Brakes

Quick Summary

Proper bedding is the single most important step after installing carbon ceramic brakes. The procedure deposits an even transfer layer of pad material onto the rotor surface, establishing the friction interface that delivers optimal stopping power, smooth operation, and maximum rotor lifespan. This guide provides AME Motorsport's recommended bedding procedure, explains the science behind it, and covers the differences between CCB and CCM specifications.

Why Bedding Matters: The Science of Transfer Layer Formation

When a brake pad presses against a rotor, friction is not generated by direct material-on-material contact in the way most people imagine. Instead, the friction interface depends on a thin layer of pad compound material that is transferred from the pad to the rotor surface during the bedding process. This transfer layer -- typically only a few microns thick -- is what actually generates the friction force that decelerates the vehicle.

Without a properly formed transfer layer:

• Friction is unpredictable. Stopping power varies from one application to the next because the pad-to-rotor interface is inconsistent.
• Brake vibration develops. Uneven pad deposits create thickness variation on the rotor, which is felt as pulsation through the brake pedal.
• Rotor wear accelerates. Without a uniform transfer layer acting as a buffer, the pad compound contacts the rotor surface unevenly, causing localised wear.
• Noise occurs. Squealing and grinding are common symptoms of an incomplete or absent transfer layer.

Proper bedding creates a uniform, stable transfer layer that delivers consistent friction, smooth operation, and even wear. It is not optional -- it is essential engineering procedure. Whether you have just installed carbon ceramic rotors on a Porsche 992 GT3, a BMW M2/M3/M4 G-Series, or a Lamborghini Huracan, the bedding process is your first and most important responsibility as the owner.

AME Motorsport Recommended Bedding Procedure

The following procedure is AME Motorsport's standard recommendation for bedding carbon ceramic brake rotors with street and dual-purpose pad compounds. This procedure applies to both CCB and CCM rotors unless otherwise noted.

Before You Begin

• Confirm installation. Verify that all brake components are correctly installed, torqued to specification, and free of contamination. See our installation and maintenance guide for detailed installation procedures.
• Choose a safe location. You need a stretch of road where you can safely perform repeated moderate-speed stops without endangering yourself or others. A low-traffic industrial area or a private road is ideal.
• Check conditions. Dry pavement is essential. Do not attempt bedding in wet conditions, as water interferes with transfer layer formation.
• Start with cold brakes. Begin the procedure with the braking system at ambient temperature.

Step 1: Initial Heat Cycling (Gentle Warm-Up)

Perform 5-8 gentle stops from approximately 50 km/h.

Apply moderate brake pressure -- roughly 30-40% of maximum pedal force. The goal is to gradually raise brake temperature and begin the initial pad-to-rotor contact conditioning.

Allow the vehicle to accelerate back to 50 km/h between each stop. You do not need to come to a complete stop during this phase -- decelerating to approximately 10 km/h is sufficient.

Purpose: This phase gently heats the pad and rotor, evaporating any residual manufacturing compounds and beginning the transfer process without thermal shock.

Step 2: Progressive Bedding (Core Procedure)

Perform 15-20 moderate stops from 60-80 km/h.

Apply firm braking pressure -- approximately 60-70% of maximum pedal force. Decelerate to approximately 10-15 km/h. Do not come to a complete stop, as holding the pad stationary against a hot rotor can imprint a localised deposit.

Maintain approximately 30-second intervals between stops. This means accelerating back to speed and immediately beginning the next braking application. The short interval maintains rotor temperature in the optimal range for transfer layer formation.

You may notice a slight change in brake feel during this phase. The pedal may become firmer, and the initial bite may sharpen. This is a positive indication that the transfer layer is forming.

Purpose: This is the core bedding phase. The repeated thermal cycling and friction contact progressively builds a uniform transfer layer across the entire rotor friction surface.

Step 3: Cool-Down

Drive at moderate speed for 5-10 minutes without applying the brakes more than necessary.

Allow the entire braking system to cool gradually. Avoid coming to a complete stop and sitting with the brake pedal depressed, as this can create a hot spot where the pad is in contact with the stationary rotor.

Purpose: Gradual cooling allows the transfer layer to stabilise and bond to the rotor surface.

Step 4: Gentle Break-In Period (500 km)

For the first 500 km after the bedding procedure, drive with moderate braking.

Avoid sustained hard braking, extended mountain descents, or track driving during this period. Normal spirited driving is fine -- the goal is to avoid extreme thermal events while the transfer layer fully matures.

After 500 km of normal driving, the braking system is fully bedded and ready for any use case, including track driving.

CCB vs CCM Bedding Differences

While the fundamental bedding procedure is the same for both AME Motorsport rotor specifications, there are some nuances specific to each.

CCB (SiC Coated) Bedding Notes

The SiC coating on CCB rotors provides a harder, more wear-resistant surface. This surface is slightly less porous than uncoated carbon ceramic, which means:

• Transfer layer formation may take slightly longer. You may need to lean toward the higher end of the 15-20 stop range during the core bedding phase.
• Initial bite develops progressively. CCB rotors tend to improve their bite characteristics over the first 200-300 km as the transfer layer fully develops. Do not judge final braking performance during the first few drives.
• The SiC layer is very tolerant of the bedding process. It is difficult to damage the coating through normal bedding procedure, making CCB rotors forgiving for first-time carbon ceramic owners.

CCM (Uncoated) Bedding Notes

CCM rotors present the raw carbon ceramic surface, which has different characteristics:

• Transfer layer forms more quickly. The slightly more porous surface accepts pad material readily. The lower end of the 15-20 stop range is usually sufficient.
• Surface sensitivity is higher. Uneven or excessive pad deposits are more likely to cause issues on CCM rotors. Follow the procedure precisely and avoid excessive pressure during the initial heat cycling phase.
• Temperature sensitivity during bedding. CCM rotors benefit from a slightly more conservative approach during the warm-up phase. Spend a few extra stops at lower speeds before progressing to the core 60-80 km/h bedding cycle.

Pad Compound Bedding Requirements

Different brake pad compounds have different bedding requirements. The procedure above is a general guideline, and you should also follow any compound-specific instructions provided with your pads.

Street and Dual-Purpose Compounds

Most street-oriented and dual-purpose compounds bed in well with the standard procedure described above. These pads are formulated with organic and metallic friction materials that deposit readily onto the rotor surface. The standard 15-20 stop procedure at 60-80 km/h is typically sufficient.

Track-Focused Compounds from Barbaro Racing

Barbaro Racing track compounds are formulated for high-temperature performance and may require a more aggressive bedding cycle. For these pads:

• Increase the braking speed to 80-100 km/h during the core bedding phase.
• Apply firmer pressure (70-80% of maximum).
• Expect a longer break-in period before the pads reach full performance. Track compounds often need 20-30 stops and may continue improving over the first few track sessions.

NetzschRacing Compounds

NetzschRacing pads are designed with specific carbon ceramic compatibility. Follow the standard AME Motorsport bedding procedure, but pay particular attention to:

• Maintaining consistent intervals between stops. NetzschRacing compounds benefit from steady thermal cycling rather than irregular applications.
• Completing the full 500 km break-in period before track use. These compounds develop their optimal friction characteristics gradually.

For comprehensive pad compound recommendations, see our guides on brake pad compounds explained and best brake pads for carbon ceramic rotors.

Common Bedding Mistakes and How to Avoid Them

Mistake 1: Coming to a Complete Stop During Bedding

Why it is a problem: When you bring the vehicle to a full stop during the bedding process, the hot brake pad sits stationary against the hot rotor. Pad material deposits in a concentrated patch at that single point, creating an uneven transfer layer. This manifests as brake vibration and pulsation. How to avoid it: Always keep the vehicle rolling during the bedding stops. Decelerate to 10-15 km/h, then accelerate again. If you must stop (traffic light, intersection), apply only light brake pressure and release as soon as possible.

Mistake 2: Insufficient Pressure During the Core Phase

Why it is a problem: Light, tentative braking does not generate enough heat or friction force to effectively transfer pad material to the rotor. The result is a thin, incomplete transfer layer that provides inconsistent friction. How to avoid it: Apply firm, deliberate braking pressure during the core bedding phase. Approximately 60-70% of maximum pedal force. You should feel the car decelerating assertively. This is not the time for gentle, barely perceptible braking.

Mistake 3: Using the Brakes Hard Before Completing the Procedure

Why it is a problem: Hard braking on a rotor without a fully formed transfer layer causes uneven pad deposits and can glazing the pad surface. Once glazed, the pad is less effective at depositing material, and the bedding process stalls. How to avoid it: Follow the progressive structure of the procedure. Warm up gently, progress to firm bedding stops, and do not apply full braking force until the 500 km break-in period is complete.

Mistake 4: Bedding in Wet Conditions

Why it is a problem: Water on the rotor surface interferes with the transfer layer formation process. Steam generation at the friction interface disrupts the pad material deposit and can cause uneven transfer. How to avoid it: Only perform the bedding procedure on dry pavement. If it starts raining during the procedure, stop and resume when conditions improve.

Mistake 5: Skipping the Bedding Procedure Entirely

Why it is a problem: Some drivers assume that carbon ceramic rotors will perform optimally from the first stop. Without bedding, the friction interface is raw material-on-material contact without the transfer layer that provides consistent, predictable friction. The result is poor initial performance, premature vibration, and potential long-term surface damage. How to avoid it: Always perform the bedding procedure. It takes approximately 30 minutes of driving time and is the single highest-return investment you can make in your braking system's performance and longevity.

Signs of Successful Bedding

After completing the bedding procedure and the initial 500 km break-in period, a properly bedded braking system will exhibit:

• Consistent initial bite. The brakes engage smoothly and predictably with each application.
• Linear pedal feel. Braking force increases proportionally with pedal pressure, without sudden grab or unexpected release.
• Absence of vibration. No pulsation or judder through the brake pedal during normal or hard braking.
• Even rotor appearance. The rotor friction surface should have a uniform, slightly matte or lightly glazed appearance without visible hot spots or uneven discolouration.
• Quiet operation. No squealing, grinding, or unusual noise under normal braking conditions. Some light noise during very gentle, low-speed application is not unusual and does not indicate a problem.

What Happens If You Skip Bedding

Drivers who skip or improperly execute the bedding procedure typically experience one or more of the following symptoms:

• Brake vibration and pulsation. The most common symptom of uneven pad deposits. Felt as a shuddering sensation through the brake pedal and sometimes the steering wheel.
• Inconsistent stopping power. Braking performance varies unpredictably, with some applications feeling strong and others feeling weak.
• Increased brake noise. Squealing, groaning, or metallic grinding during braking.
• Accelerated pad and rotor wear. Without the protective transfer layer, both the pad and rotor surface wear faster than designed.
• Reduced confidence. Perhaps the most significant consequence -- a braking system that does not feel predictable undermines driver confidence.

If you are experiencing these symptoms and suspect an incomplete bedding procedure, the situation can often be corrected by re-bedding. Install fresh pads (the old pads may have developed a glazed surface) and perform the full bedding procedure from scratch.

For additional guidance on brake system troubleshooting, see our articles on brake fade causes and prevention and how to bed in brake pads.

Temperature Monitoring During Bedding

For drivers who want to optimise the bedding process, temperature monitoring provides valuable data. While not strictly required, knowing rotor temperatures helps you stay within the ideal bedding window.

Recommended Temperature Ranges During Bedding

• Warm-up phase: 50-150 degrees Celsius
• Core bedding phase: 200-400 degrees Celsius
• Maximum during bedding: Do not exceed 500 degrees Celsius

Monitoring Methods

• Infrared thermometer. An IR temperature gun can be aimed at the rotor surface immediately after stopping. This gives a point-in-time reading that is useful for confirming you are in the right temperature range.
• Thermal paint or temperature strips. Applied to the rotor hat or outer edge, these indicate the maximum temperature reached during the session.
• Onboard sensors. Some vehicles have brake temperature monitoring systems that provide real-time data.

For track preparation including temperature monitoring equipment, see our track day brake preparation guide.

Professional vs DIY Bedding

DIY Bedding

The bedding procedure described in this guide is designed to be performed by any competent driver. You do not need special equipment, professional facilities, or track access. A safe stretch of dry road and 30 minutes of time are all that is required.

AME Motorsport encourages owners to perform the bedding procedure themselves. Understanding how your braking system behaves during this critical phase builds familiarity and confidence that serves you well in everyday driving.

Professional Bedding

Some owners prefer to have the bedding procedure performed by a professional installer. This is particularly relevant for:

• Vehicles with complex driver assistance systems that may interfere with the repeated braking pattern required for bedding.
• Owners who do not have access to a suitable road for performing the procedure safely.
• Vehicles where the brake installation was performed by a professional and the owner prefers a turnkey solution.

AME Motorsport's network of approved installers can perform both installation and bedding as a complete service. For information on installation and professional support, see our installation and maintenance guide.

Frequently Asked Questions

How long does the bedding procedure take?

The active bedding procedure (warm-up, core bedding stops, and cool-down) takes approximately 30 minutes of driving time. The subsequent 500 km break-in period occurs during normal driving and requires no special effort beyond avoiding extreme braking events. Most drivers accumulate 500 km within one to two weeks of regular driving.

Can I drive normally before completing the bedding procedure?

You can drive normally between starting the bedding procedure and completing the 500 km break-in period. Normal driving -- including spirited street driving -- is perfectly acceptable. The only restriction is to avoid sustained hard braking, aggressive track driving, or extended high-heat situations during this period. If you need to make an emergency stop, do so without hesitation -- safety always takes priority over bedding protocol.

What if I installed new pads on already-bedded carbon ceramic rotors?

When changing pad compound on existing rotors, a modified bedding procedure is recommended. The old transfer layer from the previous pad compound should be replaced with a new layer from the fresh compound. Follow the standard procedure, but you may find that fewer stops are needed during the core phase because the rotor surface is already conditioned. The 500 km break-in period still applies.

Do I need to re-bed after the rotors have been sitting for a long time?

No. Carbon ceramic rotors do not corrode, so there is no surface rust to clear after extended storage. If the same pads are installed, the transfer layer remains intact and the brakes should perform normally from the first application. This is a significant advantage over cast iron rotors, which develop surface corrosion during periods of inactivity and require a brief re-conditioning cycle before performing optimally.

Can improper bedding permanently damage carbon ceramic rotors?

In most cases, improper bedding causes temporary performance issues (vibration, inconsistent bite, noise) that can be resolved by re-bedding with fresh pads. However, extreme cases of uneven pad deposition -- particularly if the vehicle is then driven hard on track without correcting the issue -- can lead to localised thermal damage. Following the procedure correctly the first time is always the best approach.