Triple - Dual Wheel Pintle Hitch Trailer

Model: PX312

Work begins when the PX312 shows up and shows out.

Build Your Own Trailer

At a Glance

GVWR: 30,000 lb (w/ optional 40K Upgrade)
LENGTHS: 25′ – 40′
BED WIDTH: 102″
FRAME: 16″ – 18″ Low Profile Engineered Beam
TONGUE: 16″ Engineered Tongue w/60K Pintle Eye
AXLES: 3 – 12,000 lb Lippert Axles

Model PX312 60K pintle ring

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

Model PX210 pintle hitch trailer with HD V-Tongue Lid Box

HD V-Tongue Lid

This innovative Diamond C original storage solution is included as a standard option. The HD V-Tongue Lid includes a gas shock assist and offers maximum storage space for jacks, tools, straps, and other items. Constructed with 3/16″ Diamond Plate, this lid also doubles as bonus deck space. #WorkSmarter

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Model PX pintle hitch trailer diagram
  1. 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. 16″-18″ tall. Standard steel bends at 36 ksi. Our beams are built using steel rated at 50 ksi minimum.
  2. 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.
  3. The Lace-rail – Channel-Iron for durability and versatility with no notches or cut-outs for maximum strength. Includes stake-pockets and pipe-spools.
  4. The Lid – Our HD V-Tongue Lid is an intelligently crafted storage solution that doubles as bonus deck space.
  5. The Tongue – 16″ Engineered Tongue with 60K Pintle Eye.
  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 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.

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 a PX312?

Great question! Keep scrolling to customize and build your PX312 pintle hitch equipment 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

Model PX312 pintle hitch trailer with 40K GVWR upgrade

40,000 lb GVWR Upgrade

When only the very best will do, upgrade your PX312 to our heavy duty 40K GVWR PACKAGE. Includes frame/tongue reinforcements for maximum strength. #DoWork

Heavy duty adjustable suspension

Heavy Duty Adjustable Suspension

This suspension upgrade features easily adjustable torque arm screws, a maintenance free fastening system, and “Million Mile Rocker Bushing” which eliminates bushing fatigue and failure.
 

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 PX312

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:

– HD 215/75R17.5 TIRE UPGRADE
– Upgraded BATTERY and SOLAR charger
HYDRAULIC JACKS
– 2 – 25,000 lb Two Speed Drop-Leg Jacks
OAK FLOORING
– and more…

The choice is yours.
Configure your ideal trailer below.

Model PX210 pintle hitch trailer with Oak floor
Synchrony and Sheffield Logos

Finance Your Trailer

Finance a brand new PX312 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: $22,410

*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.

Watch Video

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.

Watch Video

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.

Watch Video

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 3 - 12,000 lb Lippert Axles

Price: $0.00

X

Includes Frame and Tongue Reinforcements

Price: $1,500.00

X

Need 40K GVWR? Select a 30' or longer model above

Ramps

96

Price: $0.00

X

Dove

60

Price: $0.00

X
Wood Filled Dove/Ramp

Ideal for loading equipment with steel tracks.

Watch Video

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

Axles

3 - 12,000 lb Heavy Duty Oil Bath, Self-Adjust Electric Brakes Logo

Price: $0.00

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: $930.00

X
Air Ride Suspension with Front Lift AxleX

Want Air Ride? Select a 35' or longer length

Want Air Ride? Select a 35' or longer length

Air Ride Suspension is not available on this length Hydraulic Dovetail triple axle model. Please select a 35' or longer length above to view Air Ride options.

X

Pull Type

16

(66" Long)

Price: $0.00

X

Frame

16X
18X

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

Tire Size

Price: $0.00

X

Price: $1,240.00

X
215/75R17.5 16 Ply Radial, Dually

Price: $2,245.00

X

Wheel Color

Black

Price: $0.00

X

Spare Mount

Spare Mount in Neck

Price: $0.00

X

Spare Tire

Price: $220.00

X

Price: $315.00

X

Price: $380.00

X

Brakes

Electric Drum

Price: $0.00

X
Electric-Over-Hydraulic Disc Brakes

Price: $4,405.00

X