The 2020 RAM Trucks 2500 sits in the heavy-duty pickup market where towing, payload, and everyday road use all place real demands on tire fitment. This generation brought a more refined cabin and modern capability, but tire selection still comes down to matching the truck’s exact trim and wheel package. Depending on sub-model, the 2020 RAM Trucks 2500 uses 245/70R17, 285/70R17, 275/70R18, or 285/60R20 radial tires. Available choices here lean toward BFGoodrich All-Terrain T/A KO2 fitments with raised white letter styling. The key is confirming the exact sub-model and wheel diameter first, then choosing a tire that suits how the truck is actually used.
Which Tire Size Is Right for The 2020 RAM Trucks 2500
Four different tire sizes apply to the 2020 RAM Trucks 2500, and they vary by sub-model and wheel package rather than by construction, since all are radial tires. The first step is identifying the exact trim and confirming whether the truck has 17-inch, 18-inch, or 20-inch wheels, because that determines which size should be considered before comparing tire features.
Fit(s): Big Horn, Laramie, Laramie Longhorn, Lone Star, and Tradesman
Construction: Radial|Rim: 18 in
275/70R18 is a metric radial size in which 275 is the nominal section width in millimeters, 70 is the aspect ratio, R identifies radial construction, and 18 is the rim diameter in inches. On the 2020 RAM Trucks 2500, this size appears on 18-inch wheel applications across several sub-models. Available choices in this size include BFGoodrich All-Terrain T/A KO2 with raised white letter sidewalls. This is the size to evaluate when the truck is equipped with the 18-inch setup and the goal is to keep the fitment matched to that wheel package.
Fit(s): Big Horn, Laramie, Laramie Longhorn, Limited, and Lone Star
Construction: Radial|Rim: 20 in
285/60R20 is a metric radial size that uses a 285-millimeter nominal section width, a 60-series profile, and a 20-inch rim diameter. It is one of the larger wheel-package fitments used on the 2020 RAM Trucks 2500 and applies to several upper-trim configurations. This size represents a different wheel and tire combination than the 17-inch and 18-inch applications, so it should be selected only after confirming the truck’s actual wheel diameter. For buyers sorting out trim-based fitment, this size is tied to the 20-inch package rather than being a universal 2500 tire choice.
285/70R17 is a metric radial size where 285 gives the nominal section width in millimeters, 70 is the aspect ratio, and 17 identifies the wheel diameter. On the 2020 RAM Trucks 2500, this size is associated with the Power Wagon and reflects a different 17-inch fitment than the narrower 245/70R17. BFGoodrich All-Terrain T/A KO2 options in this size use raised white letter sidewalls, with more than one load-capacity configuration available. This is the size to verify when the truck is a Power Wagon or already wears the matching 17-inch wheel setup.
245/70R17 is a metric radial tire size with a 245-millimeter nominal section width, a 70-series profile, and a 17-inch rim diameter. On the 2020 RAM Trucks 2500, it appears on certain Tradesman applications and should not be confused with the wider 285/70R17 also used on a 17-inch wheel. BFGoodrich All-Terrain T/A KO2 is available in this size with raised white letter styling. This is the fitment to consider when the truck has the corresponding 17-inch wheel package and the goal is to stay with the proper size for that configuration.
Tire fitment for the 2020 RAM Trucks 2500 depends heavily on sub-model and wheel package, with some trims offering more than one valid size. Checking the exact trim matters because this truck uses 17-inch, 18-inch, and 20-inch applications across the range.
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2020 RAM Trucks 2500 Big Horn
The 2020 RAM Trucks 2500 Big Horn uses either 275/70R18 or 285/60R20 radial tires, depending on its wheel package. Tire selection starts with confirming whether the truck has 18-inch or 20-inch wheels before comparing tread style or other product details.
The 2020 RAM Trucks 2500 Laramie also uses either 275/70R18 or 285/60R20 radial tires. That makes wheel-diameter confirmation the key first step, since both sizes belong to different factory-style wheel setups rather than being interchangeable by trim name alone.
The 2020 RAM Trucks 2500 Laramie Longhorn shares the same two-fitment pattern, using either 275/70R18 or 285/60R20 radial tires. Choosing correctly means matching the tire to the truck’s actual wheel package first, then narrowing the selection within that proper size.
The 2020 RAM Trucks 2500 Limited uses 285/60R20 radial tires. With a single primary size tied to this sub-model, the main decision becomes confirming the 20-inch wheel setup and then selecting the tire characteristics that suit the truck’s intended use.
The 2020 RAM Trucks 2500 Lone Star uses either 275/70R18 or 285/60R20 radial tires. That means the correct choice depends on the actual wheel diameter on the truck, not simply the trim badge, especially if the vehicle has changed hands or been modified.
The 2020 RAM Trucks 2500 Power Wagon uses 285/70R17 radial tires. This fitment stands apart from other 2500 trims, so selection centers on staying with the correct 17-inch size and comparing the available load and specification details within that size.
The 2020 RAM Trucks 2500 Tradesman uses either 245/70R17 or 275/70R18 radial tires. Identifying which wheel package is on the truck is essential here, because the 17-inch and 18-inch fitments are separate starting points for tire selection.
The tire sizes listed on this page assume factory-standard vehicle configuration. The following modifications may affect tire fitment and are not reflected in this guide:
Suspension changes (lowering, lift kits, spring replacements)
Body alterations (fender modifications, custom bodywork)
If your vehicle has been modified from factory specifications, verify tire clearance before purchase.
Best 2020 RAM Trucks 2500 Tires for Sale
Available 2020 RAM Trucks 2500 tire choices center on BFGoodrich All-Terrain T/A KO2 fitments in 245/70R17, 275/70R18, and 285/70R17. The product grid is most useful for comparing the correct size first, then looking at raised white letter styling, rim-width ranges, load ratings, and weight.
Owners shopping tires for a 2020 RAM Trucks 2500 usually need to sort out trim-based size differences, wheel diameter, and the practical differences between the available radial tire options. These FAQs focus on fitment, selection, and road-use checks for this exact truck.
Tire Size & Fitment
What tire size fits a 2020 RAM Trucks 2500?
The 2020 RAM Trucks 2500 uses four tire sizes across its trim range: 245/70R17, 285/70R17, 275/70R18, and 285/60R20. All of these are radial tire fitments, but they do not apply across every version of the truck.
The right choice depends on the exact sub-model and, just as importantly, the wheel package on the truck. A Tradesman, Power Wagon, Big Horn, or Limited can point you to different starting sizes, so checking the trim badge and the actual wheel diameter is the safest way to narrow the fitment before comparing tire options.
What size rim does a 2020 RAM Trucks 2500 use?
A 2020 RAM Trucks 2500 uses 17-inch, 18-inch, or 20-inch rims depending on the sub-model and tire package. The 245/70R17 and 285/70R17 sizes use 17-inch rims, 275/70R18 uses an 18-inch rim, and 285/60R20 uses a 20-inch rim.
Wheel diameter is the first thing to confirm before choosing a tire, because a 17-inch tire cannot be mounted on an 18-inch or 20-inch wheel. On a used truck, that check matters even more if wheels have been changed, since the trim name alone does not always tell you what is currently on the vehicle.
Why does the 2020 RAM Trucks 2500 have more than one tire size?
The 2020 RAM Trucks 2500 has more than one tire size because different sub-models use different wheel and tire packages. Tradesman, Big Horn, Laramie, Laramie Longhorn, Limited, Lone Star, and Power Wagon do not all start from the same wheel diameter or tire specification.
That means tire shopping begins with configuration, not just year and model. A Power Wagon points to 285/70R17, a Limited uses 285/60R20, and several trims can use either 18-inch or 20-inch setups. Matching the tire to the truck’s actual trim and wheel package prevents ordering a size that belongs to another 2500 configuration.
Choosing the Right Tire
What should I consider when choosing a tire for a 2020 RAM Trucks 2500?
Start with the correct size for the truck’s trim and wheel diameter, since the 2020 RAM Trucks 2500 uses four different radial fitments. After that, compare the tire’s intended use, rim-width range, load capacity, and other specification details within the correct size.
A truck used mainly on pavement may call for different priorities than one that sees regular jobsite, towing, or off-road use. It also helps to confirm whether the truck still has its original wheel package, because selecting a tire before checking wheel diameter and width can lead to choosing an option that belongs to a different 2500 setup.
What sidewall styles are available for 2020 RAM Trucks 2500 tires?
The available 2020 RAM Trucks 2500 products here use RWL sidewalls, which means raised white letter styling. That sidewall treatment appears on the BFGoodrich All-Terrain T/A KO2 options offered in the applicable sizes.
Sidewall style affects the truck’s visual presentation as much as the tire specification itself. Raised white letters give the tire a more assertive, off-road-oriented look, so buyers who care about appearance should weigh that choice alongside the correct size, wheel compatibility, and the way the truck is actually driven.
What brands offer tires for the 2020 RAM Trucks 2500?
The available tire options for the 2020 RAM Trucks 2500 here come from BFGoodrich. The applicable products are part of the All-Terrain T/A KO2 line in the supported 17-inch and 18-inch fitments shown for this truck.
Brand is only one part of the selection process, especially on a truck with multiple valid sizes across the trim range. After confirming the correct fitment, it makes sense to compare the specific KO2 specifications such as load capacity, rim-width range, and the exact size tied to the truck’s wheel package.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2020 RAM Trucks 2500?
Yes, modifications can affect tire fitment on a 2020 RAM Trucks 2500 even when the tire size is correct for a stock configuration. Aftermarket wheels, suspension changes, leveling kits, or body alterations can change clearance, wheel width, and the relationship between the tire and the truck.
That is especially important on a model range that already uses several factory tire sizes and three different rim diameters. Any truck that has been altered should be checked for actual wheel diameter, width, and steering or fender clearance before replacement tires are chosen, rather than relying only on the original trim-based fitment.
What should I inspect before driving a 2020 RAM Trucks 2500 on new tires?
Before driving a 2020 RAM Trucks 2500 on new tires, inspect inflation pressure, wheel-lug torque, valve stems, and the general condition of the wheels. It is also wise to look for any signs of rubbing at full steering lock and check that the tire size matches the truck’s wheel diameter and intended position.
A short test drive followed by a second inspection can catch problems early, especially on a heavy-duty truck that may carry or tow substantial loads. Uneven ride height, worn suspension parts, or alignment issues can also affect how a new tire behaves, so those items deserve attention before putting the truck into regular use.
How often should tires on a 2020 RAM Trucks 2500 be inspected?
Tires on a 2020 RAM Trucks 2500 should be inspected regularly, not just when tread looks worn. Pressure, tread condition, sidewall cracking, cuts, bulges, and uneven wear are all worth checking on a routine basis, especially on a truck used for towing, hauling, or rough-surface driving.
A monthly visual check is a sensible baseline, with additional inspection before longer trips or heavier work. Trucks that sit for extended periods still need attention, because age, slow air loss, and environmental exposure can affect tire condition even when mileage is low, and that can matter just as much as tread depth.
