2021 Ram 3500 6.7L I6 Cummins Diesel towing capacity.

The 2021 6.7L I6 Cummins Diesel tows 19,500 - 22,670 lbs across diesel so configurations, depending on cab, drivetrain, axle ratio, wheel class, GVWR, GCWR, and box configuration.

Find your towing capacity Look up your 2021 6.7L I6 Cummins Diesel configuration View full comparison chart Compare all 2021 Ram 3500 configurations Open year guide Return to the 2021 Ram 3500 overview

Built from the official Ram 2021 towing guide pages used for this engine page. Citations for 6.7L I6 Cummins Diesel are available below.

2021 Ram 3500
6.7L I6 Cummins Diesel RANGE
19,500 - 22,670 LBS
PEAK PAYLOAD
6,840 LBS
MAX GCWR
30,300 LBS
Towing data

2021 6.7L I6 Cummins Diesel towing capacity by configuration

Each row below is one published configuration from the 2021 Ram 3500 towing guide, showing towing capacity, payload, GVWR, GCWR, axle ratio, and wheel class.

CREW CAB 4x2 TRADESMAN W BOX 6'4" SRW
3.73 SRW 11,500 lbs 4,190 lbs 28,300 lbs 20,520 lbs Base 7,313 lbs Base F/R 4,425 lbs / 2,888 lbs GAWR F/R 5,500 lbs / 7,000 lbs 6-Spd Auto 68RFE · TRADESMAN · BOX (unspecified) p.1
CREW CAB 4x2 TRADESMAN W BOX 8'0" DRW
4.10 DRW 14,000 lbs 6,190 lbs 30,300 lbs 22,020 lbs Base 7,814 lbs Base F/R 4,561 lbs / 3,253 lbs GAWR F/R 5,500 lbs / 9,750 lbs 6-Spd Auto 68RFE · TRADESMAN · BOX (unspecified) p.1
3.73 DRW 14,000 lbs 6,190 lbs 28,300 lbs 20,020 lbs Base 7,814 lbs Base F/R 4,561 lbs / 3,253 lbs GAWR F/R 5,500 lbs / 9,750 lbs 6-Spd Auto 68RFE · TRADESMAN · BOX (unspecified) p.1
CREW CAB 4x2 TRADESMAN W BOX 8'0" SRW
3.73 SRW 12,000 lbs 4,540 lbs 28,300 lbs 20,370 lbs Base 7,456 lbs Base F/R 4,562 lbs / 2,894 lbs GAWR F/R 5,500 lbs / 7,000 lbs 6-Spd Auto 68RFE · TRADESMAN · BOX (unspecified) p.1
CREW CAB 4x2 TRADESMAN W RAMBOX 6'4" SRW
3.73 SRW 11,500 lbs 4,040 lbs 28,300 lbs 20,370 lbs Base 7,459 lbs Base F/R 4,447 lbs / 3,011 lbs GAWR F/R 5,500 lbs / 7,000 lbs 6-Spd Auto 68RFE · TRADESMAN · RamBox p.1
CREW CAB 4x4 TRADESMAN W BOX 6'4" SRW
3.73 SRW 11,800 lbs 4,200 lbs 28,300 lbs 20,230 lbs Base 7,598 lbs Base F/R 4,686 lbs / 2,912 lbs GAWR F/R 6,000 lbs / 7,000 lbs 6-Spd Auto 68RFE · TRADESMAN · BOX (unspecified) p.2
CREW CAB 4x4 TRADESMAN W BOX 8'0" DRW
4.10 DRW 14,000 lbs 5,860 lbs 30,300 lbs 21,690 lbs Base 8,142 lbs Base F/R 4,855 lbs / 3,287 lbs GAWR F/R 6,000 lbs / 9,750 lbs 6-Spd Auto 68RFE · TRADESMAN · BOX (unspecified) p.2
3.73 DRW 14,000 lbs 5,860 lbs 28,300 lbs 19,690 lbs Base 8,142 lbs Base F/R 4,855 lbs / 3,287 lbs GAWR F/R 6,000 lbs / 9,750 lbs 6-Spd Auto 68RFE · TRADESMAN · BOX (unspecified) p.2
CREW CAB 4x4 TRADESMAN W BOX 8'0" SRW
3.73 SRW 12,300 lbs 4,500 lbs 28,300 lbs 20,030 lbs Base 7,802 lbs Base F/R 4,849 lbs / 2,953 lbs GAWR F/R 6,000 lbs / 7,000 lbs 6-Spd Auto 68RFE · TRADESMAN · BOX (unspecified) p.2
CREW CAB 4x4 TRADESMAN W RAMBOX 6'4" SRW
3.73 SRW 11,800 lbs 4,060 lbs 28,300 lbs 20,090 lbs Base 7,743 lbs Base F/R 4,684 lbs / 3,059 lbs GAWR F/R 6,000 lbs / 7,000 lbs 6-Spd Auto 68RFE · TRADESMAN · RamBox p.2
MEGA CAB 4x4 BIG HORN W BOX 6'4" DRW
4.10 DRW 14,000 lbs 5,670 lbs 30,300 lbs 21,500 lbs Base 8,328 lbs Base F/R 4,869 lbs / 3,459 lbs GAWR F/R 6,000 lbs / 9,750 lbs 6-Spd Auto 68RFE · BIG HORN · BOX (unspecified) p.2
3.73 DRW 14,000 lbs 5,670 lbs 28,300 lbs 19,500 lbs Base 8,328 lbs Base F/R 4,869 lbs / 3,459 lbs GAWR F/R 6,000 lbs / 9,750 lbs 6-Spd Auto 68RFE · BIG HORN · BOX (unspecified) p.2
MEGA CAB 4x4 BIG HORN W BOX 6'4" SRW
3.73 SRW 12,300 lbs 4,300 lbs 28,300 lbs 19,830 lbs Base 7,999 lbs Base F/R 4,897 lbs / 3,102 lbs GAWR F/R 6,000 lbs / 7,000 lbs 6-Spd Auto 68RFE · BIG HORN · BOX (unspecified) p.2
MEGA CAB 4x4 BIG HORN W RAMBOX 6'4" SRW
3.73 SRW 12,300 lbs 4,120 lbs 28,300 lbs 19,650 lbs Base 8,183 lbs Base F/R 4,946 lbs / 3,237 lbs GAWR F/R 6,000 lbs / 7,000 lbs 6-Spd Auto 68RFE · BIG HORN · RamBox p.2
REGULAR CAB 4x2 TRADESMAN W BOX 8'0" DRW
4.10 DRW 14,000 lbs 6,840 lbs 30,300 lbs 22,670 lbs Base 7,163 lbs Base F/R 4,218 lbs / 2,945 lbs GAWR F/R 5,500 lbs / 9,750 lbs 6-Spd Auto 68RFE · TRADESMAN · BOX (unspecified) p.1
3.73 DRW 14,000 lbs 6,840 lbs 28,300 lbs 20,670 lbs Base 7,163 lbs Base F/R 4,218 lbs / 2,945 lbs GAWR F/R 5,500 lbs / 9,750 lbs 6-Spd Auto 68RFE · TRADESMAN · BOX (unspecified) p.1
REGULAR CAB 4x2 TRADESMAN W BOX 8'0" SRW
3.73 SRW 11,500 lbs 4,610 lbs 28,300 lbs 20,940 lbs Base 6,886 lbs Base F/R 4,220 lbs / 2,666 lbs GAWR F/R 5,500 lbs / 7,000 lbs 6-Spd Auto 68RFE · TRADESMAN · BOX (unspecified) p.1
REGULAR CAB 4x4 TRADESMAN W BOX 8'0" DRW
4.10 DRW 14,000 lbs 6,400 lbs 30,300 lbs 22,230 lbs Base 7,597 lbs Base F/R 4,533 lbs / 3,064 lbs GAWR F/R 6,000 lbs / 9,750 lbs 6-Spd Auto 68RFE · TRADESMAN · BOX (unspecified) p.2
3.73 DRW 14,000 lbs 6,400 lbs 28,300 lbs 20,230 lbs Base 7,597 lbs Base F/R 4,533 lbs / 3,064 lbs GAWR F/R 6,000 lbs / 9,750 lbs 6-Spd Auto 68RFE · TRADESMAN · BOX (unspecified) p.2
REGULAR CAB 4x4 TRADESMAN W BOX 8'0" SRW
3.73 SRW 11,800 lbs 4,520 lbs 28,300 lbs 20,550 lbs Base 7,279 lbs Base F/R 4,545 lbs / 2,734 lbs GAWR F/R 6,000 lbs / 7,000 lbs 6-Spd Auto 68RFE · TRADESMAN · BOX (unspecified) p.2
TONGUE LOAD CONV / 5TH-WHEEL
10% / 15%
Conventional vs. 5th-wheel/gooseneck
TRAILERING HARDWARE EQUIPMENT WEIGHT
75 / 70 / 250 LBS
Conventional / gooseneck / 5th wheel
HITCH THRESHOLDS TRAILER LIMITS
23k / 30k LBS
5th-wheel / gooseneck required above this weight
RATING METHOD STANDARD
SAE J2807
Industry tow-rating standard
VIEW ALL FINE PRINT
GUIDE FINE PRINT

Ground rules behind every 2021 Ram 3500 towing rating.

These guide rules define the payload, trailering hardware, and limits behind every 2021 Ram 3500 towing rating on this page.

FIG. 2021 LOAD Baseline Weights

Weights Ram already counted in every rating

  • Passenger weight: 300 lbs counted for driver + passengers.
  • Options weight: 100 lbs counted for factory-installed options.
  • Conventional tongue: 10% of gross trailer weight.
  • 5th-wheel / gooseneck tongue: 15% of gross trailer weight.
FIG. 2021 CALC Payload Formula

How Ram derives payload from base weight

  • Formula: Payload = GVWR - Base Weight
  • Values: Published as estimated values.
  • Rounding: nearest 10 lbs.
FIG. 2021 HITCH Hitch Loading

Hardware weight deducted from payload

  • Conventional hitch: 75 lbs of equipment weight.
  • Gooseneck: 70 lbs of equipment weight.
  • 5th wheel: 250 lbs of equipment weight.
FIG. 2021 LIMIT Commercial / Hitch Limits

Chassis-cab and heavy-trailer thresholds

  • Body-completion weight: 80 lbs per foot from end of cab to end of frame.
  • 5th-wheel required over: 23,000 lbs trailer weight.
  • Gooseneck required over: 30,000 lbs trailer weight.
FIG. 2021 STD Rating Standard

SAE J2807 compliance

  • Trailer Weight Rating and Tow Vehicle Trailering Weight are calculated as specified in SAE J2807.
FIG. 2021 WARN Warnings

Manufacturer safety warnings

  • Payload and Trailer Weight Rating are mutually exclusive.
  • GAWRs, GVWRs and GCWRs should never be exceeded.
  • Payload and GAWR should never be exceeded and must account for all of the above weights, including the appropriate trailering equipment and tongue weight.
FIG. 2021 NOTES Policy Notes

All published notes from the 2021 towing guide

  • Payload and Max Trailer Weights are ESTIMATED values. p.3
  • All values are shown in pounds unless otherwise stated. p.3
  • Payload and Max Trailer Weight values are rounded to the nearest 10lb. p.3
  • Payload = GVWR - Base Weight p.3
  • Payload and Trailer Weight Rating are mutually exclusive. p.3
  • GAWRs, GVWRs and GCWRs should never be exceeded. p.3
  • Trailer Weight Rating and Tow Vehicle Trailering Weight are calculated as specified in SAE J2807. p.3
  • Passenger Weight = 300 lb p.3
  • Options Weight = 100 lb p.3
  • Trailering Equipment Weight: 75 lb for Conventional Hitch, 70 lb for Gooseneck and 250 lb for 5th Wheel. p.3
  • Tongue weight: 10 percent of the gross trailer weight for Conventional Hitch, 15 percent of the gross trailer weight for a 5th Wheel or Gooseneck hitch. p.3
  • Payload and GAWR should never be exceeded and must account for all of the above weights, including the appropriate trailering equipment and tongue weight. p.3
  • Box Off Body Completion Weight = 80 lb per foot from end of cab to end of frame p.3
  • A fifth-wheel hitch is required for trailers over 23,000 lbs. p.3
  • A Gooseneck hitch is required for trailers over 30,000 lbs. p.3
NOTES: These ground rules apply to every published towing and payload rating. Your specific truck configuration may have additional constraints.
Technical Audit

Data sources

These citations show the Ram guide pages used to build the 2021 6.7L I6 Cummins Diesel engine page and guide-rule notes.

Show source pages for the 6.7L I6 Cummins Diesel page
DOC_ID: ram-3500 DOCUMENT BASIS

2021 Ram 3500 Diesel SO Towing Guide

Audit Scope PAGES: 1-3