Swissstop eTap AXS 35 Rs Disc Pads

For cyclists who demand the utmost from their braking systems, understanding the nuances of brake pad technology is paramount. Swissstop, a name synonymous with high-performance cycling components, offers a range of brake pads designed to optimise stopping power, modulation, and longevity. Among their offerings, the Swissstop eTap AXS 35 Rs disc brake pads stand out as a premium choice, specifically engineered to complement SRAM's electronic shifting systems and deliver an exceptional braking experience. This article delves into what makes these pads a noteworthy upgrade for discerning riders.

Understanding Disc Brake Pad Technology

Before we dive into the specifics of the Swissstop eTap AXS 35 Rs, it's beneficial to grasp the fundamental principles of disc brake pads. Disc brake pads are the crucial interface between your brake lever's hydraulic or mechanical force and the braking surface of your rotor. They are typically constructed from a friction material bonded to a metal backing plate. The friction material is what generates the heat and force to slow your bicycle down. The choice of friction material significantly impacts braking performance, including:

• Stopping Power: The initial bite and maximum deceleration capability.
• Modulation: The rider's ability to precisely control the braking force, allowing for smooth and gradual speed adjustments.
• Heat Dissipation: How effectively the pad manages and sheds heat generated during braking, which is critical for preventing brake fade.
• Durability: The lifespan of the pad, influenced by material composition and riding conditions.
• Noise: The audible feedback produced during braking, often related to vibration.

The Swissstop eTap AXS 35 Rs: A Closer Look

The "35 Rs" designation in the Swissstop eTap AXS 35 Rs brake pads signifies a specific compound and intended application. Swissstop uses a letter-based system to categorise their compounds, with 'R' often referring to a specific performance characteristic, such as enhanced heat resistance or a particular braking feel. The "eTap AXS" part of the name clearly indicates their compatibility and intended integration with SRAM's electronic groupsets, particularly those featuring AXS technology.

Compound Composition and Performance Characteristics

While Swissstop doesn't always disclose the exact proprietary blend of their compounds, they are known for utilising high-quality materials. The 35 Rs compound is generally understood to be a performance-oriented organic or semi-metallic compound. These types of compounds typically offer:

• Excellent Modulation: Riders often praise Swissstop pads for their predictable and progressive feel, allowing for fine-tuned braking control. This is particularly important for gravel riding, road racing, or technical descents where precise speed management is key.
• Good Initial Bite: The pads provide a confident and responsive initial engagement when the brake lever is applied.
• Quieter Operation: Compared to pure metallic pads, organic or semi-metallic compounds tend to be quieter, reducing annoying squeals and rattles, especially in dry conditions.
• Rotor Compatibility: They are generally less abrasive on brake rotors than some harder metallic compounds, potentially extending rotor life.
• Consistent Performance: Swissstop compounds are engineered for reliable performance across a range of temperatures and weather conditions.

Why the "eTap AXS" Designation?

The explicit mention of "eTap AXS" suggests that these pads have been developed with the specific characteristics of SRAM's electronic braking systems in mind. While most disc brake pads are cross-compatible to a degree, manufacturers sometimes fine-tune their pads to work optimally with specific brake calipers and lever systems. This could relate to:

• Pad Shape and Fit: Ensuring a perfect fit within SRAM's AXS brake calipers for optimal contact and reduced vibration.
• Braking Response: Tuning the compound's friction characteristics to complement the responsiveness of electronic shifting and braking actuation.
• Heat Management: Potentially designed to work harmoniously with the heat management features integrated into SRAM's higher-end brake systems.

Benefits of Upgrading to Swissstop eTap AXS 35 Rs

Swapping out your stock or worn-out brake pads for a premium option like the Swissstop eTap AXS 35 Rs can yield significant improvements in your riding experience. Here are some key benefits:

Enhanced Stopping Power and Control

The primary reason to upgrade is to achieve superior stopping power and finer control. The 35 Rs compound, combined with the precise actuation of eTap AXS, allows for more confident braking, especially in demanding situations like steep descents or emergency stops. The improved modulation means you can brake harder without locking up your wheels, leading to safer and more efficient riding.

Reduced Brake Fade

Brake fade, the loss of braking power due to overheating, can be a serious safety concern. Swissstop's compounds are known for their ability to manage heat effectively. While organic compounds can be more susceptible to fade at extreme temperatures than metallic ones, Swissstop's engineering aims to minimise this effect, ensuring more consistent performance on long descents or during repeated braking.

Quieter Braking

If you're tired of noisy brakes, the 35 Rs compound is likely to offer a quieter braking experience. The organic or semi-metallic nature of the compound generally produces less friction-induced vibration, resulting in a more pleasant and less distracting ride.

Increased Durability and Longevity

While specific longevity depends on riding conditions (e.g., muddy trails vs. dry roads), high-quality compounds are designed to last. Swissstop prioritises durability, ensuring that you get a good lifespan out of your investment. Proper bedding-in procedures and maintenance will further enhance their longevity.

Optimised for eTap AXS Systems

For riders already invested in SRAM's eTap AXS ecosystem, these pads offer a way to further optimise their existing setup. The specific tuning for these systems ensures that you're getting the most out of your high-tech components.

Installation and Bedding-In

Proper installation and bedding-in are crucial for achieving the best performance from any brake pad. While it's always recommended to consult your bike manufacturer's manual or a professional mechanic, here's a general overview:

Installation Steps:

1. Safety First: Ensure your bike is securely stable, ideally in a bike stand.
2. Remove Wheel: Detach the wheel that houses the caliper you're working on.
3. Remove Old Pads: Carefully remove the old brake pads from the caliper. This usually involves removing a retaining pin or clip.
4. Clean Caliper: It's a good opportunity to clean any debris from inside the caliper body.
5. Insert New Pads: Slide the new Swissstop eTap AXS 35 Rs pads into the caliper. Ensure they are oriented correctly according to the caliper design.
6. Reinstall Retaining Pin: Secure the new pads with the retaining pin or clip.
7. Check Pad Alignment: Ensure the pads are aligned with the rotor. You may need to adjust the caliper position or gently spread the pistons if the pads are too tight against the rotor.
8. Reinstall Wheel: Put the wheel back onto the bike.
9. Test Brakes: Gently squeeze the brake lever a few times to ensure the pistons are engaging the pads correctly and that there are no obstructions.

Bedding-In Procedure:

Bedding-in, or burnishing, is essential to transfer a thin layer of pad material to the rotor surface, creating a uniform braking surface for optimal performance. This process helps prevent noise and ensures maximum stopping power.

• Find a Safe Area: Locate a flat, open area with no traffic.
• Accelerate and Brake: Accelerate to a moderate speed (e.g., 15-20 mph).
• Apply Brakes Firmly: Apply one brake firmly, slowing down significantly but without coming to a complete stop. Repeat this 10-15 times for each brake.
• Repeat with Higher Speed: If possible and safe, repeat the process with slightly higher speeds and firmer braking, but avoid locking the wheels.
• Cool Down: Allow the brakes to cool down completely between sets of braking applications.
• Avoid Full Stops: During the bedding-in process, try not to come to a complete stop with the brakes applied, as this can create uneven deposits.

A proper bedding-in can take 10-20 stops to achieve optimal performance.

Frequently Asked Questions

Are Swissstop eTap AXS 35 Rs compatible with all SRAM AXS brakes?

They are designed for SRAM AXS systems, but it's always best to check the specific caliper model and the pad shape. Swissstop usually provides compatibility charts on their website. Generally, they will fit SRAM's common road and gravel calipers.

Are these pads suitable for wet weather?

The 35 Rs compound offers good performance in various conditions. While all brake pads may see a slight reduction in initial bite in very wet conditions, Swissstop's compounds are engineered to provide reliable stopping power even when wet. Metallic pads might offer slightly better wet performance but often sacrifice modulation and noise.

How often should I replace my brake pads?

Brake pad life varies significantly based on riding style, terrain, weather, and maintenance. Inspect your pads regularly. When the friction material wears down to about 1mm or less above the backing plate, it's time for replacement. You'll also notice a decrease in braking performance or increased lever travel.

Can I use these pads with carbon rotors?

The 35 Rs compound is typically designed for use with standard steel rotors. Using organic or semi-metallic pads on carbon rotors is generally acceptable, but always consult the rotor manufacturer's recommendations. Some very aggressive metallic compounds can be too abrasive for carbon rotors.

Conclusion

The Swissstop eTap AXS 35 Rs disc brake pads represent a significant upgrade for any cyclist using SRAM AXS electronic groupsets who prioritises braking performance, modulation, and a quiet ride. Their carefully engineered compound offers a superb balance of stopping power and control, making them an excellent choice for road, gravel, and even some cross-country mountain biking applications. By understanding their technology and ensuring proper installation and bedding-in, riders can unlock the full potential of their braking system and enjoy a safer, more confident cycling experience.