Our top pick: the UWS UWS EC10473 69-inch Heavy-Wall Aluminum Crossover.
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The Ram 1500's exterior bed rail width of about 66 inches is the widest of the four trucks this site covers, which means full-size crossover boxes fit with the most margin of any of them. The whole 69 and 72 inch market is open.
The Ram-specific complication is RamBox, and it changes the recommendation rather than just the fitment. A RamBox truck already has two lockable, weather-sealed rail-level compartments — which is most of what a side box provides — so the box you need is probably a different shape.
Non-RamBox: buy a full-size crossover, and the UWS is the one. RamBox: buy a chest box on the floor instead and let RamBox handle the small items.
How we ranked these for this truck
Build. Lid construction and wall thickness.
Weather seal. Seal design plus lid rigidity.
Security. Latch mechanism and lock points.
Bed usability. The Ram's 51.0 in wheelhouse width is the most generous here, which helps the floor-mounted formats score well.
Heavy-wall aluminum, a foam-filled RigidCore lid that does not flex when you sit on it, and a low profile that still clears most rear glass. This is the crossover to buy if you intend to keep the truck.
Who should skip it. Skip it on a 5'5" short bed. At 69 inches it will sit on the rails, but you lose a disproportionate share of a short bed and the money is better spent on a side-mount pair.
Build
9.4
Weather seal
8.8
Security
8.6
Bed usability
8.0
Value
7.4
What works
+Foam-filled lid does not oil-can under body weight
+Low profile clears rear glass on most full-size crew cabs
+Heavy-wall extrusion survives being used as a step
+Gas struts are serviceable rather than sealed units
What does not
−Among the most expensive aluminum crossovers on the shelf
−69 in is a full-size length — not a mid-size answer
11.0 cu ft of aluminum in the low-profile saddle format that fleets have standardized on for decades. It is the box every other box gets compared with, and the reason is parts availability and a lid that stays sealed.
Who should skip it. It is the most expensive way to store tools in a pickup bed short of a drawer system. If this is a personal truck that sees a job every other weekend, the money is better spent elsewhere.
Build
9.6
Weather seal
9.4
Security
8.8
Bed usability
8.2
Value
6.8
What works
+11.0 cu ft published — not an estimate
+Weather Guard latch and seal hardware is available decades out
A 30 in, 17 in deep triangle box with multi-tier interior trays. The triangle shape sits in the bulkhead corner of the bed, and it is the only chest format that gives you drawers rather than a pit.
Who should skip it. It is heavy and it is expensive for its volume. If you just need a sealed box for straps and chains, the money is wasted.
Build
9.2
Weather seal
8.0
Security
8.4
Bed usability
7.6
Value
7.0
What works
+Organized interior rather than one deep well
+Triangle footprint uses dead bulkhead corner space
The narrow-body crossover. It eats noticeably less fore-aft bed length than a standard 19-20 in box, which is the whole point on a 5'5" or 5'7" bed where every inch in front of the wheel wells matters.
Who should skip it. If you carry long power tools in cases, the narrow body will fight you. A 19 in box swallows a circular saw case flat; this one does not.
Build
7.6
Weather seal
7.4
Security
7.2
Bed usability
9.2
Value
8.8
What works
+Gives back several inches of bed floor versus a standard-width box
+Light enough for a one-person install
+Cheapest route into a real aluminum crossover
What does not
−Narrow interior will not take large tool cases flat
−Thinner material than the heavy-wall boxes
−Published dimensions vary by listing — measure before you order
A 72 x 13 x 16 in aluminum topsider that bolts along the bed rail and leaves the floor completely clear. For anyone who hauls sheet goods or a pallet, this is the right shape of tool box and a crossover is the wrong one.
Who should skip it. It consumes rail space, so a tonneau cover and a bed rack both get complicated. If a cover is non-negotiable, go crossover and give up the floor instead.
Build
9.0
Weather seal
8.4
Security
8.2
Bed usability
9.6
Value
7.6
What works
+Bed floor stays completely usable
+Long and shallow suits hand tools and cordless kits better than a deep well
+Buyers parts and latches are stocked everywhere
What does not
−Requires drilling the bed rail on most trucks
−Blocks a tonneau cover and most bed racks
−One box covers one side only — pairs get expensive
Full-size beds with 72 in or more of straight rail
Trucks that haul flat loads on the bed floor
✗ Does not fit
Mid-size beds
Trucks running a tonneau cover or bed rack
The non-RamBox truck
Straightforward: a full-size crossover box, clamped rather than drilled, with the lid construction being the thing you pay for. The 66-inch rail width gives a 69-inch box a comfortable margin on each side, and on the 6'4" bed a standard-depth box leaves about 57 inches of floor.
On the 5'7" bed the calculation is the same as any short bed: 19 inches of a 67.4-inch floor is a lot, and a narrow-body box or a side-mount box is worth considering.
The RamBox truck
Different problem. You already have lockable storage at rail level, so what is missing is somewhere for cased power tools — which RamBox will not take. Two formats answer that without fighting the rail:
A chest box on the bed floor. Uses no rail at all, so the RamBox lids stay fully usable. A triangle box in the bulkhead corner is the tidiest version of this.
A drawer system. The Ram drawer systems are available in RamBox fitment, and the combination of RamBox for small items plus drawers for tools is genuinely good.
Fitment confirmation before you order
RamBox or not. Look at the bed walls. This is the first filter.
New body or Classic. From 2019 both were sold. Clamp kits are sometimes listed per body style.
Exterior rail width. Expect about 66 in, outside to outside across the rail tops nearest the cab.
Check the manufacturer's chart for your year. As always, the chart is the authority.
What we would actually buy
Non-RamBox 6'4" bed: the UWS heavy-wall crossover. Best lid in the category, and the bed length absorbs the depth without complaint.
Non-RamBox 5'7" bed: the narrow-body crossover, or a 72-inch topsider if the floor matters more than the rail.
RamBox truck: a triangle chest box in the bulkhead corner. It uses dead space, leaves both RamBox lids working, and covers the one thing RamBox cannot — cased power tools. Chest boxes, ranked.
Questions people actually ask
What is the best tool box for a Ram 1500?
On a non-RamBox truck, a full-size heavy-wall aluminum crossover — the 66 in rail width gives a 69 in box the most margin of any truck here. On a RamBox truck, a chest box on the floor, because RamBox already covers the small items and the lids interrupt the rail a clamp needs.
Will a crossover tool box fit a RamBox bed?
It has to be checked rather than assumed. The RamBox lids sit in the rail line and a crossover clamp needs continuous rail lip. Some boxes publish explicit RamBox fitment; most say nothing, and silence is not a clearance.
Do I need a tool box if I have RamBox?
You need a different shape of one. RamBox gives you two lockable weather-sealed rail-level compartments, which covers hand tools, fasteners and consumables. What it will not take is cased power tools, so a chest box or a drawer system is the right complement.
Will a 69 inch box fit a Ram 1500 5'7 bed?
Yes on a non-RamBox truck — the rail width is the constraint, not the bed length, and 66 in of rail takes a 69 in box comfortably. What the short bed costs you is floor: about 48 in of the 67.4 in remains behind a standard-depth box.
Does the Ram Classic take the same tool box?
The box usually does, because it clamps to the rail lip. The clamp kit is sometimes listed per body style, so check. For covers, liners and racks the Classic-versus-new-body split matters considerably more.
Last reviewed October 5, 2026. Think a figure here is wrong? Tell us at contact@toolboxandtruck.com and we will check it, fix it and date the correction — see our editorial policy.
