Tandem - Dual Wheel Gooseneck Trailer

Model: FMAX212

Tested and proven – the FMAX212 owns work. Select a 40′ model with Air Ride Suspension to create the perfect HOT SHOT trailer.

Build Your Own Trailer

At a Glance

GVWR: 25,900 lb
LENGTHS: 20′- 44′
BED WIDTH: 102″
FRAME: 16″ Low Profile Engineered Beam
NECK: 12″ Curved Engineered Gooseneck
AXLES: 2 – 12,000 lb Lippert Axles

FMAX Engineered Beam Technology & Logo

Engineered Beam Technology

We design, engineer, and build our own I-Beams. Our U.S. Patent Protected Engineered Beam design allows for the tallest and strongest beams in the industry, with the best strength-to-weight ratios on the road.

Taller beam. Lighter Weight. Stronger Frame.

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FMAX Overview Diagram
  1. The Neck – Curves distribute force throughout the neck so there is no concentration of stress in corners like traditional goosenecks.
  2. The Deck – It’s low profile for easy access. Tire-covers are HD 3/16” diamond plate. Boards are capped at each end of the deck for added durability.
  3. The Camber – The deck and frame have a slight camber when not loaded. When loaded, it flexes as necessary to level but never sags like traditional goosenecks.
  4. The Lace-rail – Channel-Iron for durability and versatility with no notches or cut-outs for maximum strength. Includes stake-pockets and pipe-spools.
  5. The Box – It’s big and roomy. The lid is curved for added rigidity and gas spring assisted for easy operation.
  6. The Steps – The retractable front deck steps solve the common issue of traditional front deck steps being bent in low clearance situations. The mid-deck side turn signal step makes for easy access when equipment is loaded.
  7. The I-Beams – We engineer the beams, optimize them, and build them for each trailer configuration just like semi trailer manufacturers have been for decades. Our I-beam frames are taller, stronger, and lighter than your neighbor’s. 14-18″ tall. Standard steel bends at 36 ksi. Our beams are built using steel rated at 50 ksi minimum.

Loading Your Way

Max Ramps

Max Ramps

44″ wide ramps for MAX versatility. 50 ksi steel ramp frames x 4 frames per ramp for MAX strength. HD Spring loaded for easy lifting. For safe, stable loading. Read more HERE.

12' Hydraulic Dovetail

12' Hydraulic Dovetail

12′ long with easy to climb, 12.5 degree approach angle. Includes Blackwood rubber-infused runners for traction, automatic latch for easy operation, and wireless remote control. Read more HERE.

XDR Ramps

XDR Ramps

These 24″ x 60″ spring-assisted extreme duty knee ramps are perfect for loading concentrated machines such as backhoes and excavators where space between the ramps is a necessity for knuckle height clearance. Read more HERE.

FMAX Straight Deck

Straight Deck

The Straight Deck tail configuration includes 3″ channel 96″ Rear Slide-In Ramps that can be conveniently stowed away when not in use. Come with a single piece bumper with light protection.

Find a Dealer Map

How Do I Order an FMAX212?

Great question! Keep scrolling to customize and build your FMAX212 gooseneck trailer to your liking with our interactive build-your-own trailer configurator, then you will be prompted to submit your trailer build to your nearest Diamond C dealer for quote and availability. We have an extensive dealer network of almost 200 dealers strategically placed throughout North America

Popular Upgrades

Hydraulic Jacks

12K Hydraulic Jacks

A must have for anyone who hooks and unhooks their trailer often! Fast, convenient, and strong. Learn more HERE.
 

215/75R17.5 Tire Upgrade

HD Tire Upgrade

Our 215/75R17.5 TIRE UPGRADE package features a bigger wheel and tire than standard, along with beefy 5/8″ studs.
 

Quality Trailers Since 1985

Diamond C has been an industry leader for over 35 years since our humble beginnings over 3 decades ago. We strive to be on the forefront of trailer manufacturing by continuously demonstrating excellent quality and value, cutting edge innovation, and superior customer service.

Design Your Own FMAX212

More Than Just A Trailer

Crabb Family

Family Owned and Operated

35 years ago a young East Texas couple embarked on a journey that at the time was merely a means to put food on the table for their growing family. Unbeknownst to them, their nature would have an endless impact on the business they would create…

OUR STORY
 

Diamond C Team Members

This is who we are and what makes us Different

Our Purpose is to fuel the growth and success of Diamond C team members, our customers, and our community.
Our Niche is extraordinary trailers and service to match.
Our Core Values are Do Work and Love Strong.

LEARN MORE
 

DM Powder Coating System

Our custom Difference Maker DM COATING SYSTEM produces extraordinary trailer finishes that are exceptionally durable and beautiful. We offer multiple standard and custom COLORS to perfectly compliment your trailer.

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Learning Center

Your one-stop-shop for everything trailer related. In-depth articles and resources about our trailers, options, culture, and what makes us stand apart from the other guys.

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Maximum Customizability

Choose from a variety of upgrades:

HYDRAULIC JACKS
BLACKWOOD LUMBER FLOORING
SHOCKER HITCH COUPLER
SLIDE TRACK & RATCHETS
AIR RIDE SUSPENSION
– and more…

The choice is yours.
Configure your ideal trailer below.

FMAX216 Air Ride Suspension
Synchrony and Sheffield Logos

Finance Your Trailer

Finance a brand new FMAX212 with ease through one of our trusted financial partners. Find out more HERE.
 

Diamond C Warranty Logo

Quality You Can Trust

We are proud of our trailers and stand by them. Every Diamond C trailer comes with an industry leading 3 Year WARRANTY.
 

Loading Style

Max Ramps

44" wide ramps for MAX versatility. 50 ksi steel ramp frames x 4 frames per ramp for MAX strength. HD Spring loaded for easy lifting from deck and from ground. For safe, stable loading.

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XDR Ramps

24" Wide x 60" Extreme Duty Knee Ramps. These spring-assisted ramps are perfect for loading concentrated machines such as backhoes and excavators where space between the ramps is a necessity for knuckle height clearance.

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12' Hydraulic Dovetail

12' long with easy to climb, 12.5 degree approach angle. Blackwood rubber-infused runners for traction. Automatic latch for easy operation. Includes wireless remote control.

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Straight Deck

Includes 96" Rear Slide-In Ramps (3" Channel). Single piece bumper with light protection.

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Length/Width

GVWR

Includes 2 - 12,000 lb Lippert Axles

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Ramps

Dove

Wood Filled Dove/Ramp

Ideal for loading equipment with steel tracks.

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12' Fully Automatic Hydraulic Dovetail

12.5 degree load angle with Blackwood infused lumber and automatic latch.

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Jack

2 - 12,000 lb Drop-Leg Jacks

Two heavy duty, square, drop-leg trailer jacks with a side-wind handles. Constructed of engineered alloys for enhanced strength, stability and side-load capability.

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2 - 12,000 lb Hydraulic JacksX
2 - 12,000 lb Hydraulic Jacks w/ Hydraulic DovetailX

Battery/Charger

Optional w/ Hydraulic Dovetail or Hydraulic Jack options

Paint Type

DM Difference Maker Coating System Logo

We partnered with Sherwin Williams to develop our own custom designed powder coat finishing system that provides long-lasting, rugged, and beautiful trailer finishes.

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Special Color

Choose from a variety of our Special Colors below, or enter your own custom color of choice.

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Paint Color

Axles

Brakes

Frame

16X

Cross-Members

Floor

2

Installed after painting to ensure no framing is left unfinished. Floor is secured with 5/16" screws and a bolt-on board cap.

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Blackwood Lumber Outer

Blackwood is rubber infused, pressure treated pine flooring that provides enhanced traction in the wettest conditions, outstanding impact resistance in the toughest environments, and increased flooring lifespan from its no fade, no crack technology.

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Blackwood Lumber Full

Blackwood is rubber infused, pressure treated pine flooring that provides enhanced traction in the wettest conditions, outstanding impact resistance in the toughest environments, and increased flooring lifespan from its no fade, no crack technology.

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(On Every Cross-Member)

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Neck

12

Curves distribute force throughout the neck so there is no concentration of stress in corners like traditional goosenecks.

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6

This option raises the coupler and horizontal neck height +6". Ideal for lifted vehicles (ex. Dodge 3500 with 4"-6" lift) or Semi-Tractor applications.

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Coupler

30,000 lb Bulldog BX1

Round Adjustable

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30,000 lb Bulldog Square Load Leveler

Heavy-duty, high-strength, steel construction with an easy to use vertical adjustment design for a quick and secure connection on the road.

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Shocker Hitch Air Ride Coupler

Air Ride towing for a smoother, safer ride. Shocker Hitch helps to eliminate the jerks felt when towing on rough roads by directing the tow resistance through an airbag, producing a smooth ride. Utilizes the BX1 Coupler.

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King-Pin Adapter

(Round Adjustable)

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Storage

Chain Tray

(In Top of Neck. Not Applicable w/ Winch Plate)

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Deck on the Neck

Bolt-on Deck on the Neck

7' x 8' Bolt-on Deck with Clearance Lights

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Weld-on Deck on the Neck

7' x 8' Weld-on Deck with Clearance Lights

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Lace Rail

Tie Downs

Stake Pockets

Slide Track & Ratchets

Full Length Slide Track (passenger side)

(Includes 1 welded ratchet between wheels)

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Full Length Slide Track (driver side)

(Includes 1 welded ratchet between wheels)

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Steps

(on rear of trailer)

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Wiring

Lights

All LED Lights

Waterproof, all rubber-mounted, impact resistant, wired with a heavy duty wiring harness.

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Sway Control

Winch

Winch Mounting Plate w/ Receiver Tube

(In Top of Neck. Not Applicable w/ Chain Tray)

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11.5K Winch Box Package

Includes battery, 5amp charger, and winch mounting plate.

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17.5K Warrior Winch Box Package

Includes battery, 5amp charger, and winch mounting plate.

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Tire Size

Wheel Color

Spare Mount

Spare Wheel Color

Spare Tire Size

Suspension

Hutch Heavy Duty Adjustable Suspension

Features easily adjustable torque arm screws, a maintenance free fastening system, and "Million Mile Rocker Bushing" which eliminates bushing fatigue and failure.

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Air Ride SuspensionX
Air Ride Suspension with Front Lift AxleX

Spread Axle

(Available on Hutch or Air Ride Suspension on 35'+ Lengths only)

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