2015 RAM Trucks 3500 SLT Tires

The 2015 RAM Trucks 3500 SLT uses three primary tire sizes: 235/80R17, 275/70R18, and 285/60R20. These are all radial fitments, but they do not apply across the board. Dual rear wheel versions use 235/80R17, Regular Cab models use 275/70R18, and certain Crew Cab and Mega Cab trucks can use either 275/70R18 or 285/60R20 depending on wheel setup.

The practical step is to verify the exact sub-model and the wheel diameter currently on the truck before choosing a replacement. A 17-inch, 18-inch, or 20-inch wheel requires its matching tire size, and trucks with changed wheels or aftermarket packages should be checked carefully before any tire decision is made.

A 2015 RAM Trucks 3500 SLT can use 17-inch, 18-inch, or 20-inch rims, depending on the specific configuration. The 235/80R17 fitment uses a 17-inch rim, 275/70R18 uses an 18-inch rim, and 285/60R20 uses a 20-inch rim. Rim diameter is one of the key reasons this truck has more than one valid tire size.

Checking the wheel itself matters more than assuming by cab style alone, especially on trucks that may have been upgraded or modified. The tire size must match the actual rim diameter, and wheel width should also be checked against the tire’s approved range before replacing a heavy-duty truck tire.

The 2015 RAM Trucks 3500 SLT has more than one tire size because fitment changes by configuration and wheel package. Dual rear wheel trucks use 235/80R17, while many single rear wheel trucks use 275/70R18. Certain Crew Cab and Mega Cab versions can also appear with 285/60R20, which adds a third fitment tied to a different rim diameter.

That means tire selection starts with identifying the truck exactly as it sits today, not just by year and trim name. Cab style, drive layout, DRW versus single rear wheel, and current wheel diameter all matter. Choosing by appearance alone can easily lead to the wrong size on this particular RAM 3500 SLT.

Start with the correct primary size for the truck’s exact configuration: 235/80R17, 275/70R18, or 285/60R20. From there, look at radial construction, the intended wheel diameter, and whether the truck is a dual rear wheel or single rear wheel setup. Those basics matter more than brand preference because they establish whether the tire is even appropriate for the truck.

Next, compare details that affect real-world use, such as rim-width range, load capacity at the stated pressure, and the kind of driving the truck sees. A 3500 SLT used for towing, hauling, or mixed on-road and off-road duty deserves a replacement tire chosen with wheel compatibility and workload in mind.

Current product choices for the 2015 RAM Trucks 3500 SLT include more than one sidewall presentation. The 235/80R17 BFGoodrich All-Terrain T/A KO2 uses an RBL sidewall, while the 275/70R18 version uses RWL, or raised white letter styling. Sidewall treatment does not change the basic fitment, but it does affect how the truck looks once the tires are installed.

Appearance can matter on a heavy-duty pickup, especially when the goal is to preserve a clean stock-style look or add a more assertive all-terrain presentation. Sidewall style should still remain a secondary choice after confirming the correct size, wheel diameter, and load-related tire specifications for the truck.

BFGoodrich is represented in the currently available product selection for the 2015 RAM Trucks 3500 SLT, with All-Terrain T/A KO2 options in 235/80R17 and 275/70R18. Those products keep the focus on radial truck fitment and all-terrain-style use rather than a broad mix of touring or passenger-car tire categories.

Brand is only one part of the decision on a 3500 SLT. It still makes sense to compare the exact tire size, rim-width range, sidewall style, and load figure tied to the tire before making a final choice, especially on a truck that may spend time towing or carrying heavier loads.

Correct tire fitment matters even on a modern heavy-duty truck like the 2015 RAM Trucks 3500 SLT because the tire helps define both stance and function. A DRW truck on 235/80R17 presents differently from a single rear wheel model on 275/70R18 or a 20-inch-equipped Crew Cab or Mega Cab on 285/60R20.

Restoration-minded buyers should match the tire to the wheel diameter and configuration the truck is actually meant to represent. When exact historical presentation matters, it is worth checking original sales literature, window-sticker documentation, or marque-specific reference material before choosing a sidewall style or wheel-and-tire combination.

On the 2015 RAM Trucks 3500 SLT, the primary fitments are radial tires, so construction itself is not a bias-ply-versus-radial styling debate. Appearance is shaped more by the size and wheel package, such as 17-inch DRW, 18-inch single rear wheel, or 20-inch fitment, along with sidewall details like RBL or raised white letters.

That makes the visual goal fairly straightforward: keep the truck in the right size for its intended configuration, then decide how subtle or aggressive the sidewall presentation should be. Even on a newer collector-minded truck, a mismatched wheel diameter or oversized look can change the character more than many buyers expect.

Yes, modifications can affect tire fitment on a 2015 RAM Trucks 3500 SLT. Aftermarket wheels, suspension lifts, leveling kits, lowering changes, and even different offsets can alter the space available for 235/80R17, 275/70R18, or 285/60R20 tires. That matters because this truck already spans multiple factory wheel diameters and body configurations.

A truck that has been changed from stock should be checked at the wheel, not guessed from the badge or trim alone. Tire replacement on a modified 3500 SLT should include confirmation of rim diameter, rim width, steering clearance, and clearance at full suspension movement before settling on any size.

Before road use, inspect tire pressure, wheel-lug condition, valve stems, tread and sidewalls, and general wheel condition. On a 2015 RAM Trucks 3500 SLT, it also makes sense to confirm that the tire size matches the truck’s actual wheel diameter and configuration, especially if the truck is a DRW model or has had wheel changes over time.

A short test drive should be followed by another visual check for rubbing, uneven seating, or signs of air loss. Heavy-duty pickups also deserve a close look at suspension condition, steering response, and any unusual contact points, since a tire can be correct in size yet still reveal problems elsewhere on the truck.

Tires on a 2015 RAM Trucks 3500 SLT should be maintained with regular pressure checks, visual inspection for cuts, bulges, cracking, and uneven wear, and prompt attention to any air loss. Because this is a heavy-duty truck, maintenance is not just about tread life. Load-related use places added importance on keeping the tires properly matched to the wheel and used within their intended specification.

Trucks that sit for long periods should still have their tires inspected routinely, since age and storage conditions can matter even when mileage is low. It also helps to recheck condition before towing, hauling, or taking a longer drive, rather than assuming a tire is ready simply because the truck has not been used much.