Rotors

Durable Engineering for Safer Braking

A-Line air disc rotors are engineered to meet the highest OE standards for durability and dependability under the most demanding conditions on the road.
Every rotor is built with proprietary alloys that exceed ASTM G3500b grey iron for the precise balance of tensile strength, heat dissipation characteristics and thermal wicking.
Inferior rotors are made with porous low grey iron that can trap heat and shorten rotor and pad life. Excessive density in the grey iron can also lead to noise, vibration and harshness during driving.

A-Line uses precise OE specifications to give you the best performance for durability, thermal reduction and ride stability.

PROPRETARY METALLURGY

Creating a long-lasting rotor starts with a precision blend of metallurgy. A-Line’s metallurgical engineers consult with OE teams to determine the best grade of iron alloys for rugged air disc braking applications.
High torque and high-heat applications like those in the air disc environment will create more than 15,000 foot pounds of torque and temperatures that exceed 1,500 degrees F.
Some manufacturers focus on creating high tensile strength rotors that do not wick heat away from the pads. This results in noisey rotors that can trap heat against the pads and shorten pad life.
Others focus on adding Carbon to the rotor to wick heat away. This eliminates noise by softening the rotor, but results in increased rotor wear.

BALANCING CARBON AND TENSILE

Creating an OE-grade rotor requires a precise mix of hardening alloys and carbon so the rotor can be hard enough to withstand high torque, and have thermal wicking properties for high heat applications.

PARALLEL MILLING AND BALANCING

Every A-Line rotor is finished with computer controlled parallel milling and balancing. Parallel milling cuts both faces of the rotor simultaneously to a tolerance of 20 microns or .00078”. This precision milling eliminates disc thickness variation (DTV) that can cause brake judder.
ISO 1940/1 balancing standards are used to ensure that A-Line rotors are balanced to OE specifcations.

GEOMET CORROSION PROTECTION

To extend rotor life and prevent corrosion, A-Line rotors are coated with GeoMet® 360 protection.
This blend of zinc and aluminum oxides interlace and bind to the metal surface so that they are four times more corrosion resistant than zinc-only coatings.
Applied in layers of eight to 10 microns thick, the coating resists more than 30 natural and synthetic corrosives, including:

Rotor Part Numbers