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The Perfect Balance of Wildland and Interface Functionality

The WUI merges the high-clearance capability of the Model 34 Type 3 Wildland with the functionality, exceptional handling, and storage capacity of the Model 18 Type 1 Interface. It’s the perfect balance of capabilities made to lead a revolution in wildland engineering and design.

A 1500-GPM pump, with a foam and deck gun, provide additional structure protection capability. A diesel-driven pump supports pump-and-roll operations. The system incorporates two front bumper lines, two lines on each side of the truck, dual rear lines, a cross-lay bed, two booster reels and connections for relay pumping. An optional Ahrens-Fox MadDogxl Compressed Air Foam System, available in three ratings ranging up to 200-CFM, is also available. Ground sweep nozzles on the front bumper, allowing the truck to operate in Black or Red Zones. 

Ground clearance, clean cab, and body designed to climb and move through wildland obstacle with ease

Built on an HME Ahrens-Fox custom, high-clearance SFO® 4x4 chassis, the WUI is designed to climb over off-road wildland obstacles that stop other apparatus in their tracks. An extreme tight-turn radius also allows the AF-WUI to negotiate twisting two-tracks and mountain trails with ease. Its 96” wide MFD-XL cab enhances crew comfort for high-mileage operations common in extended wildland operations. Super Single, or dual rear tire configurations, with optional automatic tire inflation systems, provide optimal float over a wide range of terrain and surfaces. A flat roof, free of obstructions, allows access under overhanging obstacles. A tough, corrosion-resistant Type 1 Interface body provides ample storage for specialized Wildland and Interface tools, gear and equipment.


Click here to view a 3d Virtual Tour of the Ahrens-Fox WUI



  • Merges Type 3 Wildland, Type 1 Interface, and HXR™ design and functionality
  • HME Ahrens-Fox SFO® 4x4 Chassis developed specifically for rugged wildland and interface applications
  • Engine rating: 360-HP @2600 RPM, 800 lb ft @ 1800-RPM
  • Marmon Herrington 2-speed transfer case to provides low range for off-road control
  • Tires: Michelin 444-50R22.5 low profile super singles, dual rear tires available
  • Incorporates Glass Screen Technology™ touch-screen pump controls
  • 1500-GPM PTO driven pump
  • 500-gallon water tank
  • 150-GPM diesel pump supports pump-and-roll operations
  • MadDogxl automatic CAFs System is available in three ratings from 60 up to 200 CFM
  • 30-gallon foam tank
  • Two booster reels on top
  • 45-cubic feet of hosebed storage
  • Corrosion resistant-stainless steel body featuring aircraft-quality, modular construction
  • Bumper mounted ground sweep nozzles
  • SFOMFDxl 96-inch wide Cab enhances crew comfort
  • Flat roof line clear of obstructions
  • Hard top compartment covers
  • 149-cubic feet of rescue equipment and tool storage
  • Dual 7-cubic feet out-of-county storage compartments
  • Incorporates extreme off-road lighting packages
  • Whelen V-Series™, combination 180° warning and perimeter Lights
  • Cab steps, cab, and compartment LED lighting offer selective red or white options