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The 4707 Brake Lining, coded with FMSI# 4707 and WVA# 19030/33, is a heavy-duty braking solution engineered by Dingchi exclusively for ROR (Roll-on/Roll-off) vehicles and trailers. Designed to handle high-load scenarios, this brake lining supports Gross Axle Weight Ratings (GAWR) of 20,000lbs, 23,000lbs, and even higher, making it ideal for demanding transport operations. Its precision dimensions—including a 419mm drum compatibility, 189.1/194.6mm arc length, 177.8mm width, and 21.2/17.6-20.0/12.0mm thickness—ensure a seamless fit with ROR and trailer braking systems. Compliant with FMVSS 121 (Federal Motor Vehicle Safety Standard 121) testing requirements, it balances smooth braking performance, extended service life, and adaptability to diverse heavy-duty use cases.
Dingchi’s proprietary formulation for the 4707 Brake Lining prioritizes durability and load-bearing capacity. The material resists wear even under continuous heavy braking, reducing the frequency of replacements and lowering maintenance costs. Unlike standard linings, it maintains structural integrity at extreme temperatures, preventing fading or degradation during long-haul trips—critical for ROR vehicles and trailers that often carry bulky or heavy cargo.
Every 4707 Brake Lining is manufactured to exact dimensional standards. The 419mm drum compatibility ensures it aligns perfectly with common ROR/trailer drum sizes, while the variable arc length (189.1/194.6mm) and fixed width (177.8mm) accommodate minor variations in brake system designs without compromising contact. The thickness range (21.2/17.6-20.0/12.0mm) provides flexibility for both new installations and replacement scenarios, ensuring consistent braking force across the lining’s lifespan.
Adherence to FMVSS 121 is non-negotiable for the 4707 model. This compliance means the brake lining meets strict federal safety criteria for stopping distance, heat dissipation, and structural stability—essential for fleet operators and transport companies prioritizing driver and cargo safety. Additionally, the WVA# 19030/33 certification (a global standard for brake components) validates its quality and compatibility with international ROR and trailer models.
ROR vehicles, used for transporting heavy equipment (e.g., construction machinery, trucks) or containers, rely on consistent braking to manage uneven loads. The 4707 Brake Lining’s high GAWR support and wear resistance make it suitable for these vehicles, as it maintains performance even when hauling maximum-weight cargo over long distances or rough terrain.
From flatbed trailers to cargo trailers, the 4707 model adapts to various trailer types. Its FMVSS 121 compliance ensures it meets the safety needs of commercial fleets, while its extended service life reduces downtime for trailer maintenance—critical for logistics companies aiming to minimize operational delays. It is particularly effective for trailers used in regional or national freight transport, where frequent braking (e.g., on highways or urban roads) is common.
The 4707 model is designed to handle GAWR of 20,000lbs, 23,000lbs, and higher. This range makes it suitable for most heavy-duty ROR vehicles and trailers, including those used for industrial or commercial cargo transport.
While optimized for ROR and standard heavy-duty trailers, the 4707 model may be compatible with other trailer types if their drum size (419mm) and braking system dimensions match. We recommend verifying your trailer’s specifications (e.g., drum diameter, arc length requirement) with Dingchi’s technical team before installation.
Its proprietary material formulation resists wear and heat degradation, while precision engineering ensures even contact with the drum—reducing uneven wear spots. Additionally, compliance with FMVSS 121 means the lining is tested for long-term durability, outperforming generic linings that may lack rigorous safety and performance validation.
