Convert Nexus Pedal Brake To Hand Brake A Comprehensive Guide

Are you looking to convert your Nexus bike from a pedal-brake system? Pedal brakes, also known as coaster brakes, are a traditional braking system where you pedal backward to engage the brakes. While reliable, they may not offer the same level of control and stopping power as other braking systems, especially in varied terrains or wet conditions. Many cyclists prefer the responsiveness and modulation of hand brakes, making a conversion a worthwhile upgrade. This guide will walk you through the process of converting your Nexus bike from a pedal-brake to a hand-brake system, covering everything from the necessary components to the step-by-step instructions.

Understanding Nexus Hub Gears and Braking Systems

Before diving into the conversion, let's understand Nexus hub gears and the different braking systems available. Nexus is a popular range of internally geared hubs manufactured by Shimano. These hubs offer multiple gears within a sealed unit, providing a clean and low-maintenance drivetrain. Nexus hubs are commonly found on city bikes, commuter bikes, and e-bikes due to their reliability and ease of use. When considering converting a Nexus bike from a pedal-brake system, it's crucial to understand the compatibility and limitations of your specific hub model. Different Nexus hubs have varying designs, and some may be more easily converted than others. Understanding the intricacies of the Nexus hub and the pedal-brake system is essential for a successful conversion. The pedal-brake system, often called a coaster brake, uses a series of internal mechanisms within the hub to engage the brake when the pedals are pedaled backward. While this system is simple and reliable, it lacks the modulation and stopping power of hand brakes. This is because the braking force is directly related to the force applied to the pedals, making it difficult to control braking in slippery conditions or during emergency stops. Hand brakes, on the other hand, offer much greater control and modulation, allowing the rider to fine-tune the braking force based on the situation. They also allow for more immediate braking, as they are not dependent on the position of the pedals. The conversion process involves replacing the coaster brake mechanism with a different braking system, such as a roller brake or a disc brake, which are compatible with hand levers. Additionally, the process requires installing the appropriate cables and levers to actuate the brakes. Each of these steps needs to be carefully executed to ensure the new braking system is safe and effective. Furthermore, understanding the specific model of your Nexus hub is crucial because some models may be easier to convert than others, and some may require specific parts or modifications. By understanding the basics of Nexus hubs and pedal-brake systems, you can better assess the feasibility and requirements of the conversion. This foundational knowledge will ensure a smoother and safer conversion process, ultimately enhancing your riding experience with improved braking performance.

Why Convert from Pedal-Brake to Hand-Brake?

There are several compelling reasons to convert your Nexus bike from a pedal-brake system to a hand-brake system. Enhanced Control and Modulation is a primary benefit. Hand brakes offer superior control over braking force compared to pedal brakes. This allows for more precise adjustments, especially in varying road conditions or during emergency stops. With hand brakes, you can modulate the braking power, applying just the right amount of force needed to slow down or stop safely. This level of control is particularly crucial in wet or slippery conditions, where sudden braking with a coaster brake can lead to skidding. Another significant advantage is Improved Safety. Hand brakes generally provide shorter stopping distances compared to pedal brakes. This is because hand brakes allow for more immediate and controlled braking, whereas pedal brakes require the rider to pedal backward, which can be less intuitive in emergency situations. The ability to stop quickly and reliably is essential for safe cycling, especially in urban environments or on busy roads. In addition to safety, hand brakes offer Greater Versatility. Pedal brakes can be limiting, especially on hilly terrain or when carrying heavy loads. Hand brakes provide consistent braking power regardless of the terrain or load, making them a more versatile option for various riding conditions. They also allow for more controlled braking on descents, preventing the bike from gaining excessive speed. Furthermore, hand brakes offer Better Ergonomics. For many riders, hand brakes are more ergonomic and easier to use than pedal brakes. The hand levers are readily accessible and require less effort to engage compared to pedaling backward. This can be especially beneficial for riders with joint issues or those who find pedal brakes uncomfortable to use. Another factor to consider is Modernization and Compatibility. Hand brakes are the standard on most modern bicycles, making them more compatible with other components and accessories. If you plan to upgrade other parts of your bike in the future, such as the wheels or forks, having hand brakes ensures greater compatibility. Lastly, Personal Preference plays a significant role in the decision to convert. Many cyclists simply prefer the feel and responsiveness of hand brakes. The ability to feather the brakes and maintain control in various situations can enhance the overall riding experience. By weighing these benefits against the simplicity and reliability of pedal brakes, you can make an informed decision about whether a conversion is right for you. Ultimately, upgrading to hand brakes can significantly improve your bike's performance, safety, and overall riding experience.

Essential Components for the Conversion

To convert your Nexus bike from a pedal-brake system to hand brakes, you'll need several essential components. Selecting the right parts is crucial for a successful and safe conversion. The first key component is a Nexus Hub with Hand-Brake Compatibility. Not all Nexus hubs are designed for hand brakes. You'll need a hub that has the appropriate mounting points or interfaces for a hand-brake system, such as a roller brake or disc brake. Check your hub model to confirm its compatibility before purchasing any other parts. If your current hub isn't compatible, you may need to replace it with a different Nexus hub model. Next, you'll need to choose a Brake System. Common options include roller brakes, disc brakes, and V-brakes. Roller brakes are a popular choice for Nexus hubs due to their enclosed design and low maintenance. Disc brakes offer excellent stopping power, especially in wet conditions, but require a frame and fork with disc brake mounts. V-brakes are a traditional option but may not be compatible with all Nexus hubs. Consider your riding conditions and desired braking performance when selecting a brake system. Brake Levers are another essential component. You'll need a set of brake levers that are compatible with your chosen brake system. Ensure the levers are comfortable to use and provide sufficient leverage for effective braking. The levers should also be compatible with the diameter of your handlebars. Brake Cables and Housing are necessary to connect the brake levers to the brake mechanism. Use high-quality cables and housing for smooth and reliable braking performance. Ensure the cables are the correct length for your bike and that the housing is properly routed to prevent binding or friction. Depending on the brake system you choose, you may also need Caliper Mounting Hardware. For disc brakes, you'll need the appropriate adapters and mounting bolts to attach the calipers to your frame and fork. For roller brakes, you may need a reaction arm and mounting hardware. Ensure you have all the necessary hardware before starting the conversion. Another important consideration is the Wheel Compatibility. If you're switching to a disc brake system, you'll need a wheelset that is compatible with disc brakes. This means the wheels should have disc brake mounts and be strong enough to handle the braking forces. You may also need to replace your wheel if your current hub isn't compatible with hand brakes. Lastly, don't forget about Tools. You'll need a range of tools for the conversion, including wrenches, Allen keys, cable cutters, and possibly a hub cone spanner. Having the right tools will make the job easier and prevent damage to your bike. By carefully selecting these essential components, you can ensure a successful conversion from pedal brakes to hand brakes on your Nexus bike, enhancing your riding experience with improved safety and control.

Step-by-Step Conversion Process

The process to convert your Nexus bike from a pedal-brake system to hand brakes involves several steps, each requiring careful attention to detail. Preparation is Key. Before you start, gather all the necessary tools and components. This includes the new brake system (roller brake or disc brake), brake levers, cables, housing, and any specific mounting hardware for your chosen system. Ensure you have a clean workspace and a bike stand to make the process easier. Safety should always be your top priority, so wear appropriate safety gear, such as gloves and eye protection. Now let’s move on to Removing the Pedal-Brake System. Begin by disconnecting the existing coaster brake system. This typically involves removing the rear wheel and disassembling the hub to remove the coaster brake internals. Refer to your Nexus hub's service manual for specific instructions, as the disassembly process can vary between models. Carefully remove the brake shoes, springs, and other components of the coaster brake system. Clean the hub thoroughly to remove any grease or debris. The next step is Installing the New Hub (if necessary). If your existing hub isn't compatible with hand brakes, you'll need to replace it with a compatible Nexus hub. Follow the manufacturer's instructions for installing the new hub into your wheel. Ensure the spokes are properly tensioned and the wheel is trued. This step may require professional assistance if you're not comfortable with wheel building. Now you should Mount the Brake Caliper or Roller Brake. If you're installing a roller brake, attach it to the frame using the appropriate mounting hardware and reaction arm. For disc brakes, mount the caliper to the frame or fork using the correct adapters and bolts. Ensure the caliper is properly aligned with the rotor to prevent rubbing or uneven wear. Then Attach the Brake Lever to the Handlebar. Position the brake lever on the handlebar in a comfortable and ergonomic position. Secure the lever using the mounting bolts, ensuring it is tight enough to prevent slippage but not so tight that it damages the handlebar. The subsequent step is Route the Brake Cables and Housing. Run the brake cable housing from the brake lever to the brake caliper or roller brake. Use cable cutters to trim the housing to the correct length. Ensure the housing is routed smoothly and doesn't have any sharp bends or kinks, which can impede braking performance. Connect the Brake Cables. Thread the brake cable through the housing and attach it to the brake caliper or roller brake. Adjust the cable tension so that the brakes engage smoothly and release fully. Use cable end caps to prevent fraying of the cable ends. A very crucial step is Adjust the Brakes. Fine-tune the brake adjustment to ensure optimal braking performance. This involves adjusting the cable tension, brake pad position (for disc brakes), or roller brake mechanism. Test the brakes thoroughly to ensure they provide sufficient stopping power and don't rub against the wheel when released. Finally, it’s time to Test Ride and Fine-Tune. Take your bike for a test ride to ensure the new brakes are working properly. Check for any issues, such as squealing, rubbing, or uneven braking. Make any necessary adjustments to fine-tune the brake performance. By following these steps carefully, you can successfully convert your Nexus bike from pedal brakes to hand brakes, enhancing your safety and control on the road.

Maintenance and Care After Conversion

After you convert your Nexus bike from a pedal-brake system to hand brakes, proper maintenance and care are essential to ensure the longevity and optimal performance of your new braking system. Regular maintenance will not only keep your brakes functioning smoothly but also enhance your safety on the road. The first maintenance task is Cable and Housing Inspection. Periodically inspect the brake cables and housing for any signs of wear, fraying, or damage. Replace the cables and housing if you notice any issues, as worn cables can compromise braking performance. Lubricate the cables regularly to ensure smooth operation. A drop of light oil applied to the cable entry points can prevent friction and corrosion. Moving on to Brake Lever Maintenance. Check the brake levers for proper function and tightness. Ensure the levers move smoothly and return to their original position after being released. Tighten any loose bolts or screws to prevent slippage. Clean the levers regularly to remove dirt and grime, which can affect their performance. Roller Brake Maintenance is crucial if you've chosen roller brakes for your conversion. Roller brakes require periodic lubrication to function properly. Apply a small amount of roller brake grease to the internal mechanism according to the manufacturer's recommendations. Avoid over-greasing, as this can attract dirt and debris. Inspect the brake shoes for wear and replace them as needed. Disc Brake Maintenance, if you opted for disc brakes, involves several key steps. Check the brake pads for wear and replace them when they are worn down to the minimum thickness. Inspect the rotors for damage or warping and replace them if necessary. Clean the rotors with isopropyl alcohol to remove any contaminants, such as oil or grease. Bleed the brakes periodically to remove air bubbles from the hydraulic system, which can affect braking performance. Another crucial point is Brake Pad Inspection and Replacement. Regardless of the brake system you've installed, regularly inspect the brake pads for wear. Replace the pads when they are worn down to the minimum thickness to maintain optimal braking performance. Worn brake pads can reduce stopping power and damage the rotors or drums. Don’t forget Regular Cleaning. Keep your braking system clean by removing dirt, grime, and debris. Use a mild soap and water solution to clean the brake calipers, levers, and cables. Avoid using harsh chemicals or solvents, which can damage the components. Professional Check-ups are also beneficial. Consider having your brakes professionally inspected and serviced at least once a year. A qualified mechanic can identify potential issues and perform necessary maintenance to keep your braking system in top condition. This is especially important if you're not comfortable performing more complex maintenance tasks, such as bleeding hydraulic brakes. By following these maintenance and care tips, you can ensure that your converted hand brakes function safely and effectively for years to come. Regular maintenance not only prolongs the life of your braking system but also provides you with a more confident and enjoyable riding experience.

Conclusion

Converting your Nexus bike from a pedal-brake system to hand brakes is a significant upgrade that can enhance your riding experience. The transition offers improved control, safety, and versatility, making it a worthwhile investment for many cyclists. By following the steps outlined in this guide, you can successfully convert your bike and enjoy the benefits of hand brakes. Remember, the key to a successful conversion lies in understanding your Nexus hub, selecting the right components, and meticulously following the installation process. Whether you opt for roller brakes or disc brakes, the enhanced braking performance will provide greater confidence on the road. Beyond the initial conversion, regular maintenance and care are crucial to keep your new braking system functioning optimally. Simple tasks like cable and housing inspections, brake lever maintenance, and brake pad replacements will ensure your safety and the longevity of your brakes. Don't hesitate to seek professional assistance if you're not comfortable with certain maintenance procedures. Ultimately, the decision to convert from pedal brakes to hand brakes is a personal one, driven by your riding needs and preferences. If you value enhanced control, improved safety, and greater versatility, then hand brakes are an excellent choice. The ability to modulate your braking force, stop quickly in emergencies, and navigate various terrains with confidence will significantly improve your overall cycling experience. Embrace the change, enjoy the ride, and stay safe!