BRAKE DISC (SINGLE) DF4274S

Product Overview

The TRW DF4274S Brake Disc (Single) is a high‑performance braking component engineered for rear applications in a wide range of passenger vehicles, including models from Renault, Nissan, and Dacia. Designed with precision machining and advanced material composition, this disc delivers consistent stopping power, superior heat dissipation, and long‑term durability under demanding driving conditions.

Key Technical Specifications

• Diameter: 240 mm (9.45 in)
• Thickness: 8 mm (0.315 in)
• Material: High‑grade cast iron with a reinforced steel core for enhanced strength.
• Heat Capacity: Optimized to manage high thermal loads, reducing brake fade during prolonged use.
• Surface Finish: Smooth, factory‑treated surface that promotes optimal pad contact and reduces noise.
• Compatibility: Fits rear wheel assemblies on a broad spectrum of models such as the Renault Megane II, Clio III Grandtour, Nissan Note, and others listed in the product catalog.

Design Features That Enhance Performance

The DF4274S incorporates several engineering innovations that set it apart from standard aftermarket discs:

• Optimized Rim Geometry: The rim is engineered to provide a larger contact area with brake pads, improving heat transfer and reducing the likelihood of overheating.
• Ventilation Slots: Strategically placed slots allow air to flow through the disc, enhancing cooling efficiency during high‑speed braking.
• Reinforced Core: A steel core reinforces the cast iron rim, providing additional structural integrity and resistance to warping under extreme temperatures.
• Surface Treatment: The disc’s surface is treated with a proprietary coating that reduces friction noise and extends pad life by minimizing wear on both components.

Installation Guidelines

Proper installation is critical to achieving the full performance benefits of the DF4274S. Follow these steps for optimal results:

1. Remove Existing Disc: Carefully detach the current brake disc, ensuring that all mounting bolts are fully loosened and the caliper is supported.
2. Clean the Hub: Use a brake cleaner to remove grease, dust, and debris from the wheel hub and mounting surface.
3. Align the Disc: Position the new DF4274S onto the hub, aligning it with the mounting holes. Verify that the disc is centered and free of wobble.
4. Tighten Bolts: Secure the disc using the manufacturer’s torque specifications to avoid over‑tightening or under‑tightening, which can lead to uneven wear.
5. Reinstall Caliper: Mount the caliper back onto the new disc, ensuring that the brake pads are correctly positioned and that the caliper piston is fully seated.
6. Brake Fluid Check: Inspect the brake fluid level and quality. Replace if necessary to maintain optimal hydraulic performance.
7. Test Drive: Conduct a short test drive at low speeds, gradually increasing speed while monitoring braking response and noise levels.

Maintenance Tips for Longevity

To preserve the integrity of the DF4274S and maintain peak braking performance, adhere to these maintenance practices:

• Regular Inspection: Check the disc surface for cracks, scoring, or uneven wear every 10,000 km.
• Pad Replacement Coordination: Replace brake pads concurrently with any significant disc wear to ensure balanced braking dynamics.
• Avoid Overheating: When driving in mountainous terrain or during extended downhill descents, use engine braking and moderate pedal pressure to prevent excessive heat buildup.
• Keep the Disc Clean: Use a brake brush and mild solvent to remove road grime, especially after long trips or exposure to wet conditions.

Compatibility Matrix

The DF4274S is engineered for rear wheel applications across several vehicle families. Below is an illustrative compatibility list (not exhaustive):

Performance Benefits

Drivers who install the DF4274S can expect:

• Consistent Stopping Power: The disc’s material composition and geometry provide reliable braking across a range of temperatures.
• Reduced Brake Fade: Enhanced heat dissipation keeps brake pads cooler, maintaining performance during repeated stops.
• Lower Noise Levels: Surface treatment minimizes squeal and chatter, contributing to a quieter driving experience.
• Extended Component Life: The reinforced core and durable rim reduce the frequency of replacements for both discs and pads.

Why Choose TRW?

TRW is a globally recognized leader in automotive safety components. Their commitment to rigorous testing, quality control, and continuous innovation ensures that each DF4274S disc meets or exceeds industry standards for performance and reliability.

Conclusion

The TRW DF4274S Brake Disc (Single) represents a blend of advanced engineering, robust materials, and meticulous design. Whether you’re restoring an older vehicle or upgrading a modern compact car, this disc delivers dependable braking performance, superior heat management, and long‑term durability that drivers can trust.