Buick Floating Rear Brake Discs

Built with precision by Chinese manufacturers, Buick's floating rear brake discs enhance braking precision through their floating design. Custom-engineered for Buick's rear braking systems, they perfectly fit mainstream models including LaCrosse, Regal, Enclave, and GL8. Developed in strict adherence to Buick's original equipment (OE) specifications, the product features mounting holes and dimensions perfectly matched to rear brake calipers. It requires no modification for direct installation and is compatible with ABS/ESP and electronic parking systems, suitable for diverse scenarios including business commuting, family travel, and long-distance cruising.

Featuring an HT250 high-strength cast iron rotor body paired with a 6061 aluminum alloy floating ring, it undergoes an integrated forging and heat treatment process. Its impact resistance and wear durability are tailored to Buick models' weight characteristics. Core features include a floating structure with dual-spiral ventilation chambers. The floating ring automatically compensates for brake clearance via floating pins, while 32 equidistant air channels enhance heat dissipation by 35% compared to standard rear brake discs. Continuous braking achieves over 30% thermal fade suppression, maintaining a stable friction coefficient between 0.38 and 0.42. Additionally equipped with a cathodic electrophoretic anti-corrosion coating, it forms a dense protective layer. After 500 hours of salt spray testing, no significant corrosion was observed, making it suitable for humid, coastal, and other highly corrosive environments.

Craftsmanship details highlight quality: The disc body undergoes five-axis CNC precision grinding, controlling end-face runout error within 0.02mm. Combined with a floating ring damping structure and high-precision dynamic balancing calibration, brake resonance noise is reduced to below 42 decibels, meeting Buick's business cabin quietness requirements. Laser-textured friction surfaces create micron-level micro-patterns that rapidly disperse water and brake dust, enhancing wet-road braking stability. Precise coating-to-friction surface zoning ensures uniform wear, meeting Buick's demanding commercial and family-use requirements with an urban service life of 80,000-100,000 kilometers.

• 100% critical dimensions, runout and DTV inspection 

• Material physical and chemical inspection

• Test shear strength, compressibility, density, flatness and parallelism 

• Test performance and noise/NVH