2026 Diamond C FMAX312 40K PKG 44' x 102" MR
- Year 2026
- Make Diamond C
- Model FMAX312 40K PKG
2026 Diamond C FMAX312 40K PKG 44' x 102" MR
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:
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.
- 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.
- 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 main frame beams with a 10-gauge thickness have doubled the yield strength of the Fleetneck 1.0.
- 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.
Dimensions
Length
44'
Width
102"
Coupling
3" Ball - 40,000 lb Adjustable Telescoupler
Capacities
Axle Capacity, Rear
12,000 lb Heavy Duty, Oil Bath
Storage Capacity
Diamond Plate Neck Box w/ Gas Shock Assisted Lid
Weights
GVWR
40,000 lb
Chassis
Chassis
Crossmembers: 3" I-Beam on 16" Centers w/ Formed Gussets
Mainframe
18" Engineered Beam 2.0
Axle Count
3
Wheels & Tires
Tires, Rear Specification
235/80R16 14 Ply Radial, Dually
Color
Colors
Onyx Black | Artic White | Scarlet Red | Cement Gray | Carbon Metallic Gray | Platinum Silver Metallic | Mocha Metallic | Dynamic Blue Metallic
Features
Features
Dove: 60" Dovetail with 2" x 2" x 1/8" Angle Cleats (Max 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
Suspension
Suspension
Slipper Roller HD
Lights and Safety
Lighting
All LED Lights
Harness
Sealed Wiring Harness
Brakes
Brake System Type
Electric Drum