak link” in your drivetrain. In the event of an impact—say, from a rock on the trail or a fall—they bend or break to absorb the force, protecting the more expensive frame from damage. Replacing a hanger is far cheaper and easier than repairing a cracked frame.

The Dropout – No 73 Black exemplifies this design philosophy. Made from high-quality 6061 aluminum, it’s CNC-machined for precision, ensuring it aligns perfectly with your derailleur for crisp, reliable shifting. Its black finish not only looks sleek but also provides corrosion resistance, ideal for all-weather riding.

Key Features of Dropout – No 73 Black

What sets the Dropout – No 73 Black apart from generic hangers? Let’s break it down:

Material and Construction

Crafted from solid 6061 aluminum, this hanger offers superior strength without adding unnecessary weight. The CNC machining process ensures exact tolerances, which translates to better shifting performance compared to stock hangers that might flex under load.

Color and Aesthetics

The black anodized finish gives it a professional, understated look that matches most modern bike frames. It’s not just about style— the anodization enhances durability against scratches and environmental elements.

Included Hardware

Most versions of the Dropout – No 73 Black come with essential mounting hardware, such as a bolt and nut, making installation straightforward.

Dropout-73 Wheels Manufacturing Wheels Manufacturing Dropout-73 – Bike Frame Replacement Part Derailleur Hanger

This is particularly handy for quick roadside repairs.

Weight and Dimensions

Weighing in at around 19 grams (0.67 ounces), it’s lightweight enough not to impact your bike’s overall performance. Its compact design fits seamlessly into the frame’s dropout area.

Enhanced Stiffness

Users report that this hanger is stiffer than original equipment, leading to improved shifting accuracy, especially under heavy pedaling or in rough terrain.

These features make the Dropout – No 73 Black a reliable upgrade for anyone serious about their bike’s maintenance.

Compatibility: Which Bikes Does Dropout – No 73 Black Fit?

One of the biggest advantages of the Dropout – No 73 Black is its broad compatibility. It’s designed to fit a range of bike models from various brands, including:

• BMC Bikes: Specifically for models like the Twostroke AL (MY2021) and other endurance or gravel bikes.
• Iron Horse: Certain mountain bike frames.
• Marin: Popular for their adventure and trail bikes.
• Salsa: Known for gravel and touring models.
• Schwinn: Entry-level to mid-range bikes.

If you’re unsure about compatibility, check your bike’s frame for the dropout number or consult the manufacturer’s specifications. The Dropout – No 73 Black is often listed as a direct replacement for hanger #73 across these brands.

For BMC owners, it’s positioned as part number 4 on the Twostroke AL frame, ensuring a perfect fit. Always verify with your bike’s manual or a professional mechanic to avoid mismatches.

How to Install Dropout – No 73 Black: A Step-by-Step Guide

Installing a new derailleur hanger like the Dropout – No 73 Black is a relatively simple task that most cyclists can handle with basic tools. Here’s a detailed guide:

Tools You’ll Need

• Allen wrenches (typically 4mm and 5mm)
• Torque wrench (recommended for precision)
• Chain tool (if adjusting the chain)
• Clean rags and lubricant

Step 1: Remove the Old Hanger

Shift to the smallest cog, then remove the rear wheel. Unscrew the derailleur from the hanger, and then remove the hanger bolts from the frame. Gently pry off the old hanger if it’s bent.

Step 2: Prepare the New Hanger

Inspect the Dropout – No 73 Black for any shipping damage. Apply a bit of threadlocker to the bolts if provided.

Step 3: Attach the Hanger

Align the hanger with the frame’s dropout slots. Insert and tighten the bolts to the manufacturer’s specified torque (usually 8-10 Nm). Reattach the derailleur.

Step 4: Reinstall the Wheel and Test

Put the wheel back on, adjust the chain tension, and test-shift through all gears. Ensure everything aligns properly.

D37 derailleur hanger (32-73-250) (EZ1852) for Diamondback, Ghost bike

If you’re not comfortable with this process, visit a local bike shop. Proper installation ensures the longevity of your Dropout – No 73 Black and optimal bike performance.

Benefits of Using Dropout – No 73 Black

Upgrading to the Dropout – No 73 Black offers several advantages:

• Protection: Sacrificial design saves your frame from expensive repairs.
• Improved Performance: Stiffer construction leads to sharper shifts.
• Durability: Aluminum build withstands daily abuse.
• Cost-Effective: Priced around $29-32, it’s an affordable spare to keep on hand.
• Versatility: Fits multiple brands, making it a universal option for multi-bike owners.

Cyclists who ride in challenging conditions, like off-road trails, will especially appreciate how the Dropout – No 73 Black maintains alignment even after minor impacts.

Customer Reviews and Real-World Experiences

From online forums and retailer feedback, the Dropout – No 73 Black receives high praise. Users on eBay and bike sites note its perfect fit and quick delivery. One reviewer mentioned, “This hanger saved my BMC frame after a crash—shifted like new afterward.”

For Wheels Manufacturing versions, cyclists highlight the enhanced stiffness: “Better than OEM, no more ghost shifting.” Overall, it’s rated highly for value and reliability.

Where to Buy Dropout – No 73 Black

You can find the Dropout – No 73 Black at various retailers:

• BMC Official Site: Direct from the source for authenticity.
• eBay: Often available with fast shipping.
• Specialized Bike Shops: Like Quick Cranks or McPhail’s Cycle.
• Online Platforms: Amazon or dedicated cycling sites for competitive pricing.

Prices range from $26 to $32, depending on the seller. Always check for bundles that include extra hardware.

Alternatives to Dropout – No 73 Black

If the Dropout – No 73 Black isn’t available, consider similar hangers like the Wheels Manufacturing Dropout 9 or other numbered variants. However, for exact fit, stick to #73.

For those preferring silver finishes, there are non-black options, but the black version offers better stealth and protection.

Dropout Hardware Tail For Commencal GT Torelli Rear Derailleur Gear Mech Hanger

Maintenance Tips for Your Derailleur Hanger

To maximize the life of your Dropout – No 73 Black:

• Regularly inspect for bends after rides.
• Clean with mild soap and water; avoid harsh chemicals.
• Carry a spare on long trips.
• Align it properly using a hanger alignment tool if needed.

These habits will keep your bike shifting smoothly for miles.

Conclusion: Why Choose Dropout – No 73 Black?

In summary, the Dropout – No 73 Black is an indispensable part for any cyclist looking to protect their investment and enhance performance. Its robust construction, wide compatibility, and affordable price make it a smart choice. Whether you’re replacing a damaged hanger or stocking up on spares, this component won’t disappoint.

Ready to upgrade? Head to your favorite retailer and get your Dropout – No 73 Black today. Happy cycling!