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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.
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.
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.
What sets the Dropout – No 73 Black apart from generic hangers? Let’s break it down:
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.
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.
Most versions of the Dropout – No 73 Black come with essential mounting hardware, such as a bolt and nut, making installation straightforward.
This is particularly handy for quick roadside repairs.
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.
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.
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:
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.
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:
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.
Inspect the Dropout – No 73 Black for any shipping damage. Apply a bit of threadlocker to the bolts if provided.
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.
Put the wheel back on, adjust the chain tension, and test-shift through all gears. Ensure everything aligns properly.
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.
Upgrading to the Dropout – No 73 Black offers several advantages:
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.
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.
You can find the Dropout – No 73 Black at various retailers:
Prices range from $26 to $32, depending on the seller. Always check for bundles that include extra hardware.
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.
To maximize the life of your Dropout – No 73 Black:
These habits will keep your bike shifting smoothly for miles.
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!
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