2018 RAM Vans Tire Fitment Guide

2018 RAM Vans ProMaster 1500, ProMaster 2500, and ProMaster 3500 models all use the same tire size: 225/75R16. That size fits a 16-inch wheel, and the available product for this application is built for a 6.0- to 7.0-inch rim width range. Because every model core in this year and make uses the same size, there is no split between lighter and heavier ProMaster models at the basic tire-size level.

That shared sizing makes year-and-make research simpler, but it does not remove the need to confirm the actual wheels on the van. Commercial vans are often refitted, converted, or repurposed over time, so it is smart to check the sidewall of the current tire and verify the wheel diameter before replacing anything. Once 225/75R16 is confirmed, the next question becomes whether the tire's tread style, load rating, and service character suit your specific ProMaster's job.

On a 2018 RAM Vans tire, 225/75R16 is a metric radial size code. The 225 is the nominal section width in millimeters, 75 is the aspect ratio, R indicates radial construction, and 16 is the wheel diameter in inches. In the available ProMaster fitment, this size also carries a 115S service description, which corresponds to a 112 mph speed rating ceiling for the tire itself.

Understanding the code helps you avoid mixing up wheel diameter with tire width or assuming that any 16-inch tire is interchangeable. The width, profile, and construction all matter, especially on a van that may carry tools, cargo, or camper equipment. If your current tire shows a different code, treat that as a cue to inspect whether the van still has its original wheel and tire setup before moving ahead with a replacement.

Yes. The 2018 RAM Vans ProMaster 1500, ProMaster 2500, and ProMaster 3500 all use 225/75R16 tires. That means the basic fitment size remains consistent across the model range even though the vans serve different roles, from lighter commercial use to heavier-capacity work. Wheel diameter is also consistent at 16 inches for this tire application.

What changes from model to model is less about the size code and more about how the van is used. A lightly loaded van, a contractor van, and a camper conversion can all wear the same nominal size while asking different things from the tire in terms of load support and tread character. Identifying the model is still worthwhile, but in this case it mainly helps you confirm the intended duty cycle rather than sort between multiple factory tire sizes.

The available 225/75R16 tire for 2018 RAM Vans uses an RWL, or raised white letter, sidewall style. That gives the tire a more aggressive, truck-oriented appearance than a plain blackwall. Since the ProMaster is a modern commercial van rather than a period-restoration vehicle, sidewall choice here is more about visual preference and service character than about factory-era authenticity standards.

An RWL sidewall can suit a van that sees mixed-use duty, recreation, or a more rugged visual theme, but it may look less understated on a fleet-style work van than a blackwall tire would. Appearance matters more than many buyers expect on a high-sided vehicle, especially if it is being built into a camper or promotional van. If your priority is a clean commercial look, compare the sidewall style to the rest of the van before making your final selection.

BFGoodrich makes the currently available tire for the 2018 RAM Vans fitment covered here, and that tire is the All-Terrain T/A KO2 in 225/75R16. BFGoodrich has long been associated with truck, SUV, and utility-focused tire designs, so its presence in this ProMaster size points toward a tire with a more rugged service identity rather than a strictly highway-van presentation.

Brand matters because it usually signals the tire's intended character as much as its dimensions. A ProMaster used for delivery routes, jobsite access, or conversion travel may benefit from a utility-oriented product, while a van aimed at quiet urban use may call for a different style if available in the future. Once you have confirmed the size, compare the brand's tread theme and load capability to the way your particular van is actually driven.

The BFGoodrich All-Terrain T/A KO2 available in 225/75R16 for 2018 RAM Vans is an all-terrain radial with a raised white letter sidewall, a 115S service description, a 2,680-pound maximum load rating at 80 psi, and a 42-pound tire weight. Those details place it squarely in the truck and utility category rather than the smoother, more plain-sided profile buyers often associate with a highway-focused cargo-van tire.

That does not automatically make it the right answer for every ProMaster. A van used on rough access roads, mixed surfaces, or outdoor trade work may benefit from that more rugged character, while a primarily urban or highway van may call for a different tread style if one becomes available in the same size. The best approach is to match the tire's mission to your van's mission instead of choosing on size code alone.

The available 225/75R16 tire for 2018 RAM Vans is intended for a 6.0- to 7.0-inch rim width range and mounts on a 16-inch wheel. That width range matters because it helps the tire maintain its intended shape, tread contact, and sidewall profile. Even when the size code on the sidewall matches, a wheel that falls outside the approved width range can change how the tire sits and behaves.

Checking wheel width is especially important on vans that may have had wheel changes during fleet service, camper conversion, or custom use. A tape measure alone is not always enough, so verify the actual wheel specification if there is any doubt. Confirming rim width before purchase is one of the simplest ways to avoid clearance issues, odd tread wear, or a tire that technically mounts but is not operating in its intended range.

The available 225/75R16 fitment for 2018 RAM Vans does not indicate a tube-type marking, and the product is presented as a modern radial truck tire. That strongly points toward a tubeless application on the correct 16-inch wheel. On a late-model commercial van such as the ProMaster, tubeless radial construction is the normal expectation unless a very unusual wheel setup has been substituted.

Even so, the wheel itself still matters. If a van has had aftermarket steel wheels, specialty conversion hardware, or older-style service replacements installed, inspect the wheel condition and valve stem arrangement before assuming anything. A clean sealing surface and sound valve stem are just as important as the tire itself on a tubeless setup, particularly on a van that carries cargo weight or spends long hours on the road.

A 2018 RAM Vans should be stored out of direct sunlight, away from ozone sources such as electric motors and welders, and on a clean, dry surface. Inflate the tires to the appropriate operating pressure for storage conditions, keep the van from sitting in standing moisture, and move it periodically if possible. Radial tires generally tolerate static storage better than old-style bias-ply tires, but they can still develop flat spotting, weathering, and sidewall aging if neglected.

Storage habits matter even more on a ProMaster than on a lighter collector car because vans often sit loaded, partially loaded, or converted with permanent interior weight. If the van will be parked for an extended period, unload unnecessary cargo and consider occasional rolling or weight relief measures. Good storage practice preserves ride quality, helps prevent casing stress, and gives you a better chance of returning the van to service without surprise tire issues.

Tires on a 2018 RAM Vans should be judged by age and condition as much as by tread depth. A prudent collector and utility-vehicle rule is to begin close inspection around the five- to seven-year mark and to treat about ten years as the point where replacement deserves serious consideration regardless of mileage. The DOT date code on the sidewall tells you when the tire was made, which is often more useful than the odometer on low-use or seasonal vans.

Commercial vans complicate the picture because some wear out tires through duty while others age out tires through inactivity. A camper conversion or backup fleet van may still have ample tread long after the rubber has hardened and the casing has aged. If the van has been parked for long stretches, inspect for cracking, vibration, and pressure loss rather than assuming low miles mean long remaining life.

Tires on a 2018 RAM Vans deserve a quick inspection before every drive and a more thorough inspection before any extended trip. Check inflation pressure, visible cuts, bulges, uneven wear, embedded debris, and sidewall cracking, then look at the valve stems and the spare as well. On a working van, curb contact and long parked periods can affect the tire just as much as highway mileage does.

That inspection routine becomes especially valuable on a ProMaster carrying tools, equipment, or conversion weight because a problem tire is working harder than it would on a lighter passenger vehicle. A few minutes with a gauge and flashlight can catch slow leaks, shoulder wear, or impact damage before they turn into a roadside issue. Regular checks also help you spot whether the van needs an alignment or pressure adjustment instead of another replacement tire.

The 225/75R16 tire available for 2018 RAM Vans carries an S speed rating, which corresponds to a 112 mph ceiling for the tire itself. That is well above normal U.S. highway speeds and appropriate for a modern commercial van application when the tire is in good condition, properly inflated, and used within its load limits. In real use, the van's cargo weight, suspension condition, braking performance, and overall maintenance matter at least as much as the tire's nominal speed rating.

Safety on the highway comes from the whole package rather than a speed letter alone. A lightly used ProMaster with aging tires can be less confidence-inspiring than a regularly maintained one with the same size and rating. Before a longer highway trip, verify tire age, pressure, tread condition, and how the van is loaded, especially if it has been converted for camping or carries permanent equipment that changes weight distribution.

The available 225/75R16 tire for 2018 RAM Vans carries a maximum load capacity of 2,680 pounds at 80 psi. That figure is the tire's rated maximum for that product, not automatically the day-to-day pressure every ProMaster should run in every loading condition. Factory operating pressure should be taken from the van's door placard or owner's information, while the tire manufacturer's rating defines the upper load-and-pressure capability of the tire itself.

Pressure is one area where guessing causes real problems on a van. Too little pressure builds heat and wears the shoulders, while too much for the actual load can harden the ride and reduce the contact patch. Use the vehicle's recommended pressure as your baseline, then make sure the tire you choose has the load reserve your van needs for its real-world duty rather than simply inflating to the sidewall maximum.

Before taking a 2018 RAM Vans on a longer drive, inspect each tire for cracking, cuts, punctures, bulges, irregular wear, and correct cold inflation pressure. Check the spare, valve stems, and tread depth as part of the same walkaround, and make sure the tires are appropriate for the load the van will actually carry. On a ProMaster, that includes thinking about cargo, shelving, tools, or camper equipment that may keep the vehicle heavier than it appears from the outside.

A long-trip check should also include the broader mechanical basics expected of a modern older van: brakes, lights, fluids, and suspension condition. Tires are only one part of road readiness, but they are the part most likely to telegraph trouble through visible damage or pressure loss before departure. Catching those signs early is the best way to avoid heat buildup, unstable handling, or a roadside stop once the van is fully loaded and underway.