2015 RAM Trucks Tire Fitment Guide

2015 RAM Trucks vehicles use eight tire sizes across the full lineup: 275/60R20, 265/70R17, 285/70R17, 285/45R22, 275/70R18, 285/60R20, 245/70R17, and 235/80R17. The 1500 uses 275/60R20, 265/70R17, 285/70R17, and 285/45R22. The 2500 uses 275/70R18, 285/60R20, 285/70R17, and 245/70R17. Most 3500 models use 275/70R18, 285/60R20, and 235/80R17, while 3500 Laramie Limited uses 285/60R20 and 235/80R17, and 3500 Tradesman uses 275/70R18 and 235/80R17.

Rim diameter is the key dividing line. These sizes mount on 17-, 18-, 20-, or 22-inch wheels, and the product range here covers rim widths from 6.0 to 9.5 inches depending on size: 235/80R17 fits 6.0-7.5-inch rims, 245/70R17 fits 6.5-8.0, 265/70R17 fits 7.0-9.0, 285/70R17 fits 7.5-9.5, and 275/70R18 fits 7.0-9.0. Before choosing a tire, confirm the exact model and the wheel diameter already on the truck, because year and make alone do not narrow the fitment far enough.

On a 2015 RAM Trucks tire, 265/70R17 is a metric radial size code. The 265 is the nominal section width in millimeters, 70 is the aspect ratio, the R means radial construction, and 17 is the wheel diameter in inches. On this RAM application, that size belongs to the 1500. BFGoodrich offers it in two load versions, both with S speed ratings, and both fit 17-inch wheels.

That code matters because it tells you far more than width alone. A 265/70R17 cannot replace a 20-inch or 22-inch fitment without changing wheels, and it also differs in section width and overall profile from the other 17-inch RAM sizes. If your 2015 RAM Trucks 1500 already has 17-inch wheels, this size keeps you in the correct diameter family while preserving the original tire-code format the truck was designed around.

No, 2015 RAM Trucks models do not all use the same tire size. The 1500 has its own mix of 17-, 20-, and 22-inch options, the 2500 mixes 17-, 18-, and 20-inch sizes, and the 3500 range centers on 17-, 18-, and 20-inch heavy-duty fitments. Only a few sizes cross between model families, such as 285/70R17 between the 1500 and 2500, 275/70R18 between the 2500 and several 3500 trims, 285/60R20 between the 2500 and many 3500 trims, and 235/80R17 across much of the 3500 line.

That variation means the model badge matters just as much as the year. A buyer who starts with only “2015 RAM Trucks” can easily end up comparing a 22-inch half-ton fitment to a 17-inch one-ton fitment that serves a completely different wheel and duty class. Check the exact model name on the truck, then confirm the wheel diameter and the tire size already mounted before comparing brands, sidewall styles, or load ratings.

2015 RAM Trucks tires in the current product range use two sidewall styles: RWL and RBL. The 265/70R17, 285/70R17, 275/70R18, and 245/70R17 BFGoodrich options use raised white letters, while the 235/80R17 BFGoodrich option uses a raised black letter sidewall. Those sidewall treatments change the truck's appearance even when the size and construction stay within the proper fitment family.

Sidewall style is mostly an appearance choice on a 2015 RAM Trucks application, but it still matters to buyers who want a certain look. RWL tends to suit trucks with a more off-road or period light-truck visual character, while RBL reads more understated and commercial. Once the correct size is confirmed, sidewall style becomes a useful way to match the tire to the truck's trim level, wheel design, and intended presentation without changing the underlying fitment.

BFGoodrich covers the current product range for 2015 RAM Trucks in the sizes available here. The 265/70R17, 285/70R17, 275/70R18, 245/70R17, and 235/80R17 sizes all appear in BFGoodrich All-Terrain T/A KO2 form. Every one of those products is a radial, and they span both lighter-duty 1500 fitments and heavier-duty 2500 and 3500 applications.

That brand consistency simplifies the buying process because the overall tread family and construction approach stay familiar as you move between sizes. The real differences are the size itself, the wheel diameter it fits, the sidewall style, and the load or speed specification attached to that exact version. If you are comparing options for a 2015 RAM Trucks model, start by matching the size to the truck first and the brand question becomes much easier.

The two 285/70R17 choices for 2015 RAM Trucks share the same basic size, radial construction, BFGoodrich branding, RWL sidewall style, and 7.5-9.5-inch rim width range, but they differ in load and speed specification. One version is 116Q with a 2,755-pound maximum load at 50 psi and a 99 mph speed ceiling. The other is 121/118R with a 3,195-pound maximum load at 80 psi and a 106 mph speed ceiling. Weight also changes, at 50.3 pounds versus 58.2 pounds.

Those differences matter most to buyers using a 2015 RAM Trucks 1500 or 2500 that already runs this size. The lighter Q-rated version aligns with a lower-pressure, lower-load setup, while the R-rated version carries more load and uses a higher maximum pressure. The right choice depends on how the truck is configured and used, so compare the existing tire's service description and the wheel's pressure capability before moving from one version to the other.

Rim width requirements on 2015 RAM Trucks depend on the tire size. The current product range shows 235/80R17 fitting 6.0-7.5-inch rims, 245/70R17 fitting 6.5-8.0-inch rims, 265/70R17 fitting 7.0-9.0-inch rims, 285/70R17 fitting 7.5-9.5-inch rims, and 275/70R18 fitting 7.0-9.0-inch rims. Those figures are size-specific and should be treated independently rather than transferred from one fitment to another.

That means even when two sizes share the same wheel diameter, they may not share the same ideal rim width range. A 17-inch wheel that works well with 235/80R17 may not be the right width for 285/70R17, even though both mount on 17-inch rims. Check the wheel width stamped on the wheel or confirm it through the truck's build information before making a size change within the same diameter family.

2015 RAM Trucks tires in this product range are radial light-truck tires with modern service descriptions, and none of the available sizes here are marked as tube-type. The 265/70R17, 285/70R17, 275/70R18, 245/70R17, and 235/80R17 products all appear in contemporary radial form rather than vintage tube-type construction. That points buyers toward standard modern wheel-and-tire practice for these applications.

The practical step is to verify the wheel condition and valve stem setup rather than assuming every used wheel is ready for a fresh tire. If a 2015 RAM Trucks wheel has corrosion, bead-seat damage, or an aging valve stem, address that during installation. The tire itself does not call for a tube here, but the wheel still needs to be suitable for modern tubeless radial service and in sound condition before the truck goes back on the road.

Original 2015 RAM Trucks wheels cannot be treated as universal across all eight tire sizes because the lineup spans 17-, 18-, 20-, and 22-inch rim diameters. A 17-inch wheel can only accept the 17-inch sizes, an 18-inch wheel only the 275/70R18, a 20-inch wheel only the 20-inch sizes, and a 22-inch wheel only the 285/45R22. Several models also offered multiple wheel packages within the same model family.

The practical takeaway is simple: match tire diameter to wheel diameter first, then confirm the wheel width is appropriate for the exact size being considered. That matters especially on 2015 RAM Trucks 1500 and 2500 models, where more than one wheel diameter may have been available from the factory. If the truck has changed hands or wears aftermarket wheels, check the actual wheel stamp rather than relying on model assumptions alone.

A 2015 RAM Trucks should be stored on a clean, dry surface away from direct sunlight, electric motors, battery chargers, welders, and other ozone-producing equipment. Keep the tires properly inflated, move the truck periodically if possible, and avoid letting one footprint sit in the same place for months at a time. Because these are radial truck tires, they generally tolerate storage better than old-style bias-ply designs, but heat, UV exposure, and static loading still age rubber over time.

For a truck that sits through part of the year, a brief monthly roll and a pressure check go a long way. If the 2015 RAM Trucks vehicle is stored for an extended period with weight on the tires, consider reducing strain with tire cradles or, where appropriate, support stands that follow safe lifting practice. Good storage preserves ride quality, helps prevent irregular flat spotting, and extends the useful service life of an expensive heavy-duty tire set.

Tires on a 2015 RAM Trucks should be judged by age, condition, and service history as much as by tread depth. A good collector and utility-truck rule is to begin close inspection around five to seven years of age and to treat around ten years as a serious replacement point even if tread remains. The DOT date code on the sidewall gives the week and year of manufacture, which is the best starting point for that evaluation.

Mileage alone can be misleading on a truck that tows occasionally, sits for long periods, or sees uneven seasonal use. Heat cycles, underinflation, heavy loading, and long idle periods can age a 2015 RAM Trucks tire before the tread looks worn out. If the rubber is approaching that age window, have the tires inspected carefully and weigh replacement based on time, cracking, vibration, and service demands rather than waiting for visible tread wear alone.

Tires on a 2015 RAM Trucks should be inspected before every drive and again before any longer highway trip or towing outing. Look for cuts, sidewall cracking, bulges, irregular wear, punctures, and pressure loss, and make sure the tread is wearing evenly across the tire. On heavier 2500 and 3500 applications, inspection is especially important because load demand can magnify the effects of low pressure or unnoticed damage.

A quick walk-around catches many problems before they become roadside failures. Use a gauge rather than a visual guess, and include the spare in the routine because a neglected spare is common on trucks that see intermittent use. If the 2015 RAM Trucks vehicle has recently hauled, towed, or sat for an extended period, give the tires extra attention before heading out again, since those use patterns often reveal slow leaks, flat spotting, or age-related cracking.

2015 RAM Trucks tires are suitable for highway driving when the correct size, load specification, and condition are matched to the truck. The available speed ratings here include Q at 99 mph, R at 106 mph, and S at 112 mph depending on size and version. Those ceilings are well above normal U.S. highway speeds, but a safe highway setup depends just as much on inflation, load carried, alignment, and the overall mechanical condition of the truck.

On a 2015 RAM Trucks 2500 or 3500, towing weight, suspension wear, and brake condition can become more limiting than the tire's speed letter in ordinary road use. That is why it is smart to match the service description to how the truck is actually used instead of focusing only on width or sidewall appearance. A fresh, properly inflated tire with the right load capability is the foundation; the truck's broader condition finishes the safety equation.

Inflation pressure on 2015 RAM Trucks tires depends on the exact size and tire version. Current maximum load and pressure pairings include 265/70R17 at 2,470 pounds at 50 psi or 3,195 pounds at 80 psi, 285/70R17 at 2,755 pounds at 50 psi or 3,195 pounds at 80 psi, 275/70R18 at 3,640 pounds at 80 psi, 245/70R17 at 3,000 pounds at 80 psi, and 235/80R17 at 3,085 pounds at 80 psi. Those numbers are tire ratings, not blanket running pressures for every truck.

Use the truck's factory placard or owner's manual as the baseline for everyday inflation, then confirm that the selected tire's own rated limits are appropriate for the application. A 2015 RAM Trucks 1500 used empty on the road may want a different pressure than a 2500 or 3500 carrying heavy load, even when wheel diameter is similar. Never borrow a pressure recommendation from one size and apply it to another without confirming the correct service specification first.

Before taking a 2015 RAM Trucks on a longer drive, inspect every tire for cracking, punctures, uneven wear, bulges, and proper cold inflation pressure. Confirm that the spare is serviceable, the valve stems are in good condition, and the tread is wearing evenly across the axle. If the truck will tow or carry a meaningful load, make sure the tire's load capability matches the job and that the tires are not already showing signs of heat stress or shoulder wear.

Tires are only one part of the pre-trip routine on a truck of this type. A 2015 RAM Trucks 2500 or 3500 should also have brakes, steering, suspension, and wheel fasteners checked before a demanding trip, especially if the truck has been sitting or was recently used hard. Taking a few extra minutes before departure helps catch small problems early and makes the tire choice you settled on work the way it was intended to.