Product Overview
The 3721X is a high-performance, heavy-duty brake drum engineered for commercial heavy-duty trucks, offering reliable stopping power, exceptional durability, and precise fitment for demanding highway and vocational applications. Manufactured to OEM-equivalent standards, it is a direct replacement component designed to meet the rigorous braking demands of Class 7-8 trucks.
Core Specifications
|
Part Number |
3721X Webb 61527B Brake Drum 10081079 (Gunite/Accuride OEM equivalent) |
|
Brake Size |
15" diameter x 4" width (standard heavy-duty brake shoe interface) |
|
Material |
Premium-grade cast iron (high tensile strength, excellent heat dissipation) |
|
Mounting Type |
Outboard disc wheel mounting |
|
Weight |
Approx. 79 lbs |
Bolt Configuration
- 10 bolt holes
- Bolt circle diameter: 11.25"
- Bolt hole diameter: 1.00"
Critical Dimensions
|
Brake surface diameter |
15.00" |
|
Brake surface width |
4.78" |
|
Pilot diameter (center hole) |
8.78" |
|
Overall depth |
8.79" |
|
Maximum wear diameter (discard limit) |
15.12" |
Key Features & Benefits
■ Heavy-Duty Construction
Made from high-density cast iron with optimized alloy composition for superior structural integrity and resistance to cracking, warping, and thermal fatigue under extreme braking loads.
Precision CNC machining ensures consistent wall thickness, balanced weight distribution, and perfect concentricity-minimizing vibration and ensuring smooth brake operation.
■ Superior Heat Management
Generous mass acts as a large heat sink, absorbing and dissipating heat generated during repeated heavy braking, effectively reducing heat fade and maintaining consistent braking performance.
Engineered to withstand high-temperature operating conditions common in long-haul, downhill, and stop-and-go vocational use.\
Perfect Fit & Compatibility
- Direct interchange with OEM part numbers (e.g., Gunite 3721X, Mack 3398-3721X, Ford F3HZ1125E, International 9003721X).
- Designed for steer axles and compatible with most standard heavy-duty truck models including Kenworth, Peterbilt, Freightliner, Mack, and International.
- Precision pilot diameter and bolt hole alignment guarantee straightforward installation without modification.
Balanced Performance
- Fully dynamically balanced during manufacturing to reduce wheel-end vibration, extend tire life, and improve driver comfort.
- Matches OEM specifications for Reduced Stopping Distance (RSD) brake systems, ensuring compliance with modern heavy-duty truck safety standards.
Long Service Life
- High wear-resistant casting material extends service intervals and reduces replacement frequency.
- Robust mounting flange and reinforced housing withstand repeated torque loads and harsh road conditions.
- Backed by industry-standard warranty for reliable aftermarket performance.
Applications
- Ideal for a wide range of heavy-duty commercial vehicles:
- Class 7 & 8 heavy-duty trucks (tractor-trailers, semi-trucks)
- Vocational trucks (dump trucks, concrete mixers, refuse trucks)
- Long-haul freight trucks
- School buses & transit buses
- Suitable for both OEM replacement and aftermarket upgrade
FAQS
Why Choose 3721X Brake Drum?
The 3721X 15" x 4" brake drum stands as a top-tier solution for heavy-duty truck braking systems, blending OEM-quality craftsmanship, exceptional durability, and cost-effective performance. It delivers consistent, reliable stopping power in the most demanding operating environments, making it the preferred choice for fleet operators, truck owners, and professional mechanics seeking dependable wheel-end components.
What is the cross reference number?
02-01858, 0201858, 151.3721AX, 151.5401BA, 151.5402BA, 151.5402BATR, 151.5407BA, 1513721AX, 1515401BA, 1515402BA, 1515402BATR, 1515407BA, 1613122C1, 1689468C1, 2605074C1, 3398-3721X, 33983721X, 3721AX, 3721X, 53075018, 54201108, 85123366002, 85123382002, 9000X, E2HZ1125A, F2HZ1125B, F2HZ1125D, F3HZ1125C, F6HT1102YA, K12188, N42A107507, ZBR3721X
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