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Trailer Specs
Stock Number: 12985
Condition: New
Year: 2026
Manufacturer: Diamond C
Model: FMAX 210
Axles: 2
Length: 40'
Width: 8.5'
Height:
GVWR: 25K
Features: Max Ramps
"More Trailer For Your Money"
8.5 x 40 Diamond C FMAX 210 25K Equipment TrailerReady To Work!
Max Ramps

The Diamond C FMAX 210 is the "Gold Standard" of high-end goosenecks, representing the entry point into their heavy-duty tandem dual series. While other manufacturers use standard hot-rolled I-beams, the FMAX 210 is built using Diamond C’s patented Engineered Beam technology, making it stronger, lighter, and more efficient than anything else in the 25,000 lb GVWR class.

KEY STANDARD FEATURES

Dual Wheel & Tire Package

To support its heavy payload, the FMAX210 comes standard with a tandem dual-wheel configuration.

  • Tires: ST235/80R16 Radial tires, 14-Ply (Load Range G). These provide higher puncture resistance and load capacity compared to standard 10-ply tires.

  • Wheels: 16" x 6" heavy-duty 8-lug steel wheels (typically in black or silver powder coat).

  • Spare: A matching 14-ply spare tire and wheel are standard, usually mounted on an under-frame winch.

MAX Ramps System

These are 44" wide, spring-assisted ramps that provide a "dual-purpose" deck. They can be pinned upright for equipment or folded flat to the dovetail. When flat, they create a seamless, full-width loading floor, allowing you to haul hay, pipe, or long lumber over the entire length of the trailer.

16" Engineered Beam 2.0

Diamond C uses a Grade 100 steel frame. Instead of a standard heavy I-beam that is the same thickness throughout, this beam is "engineered"—it's taller and thicker at the high-stress points (the neck and axles) and thinner where it isn't needed, allowing the trailer to be stronger yet lighter than traditional builds.

Heavy-Duty Slipper Roller Suspension

The 2026 FMAX210 utilizes a slipper roller spring suspension system. The "roller" design allows the springs to move more freely, significantly reducing the "chatter" and vibrations felt in the truck when the trailer is empty, while providing superior stability when fully loaded.

Curved Engineered Gooseneck

The 12" gooseneck is constructed with a curved web design rather than sharp mitered corners. This distributes the towing stress across a larger surface area of the steel, preventing the structural cracks common in traditional gooseneck designs after years of heavy use.

Integrated Accessibility (Steps & Lighting)

Safety and ease of use are prioritized with two specific features:

  • Retractable Front Steps: Located on both sides of the neck for easy deck access.

  • Mid-Turn Steps: Integrated steps located near the axles that also house mid-ship LED turn signals for better visibility to other drivers during lane changes.

Under-Frame Spare Mount with Winch

Rather than taking up space in the neck or on the deck, the spare tire is stored under the trailer frame. It includes a retractable cable winch system, allowing you to lower the heavy dually wheel to the ground with a simple handle, saving you from heavy lifting during a roadside tire change.

PERFECT FOR
Given the heavy-duty construction and the specific MAX Ramp setup, the Diamond C FMAX210 is a "jack-of-all-trades" for high-capacity hauling. It bridges the gap between a dedicated equipment hauler and a flatbed.

Here is why it's perfect for three specific types of users:

Equipment & Machinery Movers

Because of the MAX Ramps, this trailer is ideal for hauling heavy, wide-track machinery like:

  • Skid Steers and Compact Track Loaders: The 44" wide ramps mean you don't have to perfectly align your tracks; there's plenty of margin for error.

  • Mini-Excavators: The low-profile "Engineered Beam" deck height makes loading tall machinery easier under height-restricted bridges.

  • Agricultural Equipment: The 25,000 lb GVWR is the "sweet spot" for mid-sized tractors and implements.

"Hot Shot" Trucking & Logistics

The FMAX210 is a staple for commercial hot shotters for several reasons:

  • Versatility: With the MAX Ramps folded flat, you have a full-width flat deck from the neck to the bumper. This allows you to haul long loads like steel pipe, lumber, or multiple pallets of freight that wouldn't fit on a trailer with traditional stand-up ramps.

  • Weight Efficiency: The Engineered Beam saves weight, which translates directly into a higher legal payload. In the hot shot world, every extra 500 lbs of payload capacity is extra profit.

Construction & General Contractors

For large-scale projects, this trailer acts as a mobile base:

  • Material Transfers: You can load it with heavy bundles of rebar or roofing materials, and because the deck is flat (with ramps down), forklifts can load/unload from the side or the rear with ease.

  • Durability: The slipper roller suspension and 14-ply tires are designed for high-mileage use on gravel job sites and highways alike, meaning less downtime for maintenance.

WHY CHOOSE THE DIAMOND C FMAX 210?
Better Payload Efficiency (Engineered Beam 2.0)

Most manufacturers use standard I-beams that are the same thickness from front to back. Diamond C uses Grade 100 Engineered Beams that are laser-cut to be taller and thicker only where the stress is highest.

  • The Result: You get a trailer that is significantly stronger but weighs up to 1,000 lbs less than the competition. In the hauling world, that’s an extra 1,000 lbs of cargo you can legally carry on every single trip.

Eliminating the "Gooesneck Sag"

Standard trailers often develop a permanent "frown" or sag after years of heavy use. The FMAX210 is built with a built-in camber (a slight upward arch) in the frame and deck. When you drop a 15,000 lb piece of equipment on it, the trailer flexes to level rather than sagging toward the ground. This keeps your load stable and prevents "trailer sway" at highway speeds.

Structural Longevity (Curved Neck Design)

Look at the corner of a standard gooseneck; it’s usually two beams cut at 45 degrees and welded together. This creates a "stress riser" where cracks eventually form.

  • The Diamond C Difference: Their curved neck distributes towing force across the entire radius of the steel. It effectively eliminates the #1 failure point on high-mileage trailers, which is why they have some of the highest resale values in the industry.

The MAX Ramp Advantage

While "Mega Ramps" from other brands are heavy and can be a struggle to lift, Diamond C’s MAX Ramps are engineered with a sophisticated spring-assist system.

  • Versatility: They offer 44" of width per ramp, leaving almost no gap in the middle. This allows you to load narrow-wheelbase equipment (like a lawnmower) or wide-track machinery (like a large excavator) on the same trailer without changing setups.

Resale Value and Brand Equity

Diamond C is currently the "it" brand for professional haulers and hotshotters. Because of the patented frame technology and the premium DM Difference powder coat finish (which resists rock chips and rust better than standard paint), a used FMAX often sells for 70-80% of its original price even after several years of use.





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8.5x40 Diamond C FMAX 210 Gooseneck Equipment Trailer - 25K GVWR - Max Ramps 8.5x40
Our Price: $23,590
Charcoal - Equipment/Utility

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