SwissStop Catalyst One (ISO)

Engineered Silence. Professional Power.

The SwissStop Catalyst One ISO is a 1.95mm thick, high-grade stainless steel rotor designed for the most demanding road, gravel, and mountain bike applications. By utilizing a proprietary asymmetric cutout pattern and a reinforced outer edge, SwissStop has created a rotor that resists warping under extreme heat and eliminates the high-pitched "harmonic resonance" (squeal) that plagues traditional disc systems.

Why the Catalyst One is a Performance Benchmark:

• Optimized Heat Dissipation: The unique "Catalyst" cutout geometry is mathematically mapped to maximize surface area for cooling while maintaining a consistent friction coefficient, preventing brake fade on even the longest alpine descents.

• Whisper-Quiet Braking: Engineered specifically to reduce vibration and harmonic noise. When paired with SwissStop pads, it provides a silent, premium braking experience that matches the highest-end builds.

• Increased Durability (1.95mm Thick): Slightly thicker than standard 1.8mm rotors, providing increased lateral stiffness and a longer service life before reaching the wear limit.

• Consistent Lever Feel: The high-stiffness construction ensures that your brake lever remains firm and predictable, eliminating the "spongy" feel caused by rotor flex during hard 1-finger braking.

• Pad-Saving Design: The smooth, precisely machined edges and balanced cutout ratio are non-abrasive, significantly extending the life of both organic and metallic brake pads.

• Universal ISO 6Bolt Mount: Features the standard 6-bolt interface, making it a "plug-and-play" performance upgrade for almost any mountain or gravel hub.

Technical Specifications:

• Material: High-Tensile SUS410 Stainless Steel

• Mount Type: ISO 6Bolt

• Thickness: 1.95mm (High-Stiffness)

• Weight: Performance-focused (approx. 128g for 160mm)

• UCI Approved: Features rounded edges for professional racing safety.

The Alegro Perspective: In the shop, we call the Catalyst One the "noise killer." If you’ve tried every pad compound and your brakes still howl like a banshee, this rotor is usually the cure. It feels significantly more "solid" than the stock rotors that come on most bikes. If you are a heavier rider or someone who loves technical descending, the extra thickness and stiffness of the Catalyst One provides a level of confidence you just can’t get from a standard stamped-steel rotor.

Surgical Precision. Heat-Defying Strength. Silence your Ride with SwissStop.