Nissan Composite Grey Hat Brake Discs

Brake Discs Features

1. OE-matched for Nissan lineups: Fits Sylphy, X-Trail, 370Z, and Rogue Sport; ECE R90/IATF 16949 certified, supporting direct bolt-on installation without modifications.

2. Composite grey hat structure: High-carbon cast iron friction ring (wear-resistant) + grey anti-corrosion steel hat (resists road salt/ moisture), balancing durability and lightweight.

3. Optimized heat dissipation: Ventilated design (for most models) enhances airflow, reducing thermal fade during frequent stops or downhill driving.

4. Grey hat anti-rust protection: The grey steel hat uses a specialized coating, passing salt spray tests to avoid rust-related degradation.

5. NVH optimization: Non-directional friction surface + damping components minimize braking noise and vibration, maintaining cabin comfort.

Brake Discs Benefits

1. Seamless Nissan system compatibility: Works with VDC and hybrid regenerative braking, preserving the factory braking feel and avoiding "force mismatch."

2. Stable braking for all scenarios: Durable cast iron handles heavy loads (X-Trail full of cargo) and the ventilated design prevents fade in 370Z’s sporty driving.

3. Long service life: Grey hat’s anti-rust coating + wear-resistant friction ring reduce replacement frequency, lowering maintenance costs.

4. Quiet and clean driving: Low noise keeps rides peaceful, and minimal dust keeps Nissan’s alloy wheels tidy.

5. Lightweight advantage: Composite structure cuts unsprung weight slightly, improving overall handling for daily driving.

Safety Performance

The friction ring is manufactured from high-quality grey cast iron. Its microstructure contains a significant number of free graphite flakes. Under the heat generated by braking friction, these graphite flakes are released to the friction interface, forming an extremely thin solid lubricating film. The function of this film is not to reduce braking force, but to stabilise the friction coefficient – it prevents "metal welding" or "stick-slip" phenomena between the disc and pad caused by localised high temperatures, ensuring predictable and consistent deceleration with every brake application. This is the materials science basis for grey cast iron as the classic brake disc material.During emergency or high‑load braking, the brake disc is subjected to enormous braking torque. The composite construction of this product joins the aluminium hat and friction ring through precise connections (such as rivets or bolts) to form a single unit. During braking, the braking torque is transmitted from the friction ring through the connections to the aluminium hat, and then to the hub. This force transmission path requires the connections to possess adequate shear strength, and the mating surfaces between the aluminium hat and friction ring to have sufficient torque transmission capacity. These technical indices are designed and validated according to the load requirements of the vehicle‘s original brake system, ensuring reliable braking force transmission under all operating conditions.

Summary

Safety Performance: Grey cast iron friction ring delivers stable friction coefficient; two‑piece construction delays fade; composite structure ensures reliable braking force transmission.Fitment Precision: Disc thickness, outer diameter, offset, centre bore, and PCD all manufactured to Nissan OEM specifications – fully compatible with original calipers, hubs, and ABS.Durability & Service Life: Grey cast iron resists heat checking; anodized aluminium hat resists corrosion; minimum thickness marking provides a reliable replacement reference.Installation Convenience: All interface dimensions match OEM, direct replacement with no modifications, included installation accessories, ready to fit out of the box.

• 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