2026 Diamond C FMAX312 40K PKG 44' x 102" SD

Information

2026 Diamond C FMAX312 40K PKG 44' x 102" SD

With an up to 40,000 lb GVWR, 18" Engineered Beam frame, and 9,000 lb curb weight, the FMAX312 triple dual wheel gooseneck trailer is the undisputed king of the road. This FMAX312 gooseneck trailer sets the benchmark for strength and capacity, making it the ultimate choice for heavy-duty hauling.

Features may include:

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.
New, Lighter Neck
  • The Fleetneck 2.0 neck web is stronger and lighter with the new 10-gauge Grade 80 material resulting in a 65-pound weight reduction.
New Spare Mount Location
  • The new spare tire mount location with the easy-to-handle winch that raises and lowers the spare is now located under the trailer deck, guaranteeing it is out of your way until you need it.
Grade 100 Beams
  • Grade 100 main frame beams with a 10-gauge thickness have doubled the yield strength of the Fleetneck 1.0.
Chain Tray/Winch Mount
  • Storing your chains is easy with the standard chain tray with a winch mount combination and has the option to add a bolt-on winch box.

Photos

Highlights

  • Selkirk, Manitoba
  • 2026
  • Diamond C
  • FMAX312 40K PKG 44' x 102" SD
  • Crossmembers: 3" I-Beam on 16" Centers w/ Formed Gussets
  • Available
  • 102"

Specifications

  • 2026
  • Diamond C
  • FMAX312 40K PKG
  • 44' x 102" SD
  • Gooseneck
  • 44'
  • 102"
  • 3" Ball - 40,000 lb Adjustable Telescoupler
  • 12,000 lb Heavy Duty, Oil Bath
  • Diamond Plate Neck Box w/ Gas Shock Assisted Lid
  • 40,000 lb
  • Crossmembers: 3" I-Beam on 16" Centers w/ Formed Gussets
  • 18" Engineered Beam 2.0
  • 3
  • 235/80R16 14 Ply Radial, Dually
  • Onyx Black | Artic White | Scarlet Red | Cement Gray | Carbon Metallic Gray | Platinum Silver Metallic | Mocha Metallic | Dynamic Blue Metallic
  • Ramps: 96" Rear Slide-In Ramps | Pull Type: 12" Engineered Gooseneck | Jack: 2 - 12,000 lb Drop-Leg Jacks | Floor: 2" Treated Lumber | Winch: Winch Tray | Lace Rail: 6" Channel Lace Rail | Stake Pockets: 2" x 3/8" Rub Rail w/ Stake Pockets & Pipe Spools | Steps: Front Retractable & Mid-Turn | Spare Mount: Under-Frame Spare Mount | Sway Control
  • Slipper Roller HD
  • All LED Lights
  • Sealed Wiring Harness
  • Electric Drum