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6 x 6 conversions

The Severe Duty F550 6x6 is a dream come true for truck enthusiasts, expedition campers, and military fleets.

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3rd Axle - 6x6 conversion

Gears - 6:17

Wheels - 3 Piece Military Grade Super Singles

Tires - 335/80 R20 Continental (7400 lbs rating)

Fenders - Optional Paint

Speed Correction - Accurate Speed

Lift Kit - 2.5"

Brake Rotors/Pads - Zero Brake Fade

Fox Shocks - Custom Design for F550 Series

Independent or Solid Axle Suspension


CTIS - Central Tire Inflation

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severe duty logotire background.png

6 x 6 conversions Rednering

6 x 6 Brushfire

6x6 Brushfire Conversion with 2 seed twin output 6x2, 6x4, 6x6 transfer case, 40" Toyo 15.5 MT tires, 2 rear drive axles, military proven coil spring 6x6 suspension, ballistic fabrication, Pro 80 drive axle, Ford F550 parts, auburn gear 40 spline electric locker, lockouts, and custom spindle to carry 14,000 capacity, 20x10 internal double beadlocks

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severe duty logotire background.png

Testing the next gearover

Testing the next gearover in 4x6 with round fender look on this 2019

F550 Severe Duty

We at DBL Design are glad to unveil the simple yet robust F550 Severe Duty: 3 axles and 6 wheels. The wheels are 3 piece aluminum and fit for severe duty 2.5 inch lift.

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The godfathers of the 6x6 conversion.


IAG Guardian Armored 6x6 with DBL Design components; Severe Duty military platform

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