Ram · Heavy-duty 1-ton pickup
Ram 3500 bed dimensions & sizes by year
Buying a tonneau cover and not sure it'll fit? Pick your model year to get the exact bed length of your Ram 3500 in inches — plus the covers built for it. No guesswork, no wrong-size returns.
Find your bed size in 10 seconds
The Ram 3500 has come in 2 bed lengths across 2003–2026:
Select your year above for the exact bed length that fits your truck.
Not sure which bed you have?
Two Ram 3500s from the same year can have different beds depending on cab. Don't trust the badge — measure it. It takes 30 seconds and saves a return.
- 1
Close the tailgate.
- 2
Put a tape measure on the bed floor against the bulkhead (the wall behind the cab).
- 3
Measure straight back to the inside of the closed tailgate.
- 4
Match that number to a bed length above — covers are sold by category (5.5 ft, 6.5 ft, 8 ft…), so round to the nearest one.
Ram 3500 bed sizes & specs, year by year
Ram 3500 · 5th gen (Ram 3500)
| Bed | Length | Inches | Cabs | |
|---|---|---|---|---|
| 6.4 ft | 6'4" | 76.3" | Crew Cab, Mega Cab | Covers → |
| 8 ft | 8'0" | 98.3" | Regular Cab, Crew Cab | Covers → |
- Cab styles
- Regular Cab, Crew Cab, Mega Cab
- Drivetrain
- RWD, 4WD
- Max towing
- 37,090 lb
- Max payload
- 7,680 lb
- MSRP from
- $44,000 (launch)
Engines (3)
- 6.4L HEMI V8 410 hp · 429 lb-ft · Gas
- 6.7L Cummins Turbo Diesel I6 (SO) 370 hp · 850 lb-ft · Diesel
- 6.7L Cummins High-Output Turbo Diesel I6 420 hp · 1075 lb-ft · Diesel
Current body. Regular Cab = 8' bed ONLY; Mega Cab = 6'4" ONLY; Crew Cab = 6'4" or 8'. Covers fit DRW (dually) and SRW beds identically. Bed inner dims unchanged from 4th gen. Inches cross-confirmed (76.3/98.3).
Ram 3500 · 4th gen (Ram 3500)
| Bed | Length | Inches | Cabs | |
|---|---|---|---|---|
| 6.4 ft | 6'4" | 76.3" | Crew Cab, Mega Cab | Covers → |
| 8 ft | 8'0" | 98.3" | Regular Cab, Crew Cab | Covers → |
- Cab styles
- Regular Cab, Crew Cab, Mega Cab
- Drivetrain
- RWD, 4WD
- Max towing
- 31,210 lb
- Max payload
- 7,390 lb
- MSRP from
- $30,000 (launch)
Engines (3)
- 5.7L HEMI V8 (2010-2013) 345 hp · 375 lb-ft · Gas
- 6.4L HEMI V8 (2014+) 410 hp · 429 lb-ft · Gas
- 6.7L Cummins Turbo Diesel I6 385 hp · 930 lb-ft · Diesel
Brand became 'Ram' in 2010. Regular Cab = 8' bed ONLY; Mega Cab = 6'4" ONLY; Crew Cab = 6'4" or 8'. Covers fit DRW and SRW beds identically. Inches cross-confirmed (76.3/98.3).
Ram 3500 · 3rd gen (Dodge Ram 3500)
| Bed | Length | Inches | Cabs | |
|---|---|---|---|---|
| 6.4 ft | 6'4" | 76.3" | Regular Cab, Quad Cab, Mega Cab | Covers → |
| 8 ft | 8'0" | 98.3" | Regular Cab, Quad Cab | Covers → |
- Cab styles
- Regular Cab, Quad Cab, Mega Cab
- Drivetrain
- RWD, 4WD
- Max towing
- 16,850 lb
- Max payload
- 5,130 lb
- MSRP from
- $26,000 (launch)
Engines (3)
- 5.9L Cummins Turbo Diesel I6 325 hp · 610 lb-ft · Diesel
- 6.7L Cummins Turbo Diesel I6 (2007.5+) 350 hp · 650 lb-ft · Diesel
- 5.7L HEMI V8 (2004+) 345 hp · 375 lb-ft · Gas
Badged 'Dodge'. Mega Cab debuted MY2006, short (6'4") bed ONLY. Short box nominally ~75.9"/6'3" but the tonneau industry fits it as 6'4"/76.3" — flagged verify. Covers fit dually (DRW) and single-rear-wheel beds IDENTICALLY (only fenders differ).
What fits in a Ram 3500 bed
Bed length in inches only means something once you know what it swallows. Here's how the loads people actually haul line up against every Ram 3500 bed on record.
| Load | Needs | 6.4 ft · 76.3" | 8 ft · 98.3" |
|---|---|---|---|
| 4×8 ft sheet of plywood or drywall | 96" | Won't fit | Fits, tailgate up |
| 8 ft 2×4s and trim lumber | 96" | Won't fit | Fits, tailgate up |
| Full-size dirt bike | 85" | Tailgate down | Fits, tailgate up |
| Adult mountain bike, wheels on | 70" | Fits, tailgate up | Fits, tailgate up |
| Two-person truck bed tent | 60" | Fits, tailgate up | Fits, tailgate up |
| Standard 48×40 in shipping pallet | 48" | Fits, tailgate up | Fits, tailgate up |
"Tailgate down" assumes the roughly 18 inches a dropped tailgate adds on a typical pickup — measure yours before you count on it, and strap anything that overhangs. Width is the other half of the answer: a 48-inch sheet only lies flat on the bed floor when the wheel wells are more than 48 inches apart, otherwise it rides on top of the arches. For cubic feet of mulch, soil or gravel, run your dimensions through the bed volume calculator.
Volume is one limit, weight is the other. Check your Ram 3500's real payload → · what it can actually tow →
More Ram 3500 specs
Bed size is one number among several. These carry the rest of the reference data for this truck specifically.
Other trucks with a Ram 3500-size bed
Cross-shopping, or checking whether a cover you already own could move to another truck? These pickups come in a bed within two inches of a Ram 3500 bed.
- Chevrolet Silverado 1500
- Chevrolet Silverado 2500HD
- Chevrolet Silverado 3500HD
- Ford F-150
- Ford F-250 Super Duty
- Ford F-350 Super Duty
- GMC Sierra 1500
- GMC Sierra 2500HD
Same length still isn't the same cover — rail height and bed-rail profile differ by truck. Confirm with the fitment checker before you buy or swap.
Tonneau covers that fit the Ram 3500
Not sure a cover will fit? Run the Ram 3500 fitment checker → for your bed length, the cover types that fit, and any Ram 3500-specific gotchas.
Hands-on Ram 3500 cover reviews are landing soon. In the meantime, browse vetted, correctly-sized options for your bed:
Ram 3500 bed size — frequently asked
What bed sizes does the Ram 3500 come in?
The Ram 3500 has been offered with 2 bed lengths: 6.4 ft (76.3") and 8 ft (98.3"). The exact bed on your truck depends on its model year and cab — choose your year above to see which covers fit.
How do I measure my Ram 3500 bed length?
Measure the inside floor of the bed, from the bulkhead (the wall behind the cab) to the inside of the closed tailgate. Round to the nearest standard size — tonneau covers are sold by bed-length category (e.g. 5.5 ft, 6.5 ft, 8 ft), not the exact inch.
What bed size is the newest Ram 3500?
The current Ram 3500 (2019–present) comes with 6.4 ft (76.3") and 8 ft (98.3").
Will a tonneau cover from an older Ram 3500 fit a newer one?
Not necessarily. Covers are matched to a specific generation and bed length, and both the bed length and the rail design can change between generations. Always match your exact model year and bed size before buying — the year-by-year table below shows where the Ram 3500 changed.
Will a 4×8 sheet of plywood fit in a Ram 3500?
Yes — the longest Ram 3500 bed on record is 98.3", so a full 4×8 sheet lies flat with the tailgate closed. Width matters too: a 48-inch sheet only lies flat on the floor if the gap between the wheel wells is wider than 48 inches — on mid-size trucks it rides on top of the wheel arches instead.
What's the difference between the short and long bed Ram 3500?
Across the model's history the beds run from 76.3" to 98.3" — a difference of 22 inches of usable floor. The longer bed hauls more and takes longer sheet goods, the shorter bed is easier to park and turn. They take different tonneau covers, so the bed you have decides which cover part number you order.
How much can a Ram 3500 tow?
Properly equipped, the Ram 3500 has been rated up to 37,090 lb across the generations on this page, with a maximum payload of about 7,680 lb. Those are best-case figures for a specific engine, cab and axle combination — your truck's door-jamb sticker and owner's manual are the numbers that count. Run them through the towing and payload calculators to see what's actually left for a trailer once passengers and gear are on board.
What cab configurations does the Ram 3500 come in?
The Ram 3500 has been offered as Regular Cab, Crew Cab, Mega Cab and Quad Cab. Cab choice is what usually decides bed length — a bigger cab on the same wheelbase means a shorter bed, which is why two trucks from the same year can need different covers.
Does a tonneau cover on a Ram 3500 improve gas mileage?
A little, and only at highway speed. Independent testing puts the gain on a typical pickup at roughly 1–2%, which is real but small — on most Ram 3500 trucks that's a few dollars a tank, not a payback plan. Buy a cover for the dry, locked, secure bed; treat the mileage as a bonus.
