Side-Dumps

  • Styles:
    • We offer side-dumps in many different options. All trailers come in a variety of sizes between 22′ and 36′, with 22′ and 30′ being the most popular. We also make truck-mounted boxes if you have a truck just needing a box; rather than a whole trailer; price includes mounting.
    • We offer tandem or triple axle set-ups on the semi trailers.
    • Ag Pull-Type Trailers can be fitted with generic super single ag tires or large flotation tires.
  • Box:
    • The Rief Design Side-Dumps utilize a square box to allow more trailer capacity, while being a shorter box for ease of handling. It also creates a more stable unload. You can unload up or downhill (within reason) and not tip the side-dump over like other models. The side-walls are made of stainless to increase longevity, avoid corrosion/rust, and to not allow sticking in the winter time. The floor is made of durable 1/2” UHMW plastic. The plastic is to stretch and compress allowing for a durable floor, no matter the material being hauled.
  • Silage Extensions:
    • All trailers can be fitted with 4-sided silage extensions to increase capacity during silage season. The silage sides detach by removing 2 pins and lifting straight up. The driver’s side rotates on top to allow the door to swing upward from the force of the material falling out while the passenger side is mounted solid. The side wall of the spreader box locks and unlocks this in place. See the videos below for some silage action!

RDM Square Box Capacities VS Generic Round Tubs: 

  • 22′ Box: (Similar to a 27′ round tub)
    • Water Level at Door: 17 cu. yds.
    • Strike Off: 26 cu. yds.
  • 24′ Box: (Similar to a 30′ round tub)
    • Water Level at Door: 18.7 cu. yds.
    • Strike Off: 29.4 cu. yds.
  • 30′ Box: (Similar to a 38′-40′ round tub)
    • Water Level at Door: 23.7 cu. yds.
    • Strike Off: 37.1 cu. yds.