What size tonneau cover fits a Ram TRX?

The Ram 1500 TRX is built only as a crew cab with the 5-foot-7-inch (5'7") bed, so you want a cover listed for the 2019-and-newer Ram 1500 (DT platform) 5'7" bed. Do not buy a cover listed for the older Ram 1500 Classic or for the 6'4" bed — neither fits. Always confirm the listing calls out the 5'7" DT bed and your model year.

Do I need a RamBox-specific tonneau cover?

Only if your truck is equipped with the RamBox cargo boxes in the bed rails — those boxes narrow the usable bed width, so a standard-width cover will not clamp correctly and you need a RamBox-compatible version. Check your own truck's bed rails before ordering; if there are no in-rail storage boxes, buy the standard 5'7" cover.

Are hard or soft tonneau covers better for a TRX?

Soft roll-up and soft tri-fold covers are lighter, cheaper, and fastest to remove for full bed access — good if you haul often or want a low-cost weather cover. Hard folding and retractable covers cost more but add real security, better weather sealing, and a more finished look. For a truck people notice, many TRX owners lean hard folding for the balance of security and bed access.

Will a tonneau cover fit with the TRX's bed step or cargo accessories?

Usually yes, but bed-mounted accessories change the equation. A bed extender, bed divider, or aftermarket rack can interfere with clamp locations or a rolling canister. If your TRX has the bed utility group, a cargo camera, or added rails, confirm compatibility with the specific cover before buying — this is exactly the kind of fitment detail worth reading the reviews for.

Best Tonneau Covers for the Ram TRX: Buyer's Guide

A tonneau cover is one of the highest-value things you can bolt to a Ram 1500 TRX. It protects gear from weather and prying eyes, cleans up the truck’s profile, and — on a 702-horsepower supercharged truck that spends time at highway speed — can even claw back a touch of aerodynamic efficiency over an open bed. But “tonneau cover” covers a lot of ground, from an entry-level soft roll-up to a motorized retractable, and the TRX’s specific bed adds a couple of fitment gotchas worth knowing before you spend.

This guide walks the cover types, what each is good at, and the exact TRX bed details you need to match. For the year-by-year picture of what fits your truck, pair this with our TRX fitment guide by year; for the rest of the outside of the truck, see the best TRX exterior accessories roundup and the exterior category.

First, the TRX bed: what you’re fitting

Before you shop covers, nail down three facts about your truck:

Bed length: 5’7”. The Ram 1500 TRX is built only in crew-cab form with the short 5-foot-7-inch bed. There is no 6’4” TRX. Buy a cover listed for the 5’7” bed and nothing else.
Platform: DT, 2019+ Ram 1500. The TRX rides on the fifth-generation “DT” Ram 1500 (2021–2024). Covers are usually listed as “2019–2024 Ram 1500 (New Body Style)” — that’s the right family. Avoid anything listed for the Ram 1500 Classic, which is the older body sold alongside it and uses a different bed.
RamBox or no RamBox. If your bed rails have the in-rail RamBox storage boxes, they narrow the usable bed and you need a RamBox-compatible cover. If your rails are plain, buy the standard version. Look at your own truck before ordering.

Get those three right and the vast majority of Ram 1500 covers on the market will fit. Get one wrong and you’ll be shipping a cover back.

Cover types, ranked by what they’re good at

Soft roll-up

The entry point. A vinyl or fabric cover on tension rails that rolls up toward the cab. Cheapest to buy, lightest, and the fastest to clear the whole bed when you need to throw in something tall. The trade-offs: least security (it’s fabric), the most exposure to standing water in a hard rain, and a less finished look. A great choice if the cover’s main job is keeping weather and eyes off your gear on a budget.

Soft tri-fold

Three fabric panels on a frame that fold forward in sections. You get partial bed access without removing anything, a cleaner look than a roll-up, and still-modest weight and price. Sealing and security sit a notch above a roll-up. This is the sweet spot for a lot of daily-driver TRXs.

Hard tri-fold / hard folding

The same fold-forward idea in aluminum or composite panels. Now you’ve got real security, far better weather sealing, and a premium, color-matched-ish look that suits a truck as loud as a TRX. Panels are heavier and the price climbs, but for many owners this is the best overall balance — secure when closed, quick to fold up when you need the bed.

Retractable

The panels retract into a canister at the front of the bed on tracks — manual or powered. Best-in-class security and a very clean look, and you can lock it at any point along the rail. Downsides: the canister eats a few inches of bed length, it’s the priciest option, and there’s more hardware to keep clean on a truck that sees dust and mud. Worth it if security and finish are your top priorities.

One-piece hard cover / retractable hybrids

Hinged one-piece hard covers exist too; they seal and secure well but need clearance to lift and don’t fold for partial access. Niche for the TRX, but worth knowing they’re out there.

How to choose

Work down this short list and the decision usually makes itself:

How often do you need the whole bed open? Often → roll-up or tri-fold. Rarely → retractable or hard folding is fine.
How much does security matter? Parking downtown or hauling tools → hard folding or retractable. Weather-only → soft is plenty.
Budget. Soft roll-up is the value play; retractable is the premium end; hard tri-fold splits the difference and is where a lot of TRX owners land.
Weather sealing. If your gear can’t get wet, prioritize a hard cover with good drainage channels over a basic roll-up.

Whatever you pick, the fitment rules above don’t change: 5’7” bed, DT (2019+, not Classic), RamBox or not.

Buying new vs. used or OEM

New covers ship complete with fresh seals and hardware — see the exterior category for what’s available. But tonneau covers are also a strong used buy: they’re commonly sold off when owners change trucks, and a lightly used hard folding or retractable cover can be a fraction of new. That’s where eBay Motors earns its keep — filter by the 5’7” Ram 1500 bed, confirm the seller’s fitment and condition notes, and check that all rails, clamps, and hardware are included.

Use the eBay Motors buttons below to jump straight to covers that fit the TRX bed, then round out the build with the rest of the exterior accessories and, if you tow, our towing & hauling accessories picks.

Start with a cover that matches how you actually use the bed — the “best” tonneau is the one you’ll keep closed because it’s no hassle to open.