$74.00
Rear derailleur hanger for 257 AMP and Alpenchallenge AMP (internal gear hub only)
If you’re a cycling enthusiast who owns a BMC urban or commuter bike, you’ve likely encountered the need for reliable spare parts to keep your ride smooth and efficient. One such essential component is the Dropout – No 79 – IGH, a specialized rear dropout designed specifically for internal gear hub systems. In this comprehensive blog post, we’ll dive deep into everything you need to know about the Dropout – No 79 – IGH, from its features and compatibility to installation tips and why it’s a must-have for maintaining your bike’s integrity. Whether you’re dealing with wear and tear or looking to upgrade, this guide will help you make an informed decision.
The Dropout – No 79 – IGH is a high-quality rear derailleur hanger and sliding dropout system manufactured by BMC Switzerland. It’s engineered for bikes equipped with internal gear hubs (IGH), which are popular in urban and commuter bicycles for their low maintenance and weather-resistant design. Unlike traditional derailleurs, IGH systems enclose the gears inside the rear hub, providing a cleaner, more reliable shifting experience.
This particular dropout, often referred to as Dropout No. 79 in BMC’s catalog, is made from durable materials to withstand the rigors of daily commuting. It comes in a sleek black finish, blending seamlessly with most bike frames. The package includes a pair of sliding dropouts with nuts, four M6x16mm bolts, two headless M5x35 nuts, and two M5x0.8×4 nuts, ensuring you have all the hardware needed for a straightforward replacement. Priced at around USD 74.00, it’s an affordable investment for extending the life of your bike.
Dropouts like the Dropout – No 79 – IGH play a crucial role in your bike’s frame. They are the slots where the rear wheel axle fits, allowing for proper chain tensioning and wheel alignment. In IGH setups, these dropouts are sliding to accommodate chain or belt tension adjustments, which is vital for smooth operation. Without a properly functioning dropout, you might experience issues like chain slippage, uneven wear, or even frame damage over time.
One of the standout aspects of the Dropout – No 79 – IGH is its targeted compatibility. It’s specifically designed for BMC models that feature internal gear hub mounts, ensuring a perfect fit without modifications. Key compatible bikes include the 257 AMP series and the Alpenchallenge AL line, both of which are renowned for their urban versatility and electric-assist options.
The 257 AMP is a premium urban e-bike that’s perfect for city dwellers. It combines a lightweight aluminum frame with integrated battery and motor systems, offering pedal-assist for effortless commuting. If your 257 AMP uses an IGH, the Dropout – No 79 – IGH is the go-to replacement part to maintain its performance.
Similarly, the Alpenchallenge AL is a hybrid fitness bike that’s agile on pavement and comfortable for longer rides. Its aluminum construction and flat-bar geometry make it ideal for weekend adventures or daily errands. For models with internal gear hubs, upgrading or replacing with the Dropout – No 79 – IGH ensures compatibility and reliability.
It’s important to note that this dropout is exclusively for internal gear hub configurations. If your bike uses a standard derailleur system, you might need a different model, such as BMC’s Dropout No. 80. Always check your bike’s specifications or consult a BMC dealer to confirm compatibility before purchasing.
What sets the Dropout – No 79 – IGH apart from generic bike parts? Let’s break down its key features and the benefits they provide to cyclists.
Crafted from high-strength aluminum or alloy (depending on the exact spec), the Dropout – No 79 – IGH is built to last. Its black anodized finish not only looks professional but also resists corrosion, making it suitable for all-weather riding. This durability means fewer replacements over time, saving you money and hassle.
The sliding mechanism allows precise adjustment of chain or belt tension, which is essential for IGH systems. Proper tension prevents premature wear on your drivetrain and ensures efficient power transfer from pedal to wheel. Riders often report smoother shifts and reduced noise after installing this dropout.
Unlike some spare parts that require additional purchases, the Dropout – No 79 – IGH comes with all necessary bolts and nuts. This all-in-one approach simplifies the repair process, especially for home mechanics.
By maintaining perfect wheel alignment, this dropout contributes to better handling and stability. For e-bike users like those on the 257 AMP, it supports the motor’s efficiency, potentially extending battery life during rides.
In terms of benefits, urban cyclists appreciate how the Dropout – No 79 – IGH supports low-maintenance setups. IGH bikes are less prone to dirt buildup compared to exposed derailleurs, making them ideal for rainy commutes or off-road paths. Additionally, the part’s compatibility with belt drives (common in modern BMC models) offers a quieter, cleaner alternative to traditional chains.
Installing the Dropout – No 79 – IGH is a task that most intermediate cyclists can handle at home with basic tools. Here’s a detailed guide to get you started. Remember, if you’re unsure, visit a professional bike shop to avoid any mishaps.
Park your bike on a stable stand and remove the rear wheel. Loosen the old dropout bolts using the appropriate hex wrench. Carefully slide out the old dropout, noting its position for reference.
Position the new Dropout – No 79 – IGH in place, aligning it with the frame’s slots. Insert the provided M6x16mm bolts and tighten them loosely at first. Attach the nuts as per the included hardware.
Reinstall the rear wheel and adjust the sliding dropout to achieve proper chain or belt tension. Use a tension gauge for accuracy—aim for the manufacturer’s recommended specs, typically around 10-15mm of slack for chains.
Tighten all bolts to the specified torque (usually 8-10 Nm for M6 bolts). Spin the wheel to check for smooth rotation and test the gears. Take a short test ride to ensure everything feels right.
If you’re working on an e-bike like the 257 AMP, disconnect the battery before starting to avoid electrical issues. Safety first!
The Dropout – No 79 – IGH is available through official BMC retailers and online stores. BMC’s US website lists it for USD 74.00, with options for quick shipping. Other sites like Bike24 or specialized cycling shops may offer it at similar prices, sometimes with bundle deals for other spare parts.
When shopping, look for the SKU 30001764 to ensure you’re getting the genuine product. Avoid counterfeit parts, as they can compromise your bike’s safety. International buyers should check regional BMC sites, such as in Europe or Canada, for local availability.
Cyclists who have installed the Dropout – No 79 – IGH often praise its fit and finish. One reviewer on a cycling forum noted, “After my original dropout wore out from daily commutes, this replacement was a game-changer. Easy install and perfect tension.” Another user highlighted its compatibility with belt drives: “Works flawlessly on my Alpenchallenge AL—quiet and reliable.”
However, some mention that precise alignment is key to avoiding issues. Overall, ratings hover around 4.5 stars on retailer sites, with users appreciating BMC’s quality control.
BMC Switzerland has a reputation for innovation in bike design, from road racers to urban commuters. The Dropout – No 79 – IGH exemplifies their commitment to detail, ensuring that even spare parts meet high standards. By investing in genuine components, you’re not just fixing your bike—you’re enhancing its longevity and performance.
In summary, the Dropout – No 79 – IGH is an indispensable part for BMC owners with IGH-equipped bikes. Its durable design, easy installation, and perfect compatibility make it a smart choice for maintenance or upgrades. Whether you’re cruising city streets on a 257 AMP or tackling fitness rides on an Alpenchallenge AL, this dropout ensures your bike stays in top shape.
If you’re experiencing dropout issues or simply want to stock up on spares, consider adding the Dropout – No 79 – IGH to your cart today. Happy cycling!
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