Holst Trailer Sales is a family owned and operated dealership serving Southeast Idaho and surrounding areas since 2015. We offer quality trailers from top brands like Big Tex, Diamond C, Aluma, Cargo Express, Formula, Wells Cargo, and ATC. Along with trailer sales, we provide parts, service, repair, and installation for brakes, wiring, hitches, accessories, and more. Our experienced service team is committed to keeping your trailer safe, reliable, and on the road long after the sale. From routine maintenance to repairs and upgrades, we take pride in fast turnaround times, quality workmanship, and dependable customer care. Our team is dedicated to honest pricing, expert support, and helping you find the perfect trailer for your needs.

The Diamond C Baseline HDU is a rugged, work-ready dump trailer built to handle daily hauling of gravel, dirt, debris, and construction materials. Designed with Diamond C’s proven dump geometry and structural integrity, the HDU delivers reliable dumping performance while keeping ownership cost competitive. It’s a straightforward, no-nonsense dump trailer built for contractors, landscapers, and property owners who need dependable functionality without unnecessary complexity.

• Model: Baseline HDU – Heavy Duty Dump Trailer

• GVWR: 14,000 – 16,000 lbs (configuration dependent)

• Available Lengths: 14′, 16′

• Bed Width: 82″

• Side Height: 20" - 36" (+6" Board and Bracket)

• Pull Type: Bumper Pull

• Tires: Radial trailer tires with steel wheels

• Heavy-Duty I-Beam Frame: Designed to withstand repeated dumping cycles and heavy material loads.

• Crossmember Reinforcement: Optimized spacing for improved bed support and longevity.

• Diamond Plate Fenders: Durable, functional, and built to handle jobsite abuse.

• 3-Stage Telescopic Hydraulic Cylinder: Provides strong, consistent lift for full-bed dumping.

• Gravity-Down System: Simple, reliable operation with fewer components to maintain.

• Multifunction Gate (Barn / Spreader Gate): Allows for controlled material release or full open dumping.

• Stake Pockets & Board Brackets: Expand side height for higher-volume hauling when needed.
  
  
• 20' Heavy Duty Mesh Tarp: Great for load containment.

• Electric Drum Brakes: Forward self-adjusting for consistent braking performance.

• Breakaway System: DOT-compliant safety braking system.

• LED Lighting: Fully sealed LED lights for improved visibility and durability. Sealed wiring harness

• Diamond C Difference Maker (DM) Powder Coat: Multi-step coating process for corrosion resistance and long-term durability.

• Standard Color Options: Onyx Black or Carbon Metallic Gray, Clean, professional appearance suitable for commercial branding.

Contractors, landscapers, farmers, and property owners needing a dependable dump trailer for soil, gravel, demolition debris, and general material hauling.

Check out the Baseline HDU