Cross-Drilled Rotors
SP Performance Cross-Drilled Rotors have a design that offers the best results possible in cooling and venting brake dust and moisture. Unlike our competition there is no sharp edge on our chamfer. This is accomplished by the use of an outer radius curve rather than a countersink. With the radius curve, or "Sinusoid Curve", it virtually eliminates an edge on the surface of the hole. This smooth surface also makes the rotor more pad friendly by reducing the wear of the pad caused by the friction scraping against a sharp edge

Cross-Drilled Rotor

With Gray Coating

Standard Gray ZRC Finish:

All rotors are provided with our gray ZRC coating.  It provides long-lasting protection against corrosion in the most hostile salt-water environments.  After being applied, ZRC provides the highest level of galvanic protection. The film of ZRC is conductive. After the coating heats up during use, it bonds permanently to the metal surface. It will not allow the metal to corrode, even when the surface is scratched

Cross-Drilled Rotor Plated

Bright Silver Plating

Optional Bright Silver Plating: 

Electro- plating is performed on our rotors to provide a brighter finish which is more appealing to the look of the rotor. When plating a rotor, a metallurgical bond is formed between the plating and steel, forming an iron rich alloy with tenacious bond where it will form its own protective oxide layer. Electro- plating is very effective in combating the corrosion of the rotor.

 

Advantages of SP Cross-Drilled Rotors

  • Increased cooling

  • Improved brake pad bite

  • Improved wet weather braking

  • Reduced fade

  • Increased Safety and Reliability

Sinusoid Curve Chamfer

                   

The constant heating and cooling of the brake rotor can cause heat checking. The sharp edges on the hole or countersink creates a stress point, increasing the possibility of a crack formation.

Straight Drilled Hole 

A high stress and heat build up area forms at the intersection of the rotor and drilled edge.

Countersunk Hole 

Countersinking increases the external surface area of the hole, thus reducing heat, but still contains edges prone to stress and heat build up.

Radius Hole 


The Radius Chamfer increases the hole cooling area thus reducing heat, but still contains sharp edges. 

SP *Sinusoidal Curved Chamfered  Hole 

Absolutely no sharp edges. The smooth design promotes cooling and minimizes stress, reducing the possibility of heat checking while increasing both rotor and pad life.