Brakes

Quick Summary

AME Motorsport offers two distinct carbon ceramic rotor technologies -- CCB (SiC coated) and CCM (uncoated) -- built on the same core material but optimised for different priorities. This deep technical comparison explains the engineering behind each, their performance characteristics across temperature ranges, wear behaviour, pad compatibility, and real-world applications, helping you choose the right specification for your driving profile.

The Foundation: Same Core, Different Surface

Every AME Motorsport carbon ceramic rotor -- whether CCB or CCM -- begins with the same core material: a carbon fibre reinforced silicon carbide composite (C/SiC). This material is manufactured through a process that infiltrates a carbon fibre preform with molten silicon, which reacts with the carbon to form silicon carbide within the fibre matrix. The result is a composite that combines the lightweight properties of carbon fibre with the hardness and thermal stability of silicon carbide.

This core material is what gives all AME Motorsport carbon ceramic rotors their fundamental advantages:

• Approximately 60% lighter than cast iron at equivalent dimensions
• Operating temperature capacity exceeding 1,400 degrees Celsius
• Complete corrosion immunity (validated through 240-hour salt spray testing)
• Service life measured in hundreds of thousands of kilometres

The difference between CCB and CCM lies entirely in the surface treatment of the friction face -- the area where the brake pad makes contact.

CCB: The SiC Coated Specification

What the Coating Is

CCB rotors feature a dedicated silicon carbide (SiC) surface coating applied to the friction faces. This coating exceeds 0.8 mm in thickness and is metallurgically bonded to the carbon ceramic core. It is not a spray-on treatment or a thin film -- it is a substantial, engineered wear surface that becomes an integral part of the rotor structure.

How It Is Manufactured

The SiC coating is applied through a controlled high-temperature process after the core rotor body is manufactured. The coating material infiltrates the surface layer of the carbon ceramic, creating a gradient interface between the coating and the core. This gradient bond ensures the coating does not delaminate under thermal cycling or mechanical stress.

The manufacturing process is tightly controlled to ensure uniform coating thickness, consistent surface hardness, and absence of defects. Every CCB rotor undergoes dimensional inspection and non-destructive testing to verify coating integrity before it is approved for sale.

Performance Characteristics

Wear resistance. The SiC coating provides approximately 5x the wear resistance of uncoated carbon ceramic. This is the defining advantage of CCB -- the coating acts as a sacrificial barrier that absorbs abrasive interaction with the brake pad, protecting the core material beneath. For street applications, this translates to exceptional rotor longevity, with service life potentially exceeding 300,000 km. Cold bite. The SiC surface provides confident initial friction from ambient temperature. One of the historical criticisms of carbon ceramic systems has been poor cold performance -- the sensation that the brakes do not "wake up" until they reach operating temperature. AME Motorsport's CCB coating directly addresses this, delivering a level of cold bite that is comparable to a high-quality cast iron rotor. Friction coefficient profile. CCB rotors produce a friction coefficient that builds progressively with temperature. From cold through to approximately 600-700 degrees Celsius, the friction coefficient rises steadily, giving the driver a predictable and confidence-inspiring brake pedal. Above this range, friction remains stable and well within the usable envelope for aggressive street and track driving. Brake dust. The SiC coating significantly reduces brake dust production. The harder coating surface sheds less material than uncoated carbon ceramic, and the pad wear rate is lower due to the smoother interface. The resulting dust is lighter in colour and far less corrosive than cast iron brake dust, keeping wheels clean for longer. Noise characteristics. CCB rotors tend to produce less noise than CCM, particularly in low-speed, low-temperature applications such as parking manoeuvres or gentle urban braking. The smoother coating surface reduces the high-frequency excitation that causes brake squeal.

CCM: The Uncoated Specification

What the Surface Is

CCM rotors present the raw carbon ceramic composite surface as the friction face. There is no additional coating -- the C/SiC matrix that forms the core of the rotor is also the surface that interfaces with the brake pad. This is the same material composition used in professional motorsport applications where maximum friction performance is the overriding priority.

Performance Characteristics

Peak friction coefficient. Without the intermediary SiC coating layer, the CCM surface allows a more direct, aggressive interaction between the pad compound and the carbon ceramic matrix. With track-oriented pad compounds, this produces a higher peak friction coefficient at elevated temperatures compared to CCB. For a driver on circuit, this translates to measurably shorter braking distances and higher deceleration rates during sustained hard driving. Thermal performance at extremes. CCM rotors are optimised for the sustained high temperatures encountered in motorsport and aggressive track use. At temperatures above 700 degrees Celsius -- where many braking systems begin to struggle -- CCM maintains strong, consistent friction. The uncoated surface dissipates heat directly through the carbon ceramic matrix without any thermal interface from a coating layer. Transfer layer interaction. The slightly more porous surface of uncoated carbon ceramic accepts pad material transfer readily, forming a robust friction interface quickly. With aggressive track compounds, this creates a high-energy transfer layer that delivers maximum stopping power. The trade-off is that this interface is more sensitive to pad compound selection -- using the wrong pad with CCM can lead to suboptimal transfer layer formation. Brake dust. CCM rotors produce more brake dust than CCB, particularly when paired with aggressive track compounds. The dust is still far less than cast iron, but it is more noticeable than with the coated specification. For a dedicated track car where wheel cleanliness is a low priority, this is irrelevant. For a daily driver where presentation matters, CCB is the better choice. Wear rate. Without the 5x wear-resistant SiC coating, CCM rotors wear at a higher rate than CCB under equivalent conditions. The difference is most pronounced with abrasive track pads and sustained high-temperature operation. For a vehicle used exclusively on track, CCM rotor life is still measured in tens of thousands of kilometres -- dramatically longer than any cast iron alternative. For mixed-use vehicles, CCB's superior wear resistance makes it the more cost-effective choice over the long term.

Technical Comparison Table

Performance at Different Temperature Ranges

Understanding how CCB and CCM behave across the temperature spectrum helps explain why each is suited to different applications.

Cold to Warm (Ambient to 200 degrees Celsius)

This is the temperature range of normal street driving -- commuting, urban driving, gentle highway cruising.

CCB excels here. The SiC coating provides immediate, confident bite from cold. The friction coefficient is predictable and the pedal feel is linear. This is a critical advantage for a daily driver, where the first brake application of the day needs to inspire confidence. CCM performs adequately in this range but does not reach its full potential. The raw carbon ceramic surface needs some temperature to develop optimal friction. In practice, this means the first few stops on a cold morning may feel slightly less aggressive than with CCB. The difference is subtle and manageable, but it is perceptible to a sensitive driver.

Moderate (200 to 500 degrees Celsius)

This is the range of spirited street driving, mountain roads, and the early stages of a track session.

Both specifications perform well in this range. CCB and CCM produce strong, stable friction with good pedal feel. The differences between the two are minimal at moderate temperatures, and most drivers would find either specification fully satisfactory.

High (500 to 800 degrees Celsius)

This is sustained track driving territory -- multiple hard braking zones per lap, repeated over many laps.

CCM begins to show its advantage at the upper end of this range. The direct carbon-to-pad interface, combined with aggressive track compounds, delivers a higher peak friction coefficient than CCB. This translates to shorter braking distances and higher deceleration rates under sustained hard use. CCB remains strong and predictable throughout this range. The SiC coating does not fade or lose effectiveness. For all but the most demanding track applications, CCB provides more than adequate performance. The difference between CCB and CCM at these temperatures is measurable on a data logger but may not be perceptible to most drivers.

Extreme (800+ degrees Celsius)

This is the domain of professional motorsport and the most aggressive track driving.

CCM is the clear choice for sustained operation at these temperatures. The uncoated surface handles extreme thermal loads with maximum efficiency, and the pad compounds designed for this temperature range (dedicated motorsport compounds) are optimised for the CCM surface. CCB can handle occasional excursions into this range without damage, but it is not optimised for sustained operation at these extremes. If your vehicle regularly reaches these temperatures, CCM is the appropriate specification.

Pad Compatibility

CCB Pad Compatibility

The SiC coating provides broad compatibility with a wide range of pad compounds:

• Street pads: Low-dust, low-noise compounds designed for daily driving. Excellent compatibility with CCB.
• Dual-purpose pads: Compounds that balance street comfort with track performance. The natural partner for CCB on a dual-use vehicle.
• Track pads from Barbaro Racing: Fully compatible with CCB. The SiC coating handles the higher friction demands of Barbaro's track compounds while maintaining controlled wear rates.
• NetzschRacing compounds: Designed with specific carbon ceramic compatibility. Work well with the CCB surface across a wide temperature range.

This broad compatibility is one of CCB's key advantages. Owners can switch between street and track pads without concern about rotor compatibility.

CCM Pad Compatibility

CCM rotors are more sensitive to pad compound selection:

• Street pads: Compatible, but may not provide optimal transfer layer formation. CCM works best when it reaches temperatures higher than typical street driving generates.
• Dual-purpose pads: A reasonable choice for mixed-use CCM applications, though CCB is generally the better option for this use case.
• Track pads from Barbaro Racing: This is the ideal pairing for CCM. Barbaro's track-oriented compounds are formulated to work with the raw carbon ceramic surface at elevated temperatures, delivering maximum deceleration performance.
• Dedicated motorsport compounds: CCM is the rotor of choice for the most aggressive racing compounds, which are designed to operate at extreme temperatures where the uncoated surface delivers peak friction.

For detailed pad recommendations for each rotor specification, see our comprehensive guide on best brake pads for carbon ceramic rotors.

The Decision Guide: Which Specification Is Right for You?

Choose CCB If:

• Your vehicle is a daily driver. The superior cold bite, lower dust, reduced noise, and extended wear life make CCB the clear choice for any vehicle driven regularly on the street.
• You do both street and track driving. CCB delivers more than enough thermal capacity for aggressive track days while maintaining the street-friendly characteristics you need for everyday use. This is the most popular configuration among AME Motorsport customers.
• Clean wheels matter to you. The reduced dust production of CCB keeps wheels presentable between washes, which is a meaningful benefit for vehicles like the Porsche 992 Turbo S, BMW M3/M4 G-Series, or Mercedes-AMG G63.
• Maximum rotor longevity is a priority. The 5x wear resistance of the SiC coating delivers the longest possible service life, making CCB the best long-term value proposition.
• You want flexibility in pad compound selection. CCB's broad compatibility means you can choose pads based on your priorities (low dust, low noise, track performance) without worrying about rotor compatibility.

Choose CCM If:

• Your vehicle is a dedicated track car. If the car lives on a trailer and its primary purpose is circuit driving, CCM's higher peak friction at extreme temperatures delivers a measurable performance advantage.
• You run a motorsport programme. Competitive motorsport demands maximum deceleration performance, and CCM with dedicated racing compounds delivers the highest available friction coefficient at sustained high temperatures.
• Absolute braking performance is your overriding priority. If you are willing to accept more dust, less cold bite, and shorter rotor life in exchange for the highest possible deceleration rates at race temperatures, CCM is the right choice.
• You use aggressive motorsport pad compounds. The most aggressive racing compounds are designed for the uncoated carbon ceramic surface and deliver their best performance on CCM rotors.

The Most Common Choice

For the majority of AME Motorsport customers, CCB is the recommended specification. Most performance vehicle owners use their cars on the street the majority of the time, with track days as an enjoyable addition to their driving life rather than the primary purpose. CCB is engineered for exactly this usage pattern -- exceptional daily performance with genuine track capability.

Vehicles across AME Motorsport's range, from the Audi RS3 to the Ferrari 488 to the Lamborghini Huracan, are available in CCB specification.

Price: Identical for Both Specifications

An important point that distinguishes AME Motorsport's approach: CCB and CCM are priced identically for each vehicle application. The choice between coated and uncoated is purely a technical decision based on your driving profile -- there is no financial incentive to choose one over the other.

This pricing philosophy reflects AME Motorsport's Technology for Everyone ethos. The engineering team has optimised both specifications for their intended applications, and the pricing ensures that every customer can choose the right technology for their needs without compromise.

Real-World Feedback: How Owners Use Each Specification

CCB Owners

The typical CCB owner uses their vehicle as a spirited daily driver with periodic track days. Feedback consistently highlights:

• The transformation in daily driving quality. Reduced unsprung weight improves ride, steering, and handling in ways that are immediately noticeable during normal driving.
• Wheel cleanliness. Owners frequently cite the reduction in brake dust as one of the most visible daily benefits, particularly on dark-coloured wheels.
• Confidence in all conditions. The reliable cold bite and predictable pedal feel across all temperatures gives owners confidence regardless of weather or driving situation.
• Long-term value. Owners who have covered significant mileage report minimal rotor wear, validating the long-term cost-of-ownership advantage.

Vehicles that are popular in CCB specification include the Porsche 718/981 Boxster and Cayman, Audi RS4/RS5, BMW M5 F90, and Porsche 997 Turbo/GT3.

CCM Owners

The typical CCM owner runs a dedicated track car or a vehicle that spends the majority of its time on circuit. Feedback centres on:

• Braking performance under sustained load. CCM owners consistently report that the braking system remains strong and predictable throughout long track sessions, even in demanding conditions.
• Compatibility with aggressive compounds. The CCM surface works harmoniously with dedicated track pads, delivering the high-energy friction interface that competitive driving demands.
• Durability under extreme use. Even under track conditions that would destroy cast iron rotors in a single event, CCM rotors maintain their structural integrity and performance consistency.

Popular CCM applications include the McLaren 720S/765LT, Porsche 991 Turbo S/GT3, and Ferrari 458.

Installation and Bedding Considerations

Both CCB and CCM use the same mounting hardware and installation procedure for each vehicle application. AME Motorsport's kits are bolt-on replacements designed to integrate seamlessly with factory brake systems.

The bedding procedure differs slightly between CCB and CCM. The SiC coating on CCB may require a slightly longer bedding cycle to fully establish the transfer layer, while the more porous CCM surface typically beds in more quickly. Both specifications require a 500 km break-in period after the initial bedding cycle.

For complete installation guidance, see our installation and maintenance guide. For the detailed bedding procedure, see our carbon ceramic brake bedding guide.

Frequently Asked Questions

Can I switch from CCB to CCM (or vice versa) on my vehicle?

Yes. Because both specifications use the same core material and identical mounting hardware, switching between CCB and CCM is straightforward. You would replace the rotors and perform a fresh bedding procedure with your chosen pad compound. Some owners start with CCB for daily use and later add a set of CCM rotors for dedicated track weekends, swapping as needed. For details on the complete guide to carbon ceramic brakes, see our comprehensive overview.

If the price is the same, why would anyone choose CCM over CCB?

Because CCM is not an inferior product -- it is a different optimisation. For dedicated track and motorsport applications, the uncoated surface with aggressive pad compounds delivers a measurably higher peak friction coefficient at sustained high temperatures. A driver whose primary concern is maximum deceleration performance on circuit will extract more from CCM than from CCB. The coating adds wear resistance and cold-bite convenience, but it also introduces a layer between the pad and the core material. For extreme performance applications, that direct contact is preferred.

Does the SiC coating on CCB ever wear through?

The SiC coating exceeds 0.8 mm in thickness and is designed to last the service life of the rotor. Under normal street and dual-use conditions, the coating will remain intact for 150,000 km or more. Extreme track use with highly abrasive compounds will wear the coating more quickly, but this is why CCM exists -- for applications where the coating would be consumed faster than the rotor body, the uncoated specification is the appropriate choice.

Are there any vehicles where only one specification is available?

AME Motorsport offers both CCB and CCM for the majority of its vehicle applications. For specific availability, check the product page for your vehicle on the AME Motorsport website. Both specifications are available for popular platforms including Porsche, BMW, Audi, Mercedes-AMG, Ferrari, Lamborghini, and McLaren.

How do I know which specification my vehicle currently has?

If your vehicle is equipped with AME Motorsport carbon ceramic rotors, the specification (CCB or CCM) is indicated on the rotor itself and in the documentation provided at the time of purchase. Visually, CCB rotors have a smoother, more uniform friction surface with a subtle sheen from the SiC coating, while CCM rotors have a more textured, matte appearance characteristic of the exposed carbon ceramic matrix. If you are unsure, contact AME Motorsport or your installing dealer for confirmation.