Alcon Replacement Rotors 365mm x 32mm (14.37" x 1.26") - P.C.D. 235mm - 12x6.4mm Mounting - D50

We have two options for replacement of these Alcon designed rotors. For racing and high performance use we recommend the Alcon/Pro-Systems replacement rotor. For a more affordable version we carry Paragon Performance Rotors.

Alcon/Pro Systems versions are machined at our facility in Mooresville, North Carolina from specially formulated grey cast iron providing the best in thermal stability, friction coefficient and heat transfer characteristics. These rotors are Dyno-bedded after being precision machined. Dyno-bedding ensures the most reliable and stable rotor the moment you put it on the car. This also helps reduce or eliminate the potential for brake shudder due to improper bedding. These rotors are made to order and will take 4-6 weeks to deliver.

Used in the highest level of motorsports including Daytona Prototypes, GT, and TransAm you are guaranteed the best rotor for your braking needs.

Paragon Rotors are made of CM-250 special formulated high carbon alloy cast iron, it allows for an optimal bite, thermal characteristics, high-temperature strength and durability. Rotor rings are heat treated to release stress in the rotor to avoid deformation and vibration then turned by state-of-the-art CBN surface machining to ensure better break-in with new brake pads. These rotors offer solid performance on a budget and go through rigorous quality control procedures and inspections to ensure the rotor rings are fit for their purposes. These rotors take 2-3 weeks to deliver.

Additional information:

Floating 2-piece rotors allow thermal expansion of the rotor while minimizing deformation and ensuring the rotor is self-centered with the pads. Slotting improves braking consistency by maintaining a clean contact surface and dissipate heat generated and gases released when the pads come into contact with the rotors. Slotted rotors have a superior advantage over blank rotors in wet or raining conditions by preventing water films to form between the brake pad and rotor surface. We do not offer drilled rotors as these will almost always crack over time requiring replacement much earlier.

Weight Savings. Two piece rotors weigh less than most O.E. rotors while maintaining proper thermal capacity, this improves overall handling by saving unsprung mass.

Directional ventilation vanes for optimal cooling performance and increased resistance to cracking. Run up to 30% cooler than O.E. rotors and increase cooling efficiency of heat removal.

Extra/replacement hardware is available for purchase. We recommend using new hardware when replacing rotors to ensure the rotor ring is attached to the aluminum hat properly. Please refer to our Rotor Assembly Instructions for torque specs and detailed instructions.

SKU: ROR.365.2570.320.23500.03.01.L/R

Best For: Audi and VW Performance Street Cars

These rotors are ideal for Audi and VW owners who want confident fitment, crisp brake response, and better heat management for spirited street driving. They are especially well suited to MQB and other modern VAG performance platforms that see a mix of commuting, backroad driving, and occasional track use.

FAQ

Do these fit the factory rotor hats?
These rotor rings fit Paragon hats, or the original equipment hats when the vehicle came with a factory 2-piece rotor design. If your application uses a 1-piece factory rotor, these are not intended to bolt to an OE hat because there is no separate hat to reuse.

Are these complete rotors or replacement rings?
These are replacement rotor rings only. They are designed to service the braking surface while reusing the existing hat when the hat is compatible.

Do slotted rotors improve braking?
Slots primarily improve pad cleaning and help maintain consistent braking feel under heat. They do not create a dramatic change in stopping distance by themselves, but they can help the system stay more consistent during repeated hard stops.

When should rotor rings be replaced?
A practical wear indicator is slot depth. When the slots become shallow and much less visible, the rotor is typically nearing the end of its effective service life. Rotor thickness, heat checking, cracking, and brake vibration should also be inspected during service.

Should I replace pads at the same time?
Yes, in most cases. Fresh pads help the new rotor surface bed in correctly and reduce the chance of uneven deposits, noise, or inconsistent pedal feel.

Brake Rotor Technology

Why high-carbon rotors matter
High-carbon cast iron offers better thermal stability than generic low-cost rotor materials. That helps the rotor maintain more consistent behavior as temperature rises, which is important on heavier vehicles and on cars driven aggressively.

Directional vane cooling
Directional internal vanes are designed to move air through the rotor more effectively, improving heat evacuation and helping the rotor recover more quickly between braking events.

Slotted rotor surface
Slots help keep the pad face clean by clearing away gases, dust, and debris. The result is more consistent pad contact and more repeatable braking feel, especially when the system is worked hard.

When to Replace Rotor Rings

Rotor rings should be replaced when the friction surface shows meaningful wear, heat fatigue, or thickness loss. One of the easiest visual indicators is the depth of the rotor slots. As the rotor wears, the slots become shallower. When they are much less visible, the rotor is generally nearing the end of its useful service life.

Other common signs include visible heat checking or cracking, brake pulsation, heavy scoring, and rotor thickness approaching the service limit.

Why Replace Rotor Rings Instead of the Whole Rotor?

On vehicles that use 2-piece rotors, the friction ring can be replaced independently from the hat. That allows the wear component to be serviced without replacing the full assembly, which can reduce replacement cost while preserving the benefits of the 2-piece design.

Common Mistakes When Replacing Rotors

• Reusing worn pads on a fresh rotor surface
• Skipping the pad and rotor bedding process
• Not cleaning or inspecting the hat, hardware, and mounting faces
• Ignoring brake fluid condition during brake service
• Ordering the wrong configuration for the vehicle or hat type

Taking care of these details helps the new rotor deliver the braking feel, wear life, and consistency it was designed to provide.

Recommended Companion Parts

Rotor service is also a good time to inspect or replace the brake pads, rotor hardware where applicable, and brake fluid. On performance applications, fresh pads and fluid often have as much impact on brake feel as the rotor itself.

Need help confirming fitment or choosing the right supporting parts?
Our team specializes in performance brake systems and can help you choose the right combination for your vehicle and how you use it.