RDS 90 Gallon Diesel Auxiliary Tank & Toolbox Combo 1
RDS 90 Gallon Diesel Auxiliary Tank & Toolbox Combo 2RDS 90 Gallon Diesel Auxiliary Tank & Toolbox Combo 3RDS 90 Gallon Diesel Auxiliary Tank & Toolbox Combo 4
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Lead Time:  12-16 Weeks
Ships From: Florida


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Model: RDS-72772
Manufacturer: RDS Manufacturing

This is the RDS 90 Gallon Diesel Auxiliary Tank & Toolbox Combo. Increase driving range with an auxiliary fuel tank with toolbox built in! Auxiliary tanks can be used as additional capacity for a factory tank with the use of an RDS diesel install kit. Shop for better fuel prices with this increased range. Each tank comes with gas cap, drain fittings, manual sight gauge, fuel filler shroud, along with internal baffles to reduce sloshing. Toolboxes come with linked stainless steel locks that also secure the fuel fill to prevent tampering, and two lift cylinders to hold open the crowned lid. All tanks Meet DOT standards.

Diesel Install kits are optionally available. Not intended to be used for gasoline. Made in the U.S.A.

NOTE: For safety reasons, the filler neck of these tanks prevents them from being overfilled. Actual usable tank capacity is about 95% of the total advertised gallons.


  • Special Permit issued by the US Department of Transportation (DOT)
  • Heavy duty 0.125 gauge aluminum diesel tank
  • 0.058 gauge aluminum toolbox
  • 0.187 gauge aluminum mounting brackets
  • Stainless steel locks
  • Built in baffles to reduce movement of contents and sloshing
  • Reinforced lid
  • Pressure tested for leaks
  • Uses include diesel, water, fertilizer oil, bio fuel, combustible fuel
  • Manual fuel sight gauge
  • Enclosed fuel fill area
  • Note: the width of this toolbox is only 20 inches. The width of the tank is 24 inches, so 4 inches of the back of the tank will not be covered by the toolbox.
  • 1 year limited warranty

Please be aware that tanks/toolboxes may have mounting tabs that extend the dimensions of the tank by 1 inch on each side. This is NOT accounted for when viewing the displayed dimensions of the tanks/toolboxes. Please be sure to account for this when measuring for fitment of your tank/toolbox.

Detailed Information

RDS Auxiliary Combo Fuel Tank Sizes

PDF  RDS Auxiliary Tank Installation Instructions
RDS Manufacturing
RDS Manufacturing Warranty Details:

RDS warrants all products to be free of defects in material or workmanship for a period of 1 year from invoice ship date from our warehouse. If upon our inspection we deem the item to be defective, RDS will determine whether to repair or replace the defective item. It is the customers responsibility to ship the item to RDS. No cost for labor, installation, or missing contents will be reimbursed. Damages due to shipping and handling, improper installation, abuse - intentional or accidental, or normal wear and tear are not covered by this warranty. Warranty is void if the tank has been altered.

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