This rotor ring is a direct replacement for Paragon two piece performance rotor PN P2R.012.350.240.20400.02.01.01.R and does not fit your stock vehicle without the two piece rotor hat, unless specifically stated.

Replacement Discs and hardware for BMW M3 (E90/E92/E93) / 1M Coupe (E82) - Rear Pair

These rotor rings (friction rings) are direct replacement for OEM replacement Paragon Performance 2-piece Rotors. Sold in pair. This does not fit the OEM brakes unless you already have the Paragon 2 piece replacement rotors.

Comes with new rotor attachment hardware kits (enough for 2 rotors) and assembly instructions for a complete rebuild.

Paragon Performance Rotor Rings deliver enhanced cooling and braking for track use. Made from high-carbon alloy iron, they resist cracking and heat damage. Their ventilated design improves airflow to keep rotors cool, reducing wear and vibration. Heat-treated and precision machined for durability and smooth pad break-in.

These replacement rear rotors for BMW M3 and 1M Coupe feature tight lateral run-out and precise balancing to minimize vibration. Their slotted design keeps the braking surface clean, enhances heat dissipation, and improves performance in wet conditions by preventing water buildup. Lighter than many original rotors, they reduce unsprung weight, enhancing overall vehicle handling and brake consistency. Tested through strict quality control for reliability and fit.

Part Number: PRK.012.350.240.20400.02.01.R

Best For: BMW Drivers Who Value Sharp Response and Repeatable Braking

These rotors are well matched to BMW applications where steering precision and brake feel are part of the driving experience. They suit daily-driven performance cars, mountain-road use, and occasional HPDE events where repeatable response matters more than flashy claims.

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.