Can a 2024 Ford F-350 Super Duty SRW King Ranch 4WD Crew Cab 8ft Box Safely Tow a 16,500 lb Brinkley Model Z 3100 Luxury Fifth Wheel?
Configured with the 6.7L High-Output PowerStroke Diesel (500 hp / 1,200 lb-ft) and 3.55:1 axle ratio, this 2024 Ford F-350 Super Duty SRW King Ranch 4WD Crew Cab 8ft Box carries a 4,340 lb (1969 kg) FMVSS 110 B-pillar payload sticker and 31,000 lb SAE J2807 GCWR. Coupling a loaded 16,500 lb Brinkley Model Z 3100 Luxury Fifth Wheel (13,790 lbs dry UVW) applies 2,970 lbs of raw coupling load (2,970 lbs net on truck), resulting in +670 lbs of door-sticker payload reserve (85% utilization).
Coupling load (2,970 lb raw / 2,970 lb net) counts against door payload.
2024 Ford F-350 Super Duty SRW King Ranch 4WD Crew Cab 8ft Box Over-Axle Pin & RAWR Summary
In-bed fifth-wheel load check for 6.7L High-Output PowerStroke Diesel (500 hp / 1,200 lb-ft) pulling Brinkley Model Z 3100 Luxury Fifth Wheel:
MATRIX F-350 Super Duty SRW Trailer Sensitivity (-20% to +20% Around 16,500 lbs)
2024 Ford F-350 Super Duty SRW King Ranch 4WD Crew Cab 8ft Box Trailer Weight Sensitivity (3.55 Axle)
Five loaded weight steps around Brinkley Model Z 3100 Luxury Fifth Wheel (13,790 lb dry UVW) with 380 lb cabin and 140 lb cargo fixed:
| Simulation Tier | Loaded Trailer | 18% Pin Load | Total Payload Used | Remaining Margin | Combined GCW | SAE J2807 Verdict |
|---|---|---|---|---|---|---|
| Light Camp Load (-20%) | 13,200 lbs | 2,376 lbs (2,376 net) | 3,076 / 4,340 lbs | +1,264 lbs (71%) | 21,960 / 31,000 lbs | OPTIMAL |
| Reduced Gear Load (-10%) | 14,850 lbs | 2,673 lbs (2,673 net) | 3,373 / 4,340 lbs | +967 lbs (78%) | 23,610 / 31,000 lbs | OPTIMAL |
| Nominal Target Rig (0% (Base)) | 16,500 lbs | 2,970 lbs (2,970 net) | 3,670 / 4,340 lbs | +670 lbs (85%) | 25,260 / 31,000 lbs | NEAR LIMIT |
| Full Water & Gear (+10%) | 18,150 lbs | 3,267 lbs (3,267 net) | 3,967 / 4,340 lbs | +373 lbs (91%) | 26,910 / 31,000 lbs | NEAR LIMIT |
| Heavy Stress Test (+20%) | 19,800 lbs | 3,564 lbs (3,564 net) | 4,264 / 4,340 lbs | +76 lbs (98%) | 28,560 / 31,000 lbs | OVERLOAD |
1. Class 3 One-Ton SRW Envelope (12,400 lb GVWR / 4,340 lb Payload)
Per the 2024 Ford RV & Trailer Towing Guide, stepping up from an F-250 to an F-350 Single-Rear-Wheel (SRW) 8-foot long box raises certified GVWR to 12,400 lbs over an 8,060 lb curb weight, delivering 4,340 lbs of legal payload. With 380 lbs in the cab, 140 lbs in the bed, 180 lbs for the OEM puck fifth-wheel hitch, and 2,970 lbs of 18% pin weight from the 16,500 lb Brinkley Model Z 3100, payload utilization sits at 3,670 / 4,340 lbs (85% load, +670 lbs reserve).
2. SRW vs. DRW Boundary: The 7,230 lb Rear Tire Load Index Limit
On a one-ton SRW pickup, the ultimate structural ceiling is not the frame or the 1,200 lb-ft High-Output diesel, but the dual rear LT275/70R18E or LT275/65R20E tires rated at 3,640 lbs each (7,230 lb Rear GAWR). Here, loaded rear axle weight reaches 6,852 lbs (+378 lbs RAWR margin). Any fifth wheel or toy hauler exceeding 17,500 lbs (3,150+ lb pin) crosses the SRW tire boundary and requires an F-350 DRW dually (9,900 lb Rear GAWR).
3. 8-Foot Long-Box Wheelbase (176 Inches) Stability & Clearance
The 176-inch Crew Cab long-box wheelbase provides full 90-degree jackknife backing clearance for the 96-inch-wide Brinkley front cap without needing a heavy sliding hitch, and tracks rock-steady in crosswinds at 25,260 lbs combined GCW (+5,740 lbs GCWR reserve).
4. Dana M275 Full-Float Axle Hubs, 48-Gallon Midship Tank & MORryde Pin Isolation
Every F-350 SRW equipped with the 6.7L High-Output diesel upgrades to a full-floating Dana M275 rear axle where dual tapered wheel hub bearings carry vertical fifth-wheel mass directly on the forged spindle tube, leaving the internal 36-spline axle shafts stressed solely in torsion. Ford’s Crew Cab 8-foot long box also unlocks the cavernous 48-gallon midship diesel tank (~530 miles of highway towing range between truck-stop lanes). Pairing Brinkley’s factory Curt Helux or MORryde rubber-shear pin box with the OEM Ford puck hitch eliminates fore-aft chucking over concrete interstate expansion joints.
Frequently Asked Questions (2024 Ford F-350 Super Duty SRW Towing)
FAQ Is an F-350 SRW sufficient for a 16,500 lb fifth wheel, or do I need a dually (DRW)?
A 16,500 lb luxury fifth wheel (2,970 lb 18% pin) sits right at the upper sweet spot for a 12,400 lb GVWR F-350 SRW (+670 lbs payload reserve, +378 lbs Rear GAWR margin). If stepping up to an 18,000+ lb triple-axle toy hauler, upgrade to a DRW dually.
FAQ What limits an F-350 SRW Rear GAWR to 7,230 lbs?
Federal Rear GAWR cannot exceed the combined cold load index of the two rear single LT tires (typically Load Index 126/129 at 80 PSI cold = 3,640 to 4,080 lbs per tire).
FAQ Does the 6.7L High-Output PowerStroke reduce payload compared to the standard 6.7L?
Wet curb mass between the standard 6.7L (475 hp) and High-Output 6.7L (500 hp / water-cooled turbo manifolds) differs by less than 25 lbs, leaving F-350 SRW payload above 4,200 lbs.
Related HD & 5th Wheel Audits & Calculators
Browse Heavy-Duty 2500/3500 5th Wheel & Gooseneck Pin Weight Guides matchups alongside Ford F-350 Super Duty SRW: