Reliability that you can grow on!

Since 1987.

Founded in farming country to serve farming people, RJ Equipment is dedicated to practical solutions backed by personal service in agricultural implements.

Seamless dependability with RJ Gravity Grain Boxes

Moving grains to beans to fertilizers, rely on RJ for years of efficient, dependable service

Spend more time harvesting and less time unloading with RJ’s fast-pour hopper design and seamless hi-slip graphite finish.

With all-welded steel body construction, seamless RJ Grain Boxes minimize rust traps to last longer. Get true value with true capacity ratings in RJ quality-built boxes sized from 400 to 725 bushels.

Fast unloading

Our steep-sloped sides let crops and materials slide out quickly in all box sizes; our high-slip graphite finish ensures clean, snag-free unloading – no need for messy sealants.

Safe roading

Quality construction keeps your wagon rolling true on trusted Horst running gear. Add complete light packages to ensure bright visibility and a safe return on late night deliveries.


The industry-preferred RJ rack & pinion grain door mechanism allows reliable, effortless operation every time. The built-in air pocket design prevents awkward seals and jams from forming at the door.

Features & Options

Model Length (ft.) Height* (in.) Width (in.) Body Capacity (Bushels) Weight (empty) (lbs.)
400 15 74 96 12 ga 400 2380
500 15 87 96 12 ga 500 2540
600 17 94 102 12 ga 600 3140
700 20 101 102 12 ga 725 3540

*Height measured from bottom of sill to top of box RJ700 also features steel tubing sills

Standard Features:

  • Seamless fully welded box interior
  • Standard 12-gauge steel body (all sizes)
  • High-strength 8” steel channel sills (RJ700 also features steel tubing sills)
  • Unloading gate 27” x 27” x 3/16”
  • Rack & pinion gate operation; inside “mini-door” eases opening
  • Tapered drop chute
  • Spring-loaded gate lock
  • Steel ladders, front and back
  • Convenient 6” X 12” glass sight windows supplied as standard
  • Hi-slip graphite paint (box interior)

Optional Features:

  • 10-gauge steel body construction
  • RJ Roll tarp assembly package (locks & crank included)
  • Tarp hold-down bracket
  • Shur-Lok Roll Tarp assembly package
  • MOT-compliant trailer light package*
  • Mini-door for easier opening
  • Interior box divider to create two compartments

*Factory installation available

Talk to your RJ Equipment dealer for the experienced advice on specking the grain box that best suits your acreage and harvest plans.

RJ Gravity Grain Box