SwissStop Catalyst Pro rotor 6 hole

Ready for any use

At the beginning of 2015, the SwissStop engineering team carried out a series of laboratory tests on brake discs for bicycles. The engineers then constructed digital models of these rotors and simulated the same test conditions with highly developed software. The data comparison confirmed that the simulations were accurate and effective, after which a number of digital prototypes were developed, thoroughly tested and evaluated.

New design - better performance

The heat transfer in the individual models was measured extensively with the help of simulation software. Based on the respective relationship between convection, radiation, surface and weight, the optimal design was determined in order to achieve maximum heat dissipation and strength with minimum weight. The structure of each design was evaluated using braking forces ranging from normal hand strength to the theoretical maximum. Critical pressure points in the structure were identified in order to maximize the strength and rigidity of the rotor.

With the help of CFD simulations (Computational Fluid Dynamics), the air flow over the rotor surface and through the cut-outs was measured. A selection of profiles was tested to determine the effects of asymmetrical slots and to optimize the cooling effect of the airflow on the surfaces. The thermodynamic simulations, structural analyzes / material analyzes and fluid dynamic visualizations were carried out in cooperation with the institute of the University of Applied Sciences, HSR in Rapperswil.

The final design was confirmed and visualized using further thermal and structural simulations. A two-piece design consisting of a spider (7075-T6 aluminum alloy) and a SUS410 stainless steel friction ring was chosen to strike the right balance between light weight, reliable heat control and structural performance.

The laboratory test of the Catalyst Disc Rotor confirmed the results of the technical simulations. In the endurance test, the Catalyst delivered outstanding results. While conventional braking systems wear out over time and the material ultimately fails (fading), the Catalyst offers a braking torque that remains constant over the long term. Further tests showed extremely effective heat management, significantly shorter braking distances, very little wear and tear, and structural durability under heavy braking. Overall, the Catalyst outperformed the current market-leading models.

Through practical tests with prototypes, the development team determined the optimal relationship between two essential but contradicting characteristics: braking performance and weight. A few carefully measured extra grams of material on the outer ring immediately resulted in shorter braking distances. Engineers added material to certain rotor sizes to further improve performance and durability.

properties

P100005008
Material: stainless steel
Construction: 2-part
Attachment: 6-hole
Material fastening screws: steel
Diameter: 140mm
Lining thickness: 1.85mm

P100005009
Material: stainless steel
Construction: 2-part
Attachment: 6-hole
Material fastening screws: steel
Diameter: 160mm
Covering thickness: 1.80mm

P100005010
Material: stainless steel
Construction: 2-part
Attachment: 6-hole
Material fastening screws: steel
Diameter: 180mm
Covering thickness: 1.90mm

P100005011
Material: stainless steel
Construction: 2-part
Attachment: 6-hole
Material fastening screws: steel
Diameter: 203mm
Pad thickness: 1.95mm

P100006046
Material: stainless steel
Construction: 2-part
Attachment: 6-hole
Material fastening screws: steel
Diameter: 220mm
Pad thickness: 1.95mm

Highlights

• The original Catalyst brake discs that set new standards for performance and durability
• Two-part construction
• The aluminum spider ensures increased rigidity
• The friction ring thickness is optimized and specific for each diameter
• The sizes 140 to 203mm are approved by the UCI
• Used by top road MTB and cyclocross teams
• Compatible with organic and sintered brake pads - we recommend using SiwssStop EXOTherm2 or RS pads

Technologies used

In this chapter we explain the technologies that the manufacturer uses for this product.

Powerful and durable
Powerful braking and high durability, available in five sizes for all applications from road to cyclocross, cross country and downhill to e-bikes. Different material thicknesses depending on the rotor diameter, targeted use of material at significant points and a friction ring made of SUS410 stainless steel increase braking performance and longevity at the same time.

Approved for road racing by the UCI
On January 1st, 2017 the Union Cyclist Internationale (UCI) started the 2nd test run for disc brakes in road cycling. The brake discs must not have any 90 ° edges on the outside. The SwissStop Catalyst discs have been approved for road racing due to their rounded edges on the outside.

Practical wear indicators
Three small holes on each side of the rotor indicate exactly when the brake disc should be replaced.

scope of delivery

• 1 x SwissStop Catalyst Pro brake disc (see item description for details)
• 6 x fastening screws