What size wheels come on a RAM 2500?

The RAM 2500 uses wheel sizes that range from 17 inches to 20 inches in diameter, depending on trim and factory options. The exact size for any given truck is listed on the window sticker or build sheet.

The question of wheel size is important because it varies across the RAM 2500 lineup and across model years. RAM offers multiple wheel-and-tire configurations to match ride quality, load capability, and aesthetics, with the size determined by trim level, cab/bed configuration, and optional packages. In practice, you’ll encounter three common diameter categories, and the exact choice changes with year and market.

Common wheel sizes offered on RAM 2500

Below is a general guide to the wheel diameters you can encounter on recent RAM 2500 models. The precise size for a particular vehicle should be confirmed via the factory window sticker or by a RAM dealer.

• 17-inch wheels — frequently found on base trims and entry configurations. These are typically paired with smaller, more utilitarian tires and are common on Tradesman models.


• 18-inch wheels — a common option for mid-range trims and several packages, offering a balance of ride comfort and capability.


• 20-inch wheels — widely featured on higher-trim models and many popular packages, providing a more aggressive look and additional handling characteristics.

Never assume a single wheel size applies to all RAM 2500s; the exact diameter depends on year, trim, and chosen options. Always verify with the official build documentation for the specific truck in question.

Key factors that influence wheel size

Wheel size on the RAM 2500 is driven by several factors, including the trim level, cab and bed configuration, drivetrain (2WD vs. 4WD), and optional equipment such as off-road or luxury packages. Some special editions may also use unique wheel configurations not found on other trims.

Understanding these factors helps explain why two RAM 2500 trucks from the same model year can have different wheel sizes. When shopping or inspecting a used vehicle, checking the exact specification is essential.

How to verify the wheel size on your RAM 2500

To confirm the wheel size for any RAM 2500 you own or are considering, use the following steps. These methods apply to most model years and configurations.

• Check the driver’s door jamb sticker, which lists wheel and tire specifications for the OEM setup.


• Inspect the wheel itself for stamped size markings (for example, a marking such as 18x8.0 or 20x9.0 on the wheel face or lip).


• Consult the owner’s manual or the original window sticker (Monroney label) for the exact wheel diameter and tire size as equipped at factory delivery.


• If you’re evaluating a used RAM 2500, ask the seller for the VIN-based build sheet or contact a RAM dealer to pull the exact factory configuration.

Verifying wheel size is especially important if you’re planning tire replacements, wheel upgrades, or aftermarket parts to ensure compatibility with brakes, clearance, and load ratings.

Summary

In summary, RAM 2500 wheel diameters span 17, 18, and 20 inches in recent years, with the exact size determined by trim, options, and year. For the precise size, check the vehicle’s window sticker, door jamb label, wheel markings, or the factory build sheet. This ensures any replacements or upgrades match the truck’s intended specifications and performance characteristics.

What size are the stock rims on a RAM 2500?

Stock RAM 2500 wheel sizes vary by trim and model year, but commonly include 17-inch, 18-inch, and 20-inch diameters with a 8x165.1mm bolt pattern. Widths can range from 7 to 9 inches, depending on the specific model and trim level. Common stock tire sizes include LT245/70R17, LT285/70R17, LT275/70R18, and LT285/60R20.
 
Key stock wheel specifications

• Diameter: 17 to 20 inches
• Bolt Pattern: 8x165.1mm (also called 8x6.5)
• Width: 7 to 9 inches, depending on the model
• Offset: +12 to +58 mm 

Examples of stock sizes by trim and year

• 17-inch: LT245/70R17 and LT285/70R17 tires were standard on some models. 
• 18-inch: LT275/70R18 tires were a common option. 
• 20-inch: LT285/60R20 tires were used on certain trims. 

What year RAM 2500 6.7 to avoid?

2014 RAM 2500
This is one of the worst RAM 2500 years to avoid due to widespread engine woes. There is a concerning fault with a bolt in the intake plenum of the 6.7L Cummins diesel engines. If the #6 cylinder ingests the bolt, it can loosen and break off, leading to catastrophic engine failure.

Are 8x6.5 and 8x165 the same?

Yes, "8x165" and "8x6.5" refer to the same bolt pattern, as 165.1 millimeters is equal to 6.5 inches. The notation 8x165 uses millimeters, while 8x6.5 uses inches, but they both describe a wheel with eight lug holes spaced in a circle that measures 165.1 mm or 6.5 inches across. 

• 8x165: This notation uses millimeters to measure the bolt circle diameter. 
• 8x6.5: This notation uses inches to measure the bolt circle diameter. 
• Conversion: 165.1 mm≈6.5 inches165.1 mm is approximately equal to 6.5 inches165.1 mm≈6.5 inches. 
• Compatibility: Wheels designed for an 8x165 bolt pattern will fit on a vehicle with an 8x6.5 bolt pattern, and vice versa. 

What size tires can I put on my RAM 2500?

The tire size for a Ram 2500 varies by model year and trim, with common sizes being 275/70R18 or 285/60R20 for many trims, and 285/70R17 for the Power Wagon. Without a lift, you can typically fit a slightly larger tire like a 295/65R20 on 20-inch wheels or a 295/70R18 on 18-inch wheels, but for much larger tires like 35 inches or more, you will likely need a lift or leveling kit to prevent rubbing.
 
Common stock sizes by trim (model year dependent)

• Tradesman: 245/70R17 or 275/70R18
• Big Horn: 275/70R18 or 285/60R20
• Laramie: 275/70R18 or 285/60R20
• Limited: 285/60R20 or 275/70R18
• Power Wagon: 285/70R17 

Common upsize options without a lift 

• On 18-inch wheels: 295/70R18 (approx. 33.5" tall) 
• On 20-inch wheels: 295/60R20 or 295/65R20 (approx. 34" tall) 
• Note: Aftermarket wheels with a different offset may cause rubbing even with these sizes, so check the wheel's specifications. The 295/70R18 is a good option as it fits stock wheels without modification, and is generally load-rated high enough for towing. 

Larger sizes (typically require a lift)

• 35-inch tires: Can fit on a stock suspension with careful selection of tire and wheel offset, but a lift is recommended to avoid rubbing issues. 
• 37-inch tires: Will require a lift or leveling kit to fit without rubbing.