Tandem - Super Single Gooseneck Trailer

Model: FMAX212SS

Inspired by the “Super Single” trend in the trucking industry, the FMAX212SS is pound for pound the strongest single wheel gooseneck on the planet.

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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
TIRES: 235/75R17.5 18 Ply Super Single

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.

READ MORE

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 Trailer Dealer Map

How Do I Order an FMAX212SS?

Great question! Keep scrolling to customize and build your FMAX212SS Super Single 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

Warrior Winch Package

Warrior Winch Package

Need to load downed or dead equipment? Add our loaded Warrior WINCH PACKAGE. Comes in 12K or 17.5K sizes.
 

Bolt-on LED Floodlights

Bolt-on LED Flood Lights

At 2700 Lumen, these work lights will help brighten up your nighttime grind. Learn more about our LED Lights HERE.
 

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 FMAX212SS

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.

CHECK IT OUT

Maximum Customizability

Choose from a variety of upgrades:

OAK FLOORING
CUSTOM COLORS
SHOCKER HITCH COUPLER
SLIDE TRACK & RATCHETS
AIR RIDE SUSPENSION
– and more…

The choice is yours.
Configure your ideal trailer below.

Diamond C FMAX210SS Fleetneck Engineered Beam Gooseneck Trailer
Synchrony and Sheffield Logos

Finance Your Trailer

Finance a brand new FMAX212SS 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.
 

3 Easy Steps to Build Your Own Trailer

  • Step 1

    Configure your ideal trailer below by selecting your desired specifications.

  • Step 2

    Submit your trailer build to your 3 closest Diamond C dealers.

  • Step 3

    Your selected dealer(s) will contact you with final pricing and availability.

Base MSRP: $17,995

*Trailers are shown with base MSRP pricing (Manufacturer’s Suggested Retail Price). MSRP is NOT final sales price - your final sales price varies depending on region and dealer. Be sure to submit your trailer to your local Diamond C dealer for final trailer pricing.

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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Price: $0.00

X
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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Price: $0.00

X
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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Price: $0.00

X
Straight Deck

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

Price: $0.00

X

Length/Width

Price:

GVWR

Includes 2 - 12,000 lb Lippert Axles

Price: $0.00

X

Ramps

96

Price: $0.00

X

Dove

60

Price: $0.00

X
Wood Filled Dove/Ramp

Ideal for loading equipment with steel tracks.

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Price: $415.00

X
60

Price: $0.00

X
12' Fully Automatic Hydraulic Dovetail

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

Price: $0.00

X
Full Steel Runner with Cleats

Price: $300.00

X

Price: $230.00

X

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.

Price: $0.00

X
2 - 25,000 lb Two Speed Drop-Leg Jacks

Price: $920.00

X
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

Group 27 Series Battery w/110V 5amp Charger

Price: $0.00

X
Trojan SCS 200 Battery Upgrade

Price: $245.00

X
Solar Charging System, 7 watt

Price: $170.00

X

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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Price: $0.00

X
Special Color

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

Price: $0.00
Price Descriptor: Varies

X

Paint Color

Black Logo

Price: $0.00

X
Metallic Gray Logo

Price: $0.00

X
Metallic Silver Logo

Price: $0.00

X
White Logo

Price: $0.00

X
Metallic Mocha Logo

Price: $0.00

X
Metallic Blue Logo

Price: $0.00

X
Red Logo

Price: $0.00

X
Cement Gray Logo

Price: $0.00

X
Commercial Yellow Logo

Price: $455.00

X
Tractor Green Logo

Price: $455.00

X
Industrial Orange Logo

Price: $455.00

X
Lime Green Logo

Price: $455.00

X
Custom Color Logo

Price: $0.00
Price Descriptor: Quote

X

Axles

2 - 12,000 lb Heavy Duty Oil Bath, Self-Adjust Electric Brakes Logo

Price: $0.00

X

Frame

16X

Cross-Members

3

Price: $0.00

X
3

Price: $180.00
Price Descriptor: $9 lin ft

X

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.

Price: $0.00

X
2

Price: $780.00
Price Descriptor: $39 lin ft

X
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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Price: $620.00
Price Descriptor: $31 lin ft

X
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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Price: $1,180.00
Price Descriptor: $59 lin ft

X
3/16

Price: $1,560.00
Price Descriptor: $78 lin ft

X

(On Every Cross-Member)

Price: $120.00
Price Descriptor: $6 lin ft

X

Neck

12

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

Price: $0.00

X
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.

Price: $150.00

X

Coupler

30,000 lb Bulldog BX1

Round Adjustable

Price: $0.00

X
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.

Price: $180.00

X
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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Price: $1,215.00

X
King-Pin Adapter

(Round Adjustable)

Price: $195.00

X

Storage

Diamond Plate Neck Box w/ Gas Shock Assisted Lid

Price: $0.00

X
Chain Tray

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

Price: $105.00

X

Price: $205.00
Price Descriptor: $205 ea

X
Full Width Locking Chain Rack, Weld-on

Price: $310.00

X
14

Price: $315.00
Price Descriptor: $315 ea

X
102' Underslung Dunnage Rack

Price: $540.00

X

Deck on the Neck

Price: $0.00

X
Bolt-on Deck on the Neck

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

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Price: $1,300.00

X
Weld-on Deck on the Neck

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

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Price: $1,300.00

X

Lace Rail

6

Price: $0.00

X

Tie Downs

5/8

Price: $20.00
Price Descriptor: $20 ea

X

Stake Pockets

2

Price: $0.00

X

Slide Track & Ratchets

Price: $0.00

X
Full Length Slide Track (passenger side)

(Includes 1 welded ratchet between wheels)

Price: $360.00
Price Descriptor: Varies based on Tail Style

X
Full Length Slide Track (driver side)

(Includes 1 welded ratchet between wheels)

Price: $360.00
Price Descriptor: Varies based on Tail Style

X
4

Price: $50.00
Price Descriptor: $50 ea

X
4

Price: $50.00
Price Descriptor: $50 ea

X

Steps

Front Retractable & Mid-Turn

Price: $0.00

X

(on rear of trailer)

Price: $95.00

X

Wiring

Sealed Wiring Harness
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Price: $0.00

X

Lights

All LED Lights

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

Price: $0.00

X
Flashing Caution LED Light on Rear

Price: $105.00

X
Extra 3/4

(sold as a pair)

Price: $55.00
Price Descriptor: $55/pair

X

Sway Control

Winch

Price: $0.00

X
Winch Mounting Plate w/ Receiver Tube

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

Price: $150.00

X
11.5K Winch Box Package

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

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Price: $1,740.00

X
17.5K Warrior Winch Box Package

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

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Price: $2,425.00

X

Tire Size

Price: $0.00

X

Wheel Color

Silver

Price: $0.00

X
Black

Price: $0.00

X

Spare Mount

Spare Mount in Gooseneck

Price: $0.00

X
Fold-Down Spare Mount
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Price: $235.00

X

Spare Wheel Color

Price: $0.00

X

Price: $0.00

X
Black Spare

Price: $0.00

X

Spare Tire Size

Price: $0.00

X

Price: $430.00

X

Brakes

Electric Drum

Price: $0.00

X
Electric-Over-Hydraulic Disc Brakes

Price: $3,290.00

X

Suspension

6-Leaf Slipper Springs, 48

Price: $0.00

X
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.

Price: $645.00

X
Air Ride Suspension with Front Lift AxleX

Spread Axle

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

Price: $0.00

X

Price: $130.00

X

Price: $130.00

X