Cobalt Friction Technologies USA

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Cobalt XR-Series Carbon-Ceramic Friction Compounds

Race Engineered. Race Proven.
Cobalt Friction's XR-Series Carbon-Ceramic friction composites represent a significant advancement in the evolution of motorsports brake pad technology. The XR-Series materials have unparalleled consistency and friction stability over the broadest operating temperature range in the industry (50°F to over 1600°F). Furthermore, unlike traditional resin-based compounds, Cobalt XR-Series friction composites do not require bedding/burnishing to achieve optimal performance, and exhibit consistent performance throughout the life of the pad.

XR1 combines a very aggressive initial bite/attack and high sustained torque levels with good modulation/threshold control and release characteristics to deliver unparalleled decelerations rates across a broad range of operating conditions. Cobalt Friction's proprietary Thermo-Velocity Design Profile yields unmatched consistency and torque stability across an extremely broad temperature range, throughout the life of the pad material. Unmatched disc & pad finish/wear for this level of performance. Equally well-suited for vehicles with active aerodynamic profiles as well as limited downforce applications due to the direct line pressure to generated torque relationship.

Compound Characteristics
	Temperature Range	100-1600°F (38-871°C)
	Intial Bite/Attack	Very Aggressive
	Torque Level & Profile	Very High + Fast Ramp
	Modulation	Very Good
	Release	Excellent
	Consistency (across temp. range)	Excellent
	Consistency (throughout pad depth)	Excellent
	Pad Wear & Finish	Very Good (no edge crumbling or chipping)
	Pad Wear Rate-of-Change	< 10.0%-ROC from New-to-End of Life
	Disc Wear & Finish	Excellent (no grooving or cupping)

Typical Applications*
	Sports Car	Grand-Am Rolex Daytona Prototype & GT, Grand-Am Koni Challenge GS & ST, SPEED World Challenge GT & Touring Car, ALMS GT2
	Sports Racer	IMSA Lights, SCCA ASR, CSR, DSR, etc.
	Formula Car/Open Wheel	Indy Lights, IndyCar, Star Mazda, etc.
	Rally & Rallycross	Tarmac and gravel applications
	Club Racing & HPDE	SCCA, NASA, BMWCCA, PCA & PBOC, etc. (GVW over 2600lbs)
*In those series and/or classes which mandate the use of a "spec" brake pad, Cobalt XR-Series materials are used for testing & validation purposes only.

XR2 features a strong initial bite with a controlled transition to a medium-high rising torque profile. Particularly well-suited to chassis/tire combinations or surface conditions which do not respond well to high initial brake energy (or where the XR1 material is too aggressive), but still require high average torque levels. By allowing the tire contact patch to extend and the chassis geometry to stabilize before imparting maximum braking torque, the driver remains in full control throughout the brake zone, from initial pedal application to the final release.

Compound Characteristics
	Temperature Range	100-1600°F (38-871°C)
	Intial Bite/Attack	Aggressive
	Torque Level & Profile	High + Medium-Fast Ramp
	Modulation	Excellent
	Release	Excellent
	Consistency (across temp. range)	Very Good
	Consistency (throughout pad depth)	Excellent
	Pad Wear & Finish	Very Good (no edge crumbling or chipping)
	Pad Wear Rate-of-Change	< 10.0%-ROC from New-to-End of Life
	Disc Wear & Finish	Excellent (no grooving or cupping)

Typical Applications*
	Sports Car	Grand-Am Rolex Daytona Prototype & GT, Grand-Am Koni Challenge GS & ST, SPEED World Challenge Touring Car
	Sports Racer	IMSA Lights, SCCA ASR, CSR, DSR, etc.
	Formula Car/Open Wheel	Star Mazda, etc.
	Rally & Rallycross	Tarmac and gravel applications
	Club Racing & HPDE	SCCA, NASA, BMWCCA, PCA & PBOC, etc. (GVW below 2800lbs)
*In those series and/or classes which mandate the use of a "spec" brake pad, Cobalt XR-Series materials are used for testing & validation purposes only.

XR3 is a highly versatile medium-high torque compound with very good cold performance and high fade resistance. Excellent modulation and wear characteristics make the XR3 the perfect choice for the majority of medium & lower inertia applications with limited brake hardware options. For higher-energy platforms utilizing XR1 or XR2 on the front axle, the XR3 is an excellent rear axle choice to maintain proper brake balance. The XR3 material is particularly well-suited for spec-Miata racing in the front axle.

Compound Characteristics
	Temperature Range	100-1200°F (38-649°C)
	Intial Bite/Attack	Strong
	Torque Level & Profile	Medium-High + Medium Ramp
	Modulation	Excellent
	Release	Excellent
	Consistency (across temp. range)	Excellent
	Consistency (throughout pad depth)	Excellent
	Pad Wear & Finish	Excellent (no edge crumbling or chipping)
	Pad Wear Rate-of-Change	< 5.0%-ROC from New-to-End of Life
	Disc Wear & Finish	Excellent (no grooving or cupping)

Typical Applications
	Sports Car	Grand-Am Koni Challenge GS & ST, SPEED World Challenge Touring Car
	Sports Racer	SCCA ASR, CSR, DSR, etc.
	Club Racing & HPDE	SCCA, NASA, BMWCCA, PCA & PBOC, etc. (GVW under 2800lbs)

XR4 is a medium torque compound sharing the same application basis as the XR3, but at ~10% overall lower torque levels. Slightly rising torque profile at low to moderate line pressures, while transitioning to a virtually flat profile at higher line pressures for unmatched frictional stability in rear axle applications.

Compound Characteristics
	Temperature Range	50-1200°F (38-871°C)
	Intial Bite/Attack	Solid
	Torque Level & Profile	Medium + Low Ramp
	Modulation	Excellent
	Release	Excellent
	Consistency (across temp. range)	Excellent
	Consistency (throughout pad depth)	Excellent
	Pad Wear & Finish	Excellent (no edge crumbling or chipping)
	Pad Wear Rate-of-Change	< 5.0%-ROC from New-to-End of Life
	Disc Wear & Finish	Excellent (no grooving or cupping)

XR5 is a highly specialized low-medium torque compound designed for rear-axle applications in vehicles exhibiting rapid and high levels of weight transfer under braking (e.g. front wheel drive touring cars). Solid initial bite and a flat torque profile which transitions to a slightly negative slope during the last 60-75% of a brake zone eliminates rear lock-up.

Compound Characteristics
	Temperature Range	50-1000°F (38-871°C)
	Intial Bite/Attack	Solid
	Torque Level & Profile	Low-Medium + Negative Ramp
	Modulation	Excellent
	Release	Excellent
	Consistency (across temp. range)	Excellent
	Consistency (throughout pad depth)	Excellent
	Pad Wear & Finish	Excellent (no edge crumbling or chipping)
	Pad Wear Rate-of-Change	< 5.0%-ROC from New-to-End of Life
	Disc Wear & Finish	Excellent (no grooving or cupping)