The 2015 RAM Trucks 3500 Laramie Longhorn sits at the luxury end of the heavy-duty pickup market, combining one-ton capability with a more upscale trim and road-going presence than a work-truck-spec 3500. That matters when choosing tires, because this exact model can use three different radial sizes depending on whether it is a single-rear-wheel or dual-rear-wheel truck and which wheel package it carries. Single-rear-wheel trucks use 275/70R18 or 285/60R20, while DRW versions use 235/80R17. Tire selection here starts with confirming the truck's exact configuration, then comparing load-capacity, rim-width, sidewall, and use-case details that suit towing, hauling, and everyday driving.
Which Tire Size Is Right for The 2015 RAM Trucks 3500 Laramie Longhorn
Three tire sizes apply to the 2015 RAM Trucks 3500 Laramie Longhorn, and they do not all serve the same configuration. The first step is identifying whether the truck is 4x2 or 4x4, and more importantly whether it is a single-rear-wheel or dual-rear-wheel model. Rim diameter also changes across these fitments, so the wheel on the truck needs to be confirmed before comparing tires.
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 wheel diameter in inches. On the 2015 RAM Trucks 3500 Laramie Longhorn, this size applies to single-rear-wheel configurations rather than DRW trucks. Available choices in this size include a BFGoodrich All Terrain TA KO2 with raised white letter styling. It is a useful fitment to evaluate when the truck carries 18-inch wheels and the goal is a heavy-duty radial with all-terrain character.
285/60R20 is also a metric radial size, with a 285-millimeter nominal section width, a 60-series profile, radial construction, and a 20-inch rim requirement. This size belongs to single-rear-wheel versions of the 2015 RAM Trucks 3500 Laramie Longhorn and should not be treated as a DRW fitment. Its sizing points to a different wheel package than the 18-inch option, so wheel diameter confirmation is essential before moving ahead. Buyers typically reach this size after verifying the truck already wears 20-inch wheels and then comparing tire construction, load details, and intended road use.
235/80R17 uses the same modern metric radial format, with 235 indicating nominal section width in millimeters, 80 showing the aspect ratio, and 17 identifying the rim diameter. On the 2015 RAM Trucks 3500 Laramie Longhorn, this size is tied to dual-rear-wheel configurations, making it a distinct fitment from the single-rear-wheel 18-inch and 20-inch setups. Available options include a BFGoodrich All Terrain TA KO2 with black sidewall styling. This is the size to consider only after confirming the truck is a DRW model and that the wheel setup remains correct for that application.
Sub-model fitment matters on the 2015 RAM Trucks 3500 Laramie Longhorn because single-rear-wheel and dual-rear-wheel trucks do not use the same tire size. Some sub-models also share more than one size depending on wheel package, so the truck's exact configuration and wheel diameter should be confirmed before selecting a tire.
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2015 RAM Trucks 3500 Laramie Longhorn 4x2
The 4x2 single-rear-wheel model uses either 275/70R18 or 285/60R20, both in radial construction. Tire selection starts with confirming whether the truck has 18-inch or 20-inch wheels, then comparing the available product details within the correct size.
The 4x2 DRW version uses 235/80R17 radial tires rather than the larger single-rear-wheel sizes. That makes it important to match the truck's dual-rear-wheel setup first, then review load-capacity, rim-width, and sidewall details within the proper 17-inch fitment.
The 4x4 single-rear-wheel model shares the same two primary radial sizes as the 4x2 truck: 275/70R18 and 285/60R20. Choosing between them is not a matter of preference alone, since the correct tire depends on which wheel diameter is actually on the truck.
The 4x4 DRW model uses 235/80R17 radial tires, setting it apart from the 18-inch and 20-inch single-rear-wheel fitments. Buyers looking at this sub-model should verify the dual-rear-wheel arrangement and wheel dimensions before comparing specific tire options.
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 2015 RAM Trucks 3500 Laramie Longhorn Tires for Sale
Available products center on BFGoodrich All Terrain TA KO2 fitments for 275/70R18 and 235/80R17. The main points to compare in the product grid are size, load capacity at stated pressure, rim-width range, and sidewall presentation, including raised white letter and black sidewall styles.
Questions for the 2015 RAM Trucks 3500 Laramie Longhorn usually center on the correct tire size for SRW versus DRW trucks, wheel diameter, available radial choices, and the fitment checks worth making before towing, hauling, or longer road use.
Tire Size & Fitment
What tire size fits a 2015 RAM Trucks 3500 Laramie Longhorn?
The 2015 RAM Trucks 3500 Laramie Longhorn uses three possible tire sizes: 275/70R18, 285/60R20, and 235/80R17. Single-rear-wheel 4x2 and 4x4 trucks use either 275/70R18 or 285/60R20, while dual-rear-wheel 4x2 and 4x4 versions use 235/80R17.
The right choice depends on the truck's exact configuration and wheel setup, not just the trim name. A Laramie Longhorn owner should confirm whether the truck is SRW or DRW and then verify whether it carries 17-inch, 18-inch, or 20-inch wheels before selecting a tire.
What size rim does a 2015 RAM Trucks 3500 Laramie Longhorn use?
Rim diameter varies on the 2015 RAM Trucks 3500 Laramie Longhorn. The supported fitments use 17-inch, 18-inch, or 20-inch wheels depending on the tire size and truck configuration, with 235/80R17 on DRW models and 275/70R18 or 285/60R20 on SRW models.
That makes wheel confirmation one of the first fitment checks to make, especially on a used truck that may have had wheels changed. The tire size molded on the current tire, the actual wheel diameter, and whether the truck is single- or dual-rear-wheel should all agree before a replacement is chosen.
Why does the 2015 RAM Trucks 3500 Laramie Longhorn have more than one tire size?
More than one tire size appears because the 2015 RAM Trucks 3500 Laramie Longhorn covers different wheel packages and two distinct rear-wheel configurations. Single-rear-wheel trucks use 275/70R18 or 285/60R20, while dual-rear-wheel versions use 235/80R17.
The sizes are tied to how the truck is equipped rather than giving every truck a free choice among all three. A replacement decision should start by identifying the sub-model and then confirming the wheel diameter on the vehicle, since the DRW fitment and SRW fitments are not interchangeable choices.
Choosing the Right Tire
What should I consider when choosing a tire for a 2015 RAM Trucks 3500 Laramie Longhorn?
Start with the correct primary size for the truck's exact setup: 275/70R18 or 285/60R20 for single-rear-wheel models, or 235/80R17 for dual-rear-wheel models. From there, compare radial construction details, wheel diameter, load capacity at the stated pressure, and any rim-width requirements tied to the tire.
Intended use matters as much as size. A truck used for towing or hauling should be matched carefully to its load needs, while a truck driven more lightly may place more emphasis on tread style and appearance. Sidewall treatment and wheel compatibility are also worth checking before making a final selection.
What sidewall styles are available for 2015 RAM Trucks 3500 Laramie Longhorn tires?
Sidewall styling varies by size among available tires for the 2015 RAM Trucks 3500 Laramie Longhorn. The 275/70R18 BFGoodrich All Terrain TA KO2 uses RWL styling, while the 235/80R17 BFGoodrich All Terrain TA KO2 uses RBL styling.
That difference can affect the truck's overall look even when the tire remains within the proper fitment. Buyers who care about presentation should compare the sidewall treatment alongside the correct size and wheel diameter, since appearance options are tied to the specific tire size rather than being universal across every 3500 Laramie Longhorn setup.
What tire series are available for the 2015 RAM Trucks 3500 Laramie Longhorn?
The available products shown for the 2015 RAM Trucks 3500 Laramie Longhorn are in the BFGoodrich All Terrain TA KO2 series. That series appears in both 275/70R18 and 235/80R17 fitments, covering an SRW option and a DRW option within the correct size range for this truck.
Series choice helps shape the kind of tire character you are comparing, but the first priority remains proper fitment for the truck's exact wheel and rear-wheel configuration. Once the correct size is confirmed, it makes sense to review the series details together with load rating, rim-width specification, and sidewall style.
Restoration & Appearance
Which tire should I choose for a period-style 2015 RAM Trucks 3500 Laramie Longhorn?
A period-style choice for a 2015 RAM Trucks 3500 Laramie Longhorn starts with keeping the truck in its correct original-size format for the actual wheel package and rear-wheel configuration. That means staying with 275/70R18 or 285/60R20 on SRW trucks, or 235/80R17 on DRW trucks, rather than treating the sizes as interchangeable.
Appearance then comes down to the tire's tread and sidewall presentation within the proper fitment. Owners aiming for a more authentic showroom-era look should compare the current tire against original vehicle literature, window-sticker documentation, or marque-specific references before choosing a replacement solely for style.
Does correct tire fitment matter for a 2015 RAM Trucks 3500 Laramie Longhorn restoration?
Correct tire fitment matters because the 2015 RAM Trucks 3500 Laramie Longhorn used more than one size, and each size corresponds to a specific wheel and truck configuration. A restoration-minded truck can look noticeably off if a DRW setup is given an SRW fitment, or if the wheel diameter does not match the intended tire.
Proper fitment also affects stance, wheelwell appearance, and how accurately the truck reflects its equipment level. Even on a newer collector truck, confirming the exact sub-model, wheel size, and sidewall style is a better starting point than choosing by appearance alone.
Fitment, Maintenance & Road Use
Can modifications affect tire fitment on a 2015 RAM Trucks 3500 Laramie Longhorn?
Yes. Modifications can affect tire fitment on a 2015 RAM Trucks 3500 Laramie Longhorn even when the tire size looks close on paper. Aftermarket wheels, offset changes, suspension lifts or lowering, and conversions between original-style setups can all change clearance, wheel compatibility, and how the tire sits under the truck.
A modified truck should be checked at the wheel, not just by trim name. Steering clearance, rear fitment, and the relationship between tire width and wheel width all deserve attention, especially on trucks used for towing or carrying weight where fitment mistakes can become more noticeable in real use.
What should I inspect before driving a 2015 RAM Trucks 3500 Laramie Longhorn on new tires?
Before driving on new tires, inspect wheel condition, confirm the tire size matches the truck's actual configuration, and make sure inflation is set appropriately for the tire and the truck's use. It also helps to check for obvious issues such as uneven seating, visible damage, or contact points around the fenders and suspension.
A heavy-duty truck deserves a careful first look after installation. Recheck air pressure after initial driving, watch for any rubbing at full steering lock, and pay close attention if the truck is used for towing or hauling. That early inspection can catch setup problems before they become harder on the tires.
How often should tires on a 2015 RAM Trucks 3500 Laramie Longhorn be inspected?
Tires on a 2015 RAM Trucks 3500 Laramie Longhorn should be inspected regularly, not only when tread looks worn. A practical routine includes checking pressure often, looking over the tread and sidewalls for cuts, cracking, bulges, or uneven wear, and paying attention to any unexplained air loss.
Inspection becomes even more important on a truck that sits for stretches and then returns to hauling or highway duty. Frequent visual checks, pressure maintenance, and a closer look before longer trips help catch age-related or use-related issues early, whether the truck runs an SRW or DRW tire setup.
