The 2013 RAM Trucks 3500 ST sits in the heavy-duty pickup world where payload, towing, and long-wheelbase stability matter just as much as everyday road manners. Buyers looking at this truck usually need tire fitment that matches the exact wheel and axle configuration, because single-rear-wheel and dual-rear-wheel versions do not use the same size. This model uses radial tires in either 275/70R18 or 235/80R17, depending on sub-model. Available choices here stay focused on BFGoodrich All-Terrain T/A KO2 fitments, with different sidewall treatments tied to the size. The key is confirming whether the truck is SRW or DRW, then matching tire size, wheel diameter, and intended use before replacement.
Which Tire Size Is Right for The 2013 RAM Trucks 3500 ST
The 2013 RAM Trucks 3500 ST uses two primary tire sizes, and the correct one depends on the exact sub-model and wheel setup. The first thing to confirm is whether the truck is a single-rear-wheel or dual-rear-wheel version, because that also determines whether it uses a 17-inch or 18-inch rim. Once that is settled, the decision shifts to selecting the right radial tire within the proper size and wheel-width range.
A 275/70R18 tire uses a 275-millimeter nominal section width, a 70-series aspect ratio, radial construction, and an 18-inch rim diameter. On the 2013 RAM Trucks 3500 ST, this is the radial fitment used on the non-DRW 4x2 and 4x4 configurations. In this size, the available BFGoodrich option comes from the All-Terrain T/A KO2 line with a raised white letter sidewall treatment. This size is the one to evaluate when the truck has single rear wheels and you want to confirm the existing 18-inch wheel setup before replacement.
A 235/80R17 tire uses a 235-millimeter nominal section width, an 80-series aspect ratio, radial construction, and a 17-inch rim diameter. On the 2013 RAM Trucks 3500 ST, this size belongs to the dual-rear-wheel 4x2 and 4x4 versions rather than the single-rear-wheel trucks. The available BFGoodrich All-Terrain T/A KO2 option in this fitment uses an RBL sidewall style and a different rim-width range from the 18-inch size. This is the size to compare when the truck is a DRW model and wheel diameter needs to stay consistent with the current setup.
Sub-model fitment matters on the 2013 RAM Trucks 3500 ST because tire size changes with the truck's rear-wheel configuration. Single-rear-wheel models use one size, while dual-rear-wheel models use another, so identifying the exact 4x2, 4x4, or DRW setup is the first step before selecting tires.
1
2013 RAM Trucks 3500 ST 4x2
The 2013 RAM Trucks 3500 ST 4x2 uses the 275/70R18 radial fitment rather than the DRW truck's 17-inch size. That makes tire selection more about confirming the existing 18-inch wheel setup and choosing the right all-terrain radial for road use, work use, or mixed-duty driving.
The 2013 RAM Trucks 3500 ST 4x2 (DRW) uses the 235/80R17 radial size tied to the dual-rear-wheel configuration. Tire selection here starts with keeping the correct 17-inch fitment in place and making sure any replacement matches the truck's wheel width and intended heavy-duty use.
The 2013 RAM Trucks 3500 ST 4x4 uses the same 275/70R18 radial size as the 4x2 single-rear-wheel truck. That keeps fitment straightforward, but it is still worth checking the actual wheel size on the truck before comparing tread style, sidewall appearance, and load-related specifications.
The 2013 RAM Trucks 3500 ST 4x4 (DRW) uses the 235/80R17 radial fitment associated with the dual-rear-wheel setup. Choosing tires for this version means staying with the correct DRW size and confirming wheel compatibility before focusing on tread pattern or sidewall presentation.
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 2013 RAM Trucks 3500 ST Tires for Sale
Available tire choices for the 2013 RAM Trucks 3500 ST center on BFGoodrich All-Terrain T/A KO2 radials in both primary sizes. The 18-inch and 17-inch fitments differ in sidewall treatment and rim-width specification, so the product grid is most useful once the truck's exact wheel and rear-wheel configuration are confirmed.
These FAQs focus on the exact tire sizes used on the 2013 RAM Trucks 3500 ST, how fitment changes between SRW and DRW versions, and what to compare before choosing, installing, and driving on replacement tires.
Tire Size & Fitment
What tire size fits a 2013 RAM Trucks 3500 ST?
The 2013 RAM Trucks 3500 ST uses either 275/70R18 or 235/80R17, and the correct size depends on the exact sub-model. The 4x2 and 4x4 single-rear-wheel trucks use 275/70R18, while the 4x2 (DRW) and 4x4 (DRW) versions use 235/80R17.
That means the first step is identifying whether the truck is SRW or DRW before comparing tires. The two sizes also use different rim diameters, so checking the wheel already on the truck matters just as much as reading the sidewall size before ordering or mounting replacements.
What size rim does a 2013 RAM Trucks 3500 ST use?
A 2013 RAM Trucks 3500 ST uses either a 17-inch or 18-inch rim, depending on the tire size and sub-model. Trucks fitted with 275/70R18 use an 18-inch rim, while trucks fitted with 235/80R17 use a 17-inch rim.
Rim diameter needs to match the tire size exactly, so this is not a detail to estimate by appearance alone. It is worth checking the markings on the current tire and verifying the actual wheel on the truck, especially if it has had wheel changes, fleet-service replacements, or other modifications over time.
Why does the 2013 RAM Trucks 3500 ST have more than one tire size?
The 2013 RAM Trucks 3500 ST has more than one tire size because its fitment changes between single-rear-wheel and dual-rear-wheel configurations. The SRW 4x2 and 4x4 models use 275/70R18, while the DRW 4x2 and 4x4 models use 235/80R17.
That difference is tied to the truck's wheel setup, not just trim naming. A buyer looking at replacement tires should confirm the exact sub-model and inspect the truck's current wheels before selecting a tire, since choosing by model name alone can lead to the wrong rim diameter and the wrong fitment path.
Choosing the Right Tire
What should I consider when choosing a tire for a 2013 RAM Trucks 3500 ST?
Start with the correct primary size for the truck's exact configuration: 275/70R18 for SRW models or 235/80R17 for DRW models. Both fitments are radial, and the available choices here center on the BFGoodrich All-Terrain T/A KO2, so the key differences are tied to size, wheel compatibility, sidewall style, and load-related specifications.
A smart comparison includes the actual wheel diameter on the truck, the allowed rim-width range, and how the truck is used. A work truck, tow vehicle, or lightly driven personal truck may all point to the same size, but the right choice still depends on matching the tire to the truck's present wheel setup.
What brands offer tires for the 2013 RAM Trucks 3500 ST?
The available products for the 2013 RAM Trucks 3500 ST are from BFGoodrich. Both primary sizes are represented within the BFGoodrich All-Terrain T/A KO2 line, so brand choice is straightforward and the decision becomes more about selecting the correct size and matching it to the truck's wheel configuration.
That narrower brand selection makes the fitment details more important than brand comparison. Focus on whether the truck is SRW or DRW, confirm the rim diameter, and then compare the size-specific details such as sidewall treatment, rim-width range, and load capacity instead of assuming the two available fitments can be used interchangeably.
What sidewall styles are available for 2013 RAM Trucks 3500 ST tires?
The available sidewall styles vary by size on the 2013 RAM Trucks 3500 ST. The 275/70R18 BFGoodrich All-Terrain T/A KO2 uses an RWL sidewall, while the 235/80R17 version uses an RBL sidewall treatment.
That means sidewall appearance is partly tied to the truck's correct fitment rather than being a free choice across both sizes. Once the proper SRW or DRW tire size is confirmed, the sidewall style becomes part of the final selection and can influence whether the truck keeps a more utility-focused or more visually assertive presentation.
Restoration & Appearance
Does correct tire fitment matter for a 2013 RAM Trucks 3500 ST restoration?
Correct tire fitment still matters on a 2013 RAM Trucks 3500 ST restoration or refresh, even though this truck is newer than most collector-era applications. The right size preserves the intended relationship between the wheel, tire, and truck stance, and it also keeps SRW and DRW configurations from being visually and mechanically mismatched.
Appearance is only one part of that decision. A truck being returned to stock-style presentation should have its existing wheel diameter and rear-wheel configuration verified first, since the 17-inch DRW fitment and 18-inch SRW fitment create different visual proportions and require different tires from the start.
How does tire construction affect the appearance of a 2013 RAM Trucks 3500 ST?
The 2013 RAM Trucks 3500 ST uses radial tire fitments, so the main appearance differences here come less from bias-ply-versus-radial construction and more from the exact size and sidewall treatment. A 275/70R18 with raised white letters presents differently than a 235/80R17 with a black sidewall treatment.
That makes wheel and configuration accuracy especially important for a stock-style or clean original-looking truck. Tire appearance should be judged alongside the truck's SRW or DRW setup, ride height, and wheel choice so the finished look stays consistent with the truck's actual stance and intended use.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2013 RAM Trucks 3500 ST?
Yes, modifications can affect tire fitment on a 2013 RAM Trucks 3500 ST. Aftermarket wheels, suspension changes, leveling kits, or other alterations can change how a 275/70R18 or 235/80R17 tire sits in relation to the wheel well, steering components, and overall wheel-width requirements.
A truck that no longer has its original-style wheels should be measured instead of assumed. Checking actual wheel diameter, wheel width, and clearance around suspension and body components is especially important before replacing tires on a modified SRW or DRW truck, since the two factory fitments already begin from different wheel setups.
What should I inspect before driving a 2013 RAM Trucks 3500 ST on new tires?
Before driving a 2013 RAM Trucks 3500 ST on new tires, inspect the wheel condition, verify that the mounted size matches the truck's exact configuration, and confirm proper inflation. It is also wise to look over valve stems, lug hardware, tread seating, and any visible clearance around suspension or body components.
A short initial road check can reveal vibration, rubbing, or steering issues before the truck goes back into regular service. On a heavy-duty pickup, that follow-up is important because load, towing use, and wheel configuration can make small fitment problems show up quickly once the truck is back on the road.
How should tires on a 2013 RAM Trucks 3500 ST be maintained?
Tires on a 2013 RAM Trucks 3500 ST should be maintained with regular pressure checks, routine visual inspection, and close attention to tread wear and sidewall condition. The basics include watching for cracking, cuts, bulges, punctures, and uneven wear, especially on a truck that may alternate between unloaded driving and heavier-duty work.
Maintenance should also include periodic checks for slow air loss and signs that alignment, suspension, or wheel issues are affecting wear. Because this truck uses different sizes for SRW and DRW configurations, replacement and rotation decisions should stay matched to the correct setup rather than treating all 3500 ST tires as one universal fitment.
