Lightweight Full Cast Brake Drum 3922X | 15.00" x 4.00" for Medium & Heavy-Duty Trucks
Product Overview
Our 3922X Brake Drum is a high-performance, lightweight full-cast solution engineered for North American commercial vehicles. Designed for a 15" x 4" braking system, the 3922X is the industry standard for front steer axles and specific trailer configurations where weight reduction and heat management are paramount.
Manufactured from high-carbon G3000 grey iron, this drum offers superior thermal conductivity and resistance to heat checking. The 3922X model is specifically optimized to reduce unsprung weight, helping fleet operators improve fuel efficiency and increase payload capacity without sacrificing braking safety or structural integrity.
Technical Specifications
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Attribute
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Detailed Specification
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Industry Part Number
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3922X / 3922
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Brake Size
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15.00" x 4.00" (381mm x 102mm)
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Mounting Type
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Outboard
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Bolt Hole Count
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10 Holes
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Bolt Circle Diameter (PCD)
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11.25" (285.75mm)
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Pilot Diameter (Center Hole)
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8.78" (223mm)
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Overall Depth
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8.82" (224mm)
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Brake Surface Width
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4.63"
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Material Grade
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Premium G3000 Grey Cast Iron
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Weight
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Approx. 72 lbs (32.7 kg) - Lightweight Series
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Vehicle Compatibility
The 3922X Brake Drum is a universal replacement for many North American Class 7 and Class 8 truck brands:
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Truck Brands: Freightliner, Kenworth, Peterbilt, International (Navistar).
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Axle Brands: Compatible with Meritor, Dana (Spicer), and Eaton steer axles.
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Application: Primarily used on Front Steer Axles and specialized lightweight trailer axle setups.
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Cross-Reference & Interchange
This brake drum is a direct interchangeable replacement for the following industry part numbers:
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Gunite: 3922X, 3922
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Webb: 7358, 7358B (Reference size compatibility)
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Meritor: 53-123533-002, 123533
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Dayton: 123533
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Haldex: 3922X
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Fleetrite: FLT3922X
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Key Benefits
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Enhanced Payload Capacity: The 3922X is engineered to be significantly lighter than standard 15x4 drums, allowing fleets to maximize cargo weight and improve MPG.
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Superior Heat Sink Capability: The premium G3000 iron metallurgy absorbs and dissipates heat quickly, reducing the risk of "brake fade" during repetitive stops.
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Precision Dynamic Balancing: Every drum is pre-balanced to eliminate wheel vibration, protecting your steer axle components, hub seals, and tires.
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Full Cast Durability: Unlike composite alternatives, our one-piece full cast design ensures uniform expansion and superior structural rigidity under high-stress braking.
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FAQ
Q1: Is the 3922X interchangeable with the 7358 drum?
A: While they share the same 15" x 4" brake size and 8.78" pilot diameter, the 3922X is the lightweight version. Always check your vehicle's weight requirements and overall depth (8.82") for a perfect fit.
Q2: Can this drum be used on a drive axle?
A: No. The 3922X is a 4-inch wide drum typically designed for steer axles. Drive axles usually require 7-inch or 8.625-inch wide drums.
Q3: How do you prevent the drum from rusting during shipment?
A: All our drums are treated with a specialized industrial anti-rust coating and are moisture-wrapped before being secured on reinforced pallets for international transit.
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