Ram 2500 Tire Size Chart by Year and Trim 2011 to 2026

Ram 2500 factory tire sizes range from LT245/70R17 on base Tradesman trucks up to LT285/60R20 on Laramie and Limited trims, and the size that matters is tied to your trim level, not just your model year. Two generations cover the modern Ram 2500: the 2011-2018 DS/DJ trucks and the 2019-2025 DS/DJ Facelift trucks.

Both use the same 8-lug wheel pattern, but the tire lineup shifted between them. This chart breaks down factory sizes by trim for each generation, explains what the size code on your sidewall actually means, and covers correct tire pressure and how far you can size up before you need a lift.

Ram 2500 Bolt Pattern and Wheel Specs Every Owner Should Know

Every Ram 2500 from 2011 through 2025 uses an 8×165.1mm bolt pattern, commonly listed as 8×6.5 inches. This has held steady across both generations covered in this guide, and it carries a 121.3mm hub bore.

This is not the same pattern as the Ram 1500, which uses a 5-lug or 6-lug setup depending on year. Ram 1500 wheels will not bolt onto a 2500, and mixing them up is a common mistake when shopping aftermarket wheels.

Because the bolt pattern is consistent across nearly 15 model years, most aftermarket wheels marketed for one Ram 2500 year will physically bolt onto another. Fitment still depends on offset and backspacing, so check those numbers before ordering, and torque new wheels to the correct factory spec once they are mounted.

Factory Tire Sizes for 2011 to 2018 Ram 2500 by Trim

The first-generation DS/DJ Ram 2500 ran mostly 17-inch wheels through the early years of this range, then added 18-inch and 20-inch options on upper trims starting around 2016.

The Power Wagon has carried its own dedicated size since its 2014 reintroduction, built around its factory 2-inch lift and locking differentials. If your Ram 2500 falls in this generation, confirm your exact size against the tire and loading placard on your driver door before ordering. Trim naming and available packages shifted more than once during this seven-year run.

Factory Tire Sizes for 2019 to 2025 Ram 2500 by Trim

The 2019 redesign narrowed the lineup to four core OEM sizes across the whole trim range, which makes this generation more straightforward to shop for.

This four-size structure has held consistent through the 2025 model year with no major running changes reported. If you drive a 2500 within this range, matching your trim to the table above should get you the correct factory size in nearly every case.

What Ram 2500 Tire Size Codes Actually Mean

A tire size like LT275/70R18E looks cryptic until you know what each part represents.

LT stands for Light Truck, which tells you the tire is built for higher load capacities than a standard passenger tire. Ram 2500s always ship with LT-rated rubber.

275 is the tire’s width in millimeters, measured sidewall to sidewall.

70 is the aspect ratio, meaning the sidewall height equals 70 percent of the tire’s width.

R18 means radial construction on an 18-inch wheel.

E is the load range. Most Ram 2500 factory tires carry a Load Range E rating, built with stiffer sidewalls to handle towing and heavy bed loads. This connects directly to your truck’s payload and towing capacity, since a lower load range tire cannot legally or safely carry what the truck is rated for.

Your exact factory size is stamped on the tire sidewall and printed on the tire and loading information placard inside the driver door jamb. The placard is the source that matches your specific configuration, since two trucks with the same trim can leave the factory with different tires depending on options.

Correct Tire Pressure for Ram 2500 by Trim and Load

The most common point of confusion on Ram 2500 tire pressure is mixing up two different numbers. The pressure printed on the tire sidewall, often 80 psi on Load Range E tires, is the tire’s maximum cold pressure rating, not the number you should run daily.

Under Federal Motor Vehicle Safety Standard 110, the number that matters for everyday driving is the cold inflation pressure on your door jamb placard, which the manufacturer sets for your specific tire size and vehicle weight.

Most Ram 2500 door placards call for 60 psi cold across all four tires as the baseline setting for a loaded configuration. Owners on RamForumZ and RamForum report commonly running lower pressure, often in the 45 to 55 psi range, when driving unloaded,

and increasing toward the placard number or the tire’s max rating when towing or hauling near capacity. Treat these forum figures as real-world practice rather than a factory spec, and always default to your own door placard first.

If you change your wheel or tire size from factory, the placard pressure may no longer reflect your setup accurately, since it was calculated for the original equipment size.

How Big of a Tire Can You Fit on a Stock Ram 2500

Sizing up from your factory tire is one of the most common upgrades on a Ram 2500, and how far you can go depends entirely on your ride height.

Stock Height Ram 2500

At factory ride height, most 4×4 Ram 2500s from 2014 onward clear a 285 to 295mm width tire with no rubbing, staying close to the factory diameter. Some owners report clean fitment up to 35×12.50 on factory wheels with zero modifications, though results vary by year and axle type, so this is closer to a ceiling than a guarantee.

Leveling Kit or 2 to 3 Inch Lift

A 35×12.50 tire is the most common upsize target on a Ram 2500, and it typically clears cleanly with a leveling kit or a 2 to 3 inch lift. Wheel offset in the plus 18mm to plus 25mm range gives the best balance of clearance without excessive scrub radius change.

37 Inch Tires and Larger

Moving to 37s changes the math entirely. This size generally requires a taller lift, aftermarket control arms, and fender trimming to avoid rubbing at full steering lock. Budget for a speedometer recalibration at this size as well, since your factory gearing and speedo will read incorrect actual road speed once tire diameter changes significantly.

Whatever size you land on, stick with a Load Range E or higher when towing regularly. All-terrain tires built specifically for the Ram 2500 are worth a look if you want a size upgrade that still holds up under a loaded bed.

Ram 2500 Spare Tire Size and TPMS Notes

The Ram 2500 ships with a full-size spare that matches your on-truck tire size, not a compact donut, across both the 2011-2018 and 2019-2025 generations. This is worth knowing if you are buying a replacement spare separately, since a mismatched spare size will throw off your TPMS readings and your speedometer if left mounted for any length of time.

If you do change your tire size from factory, whether through a straight swap or a lift and upsize, your TPMS system will need to be reset to recognize the new sensors correctly. See our Ram 2500 TPMS reset button location guide for the exact steps.

Getting the Right Tire Size for Your Ram 2500

Trim level drives Ram 2500 tire size more than model year alone, especially once you cross into the 2016-2018 range where wheel options expanded. Before ordering replacements, check your driver door placard against the tables above to confirm your exact factory size, since options and packages can shift what shipped on your specific truck.

If you are ready to upgrade rather than replace like for like, start with your ride height to figure out your real ceiling before falling in love with a specific tire size. From there, matching the right load range to how you actually use your truck will do more for ride quality and towing confidence than chasing the biggest tire that technically fits.

Frequently Asked Questions

What size tires come on a Ram 2500?

Factory sizes range from LT245/70R17 on base Tradesman trims up to LT285/60R20 on Laramie and Limited trims. The exact size depends on your specific trim and model year, so check your door placard to confirm.

Do all Ram 2500 trims have the same tire size?

No. Tire size varies by trim within the same model year. Base trims like Tradesman run smaller 17-inch tires, while higher trims like Laramie and Limited often run larger 18 or 20-inch setups.

What is the max tire size for a Ram 2500 without a lift?

Most stock-height 4×4 Ram 2500s clear tires in the 285 to 295mm width range, with some owners fitting 35×12.50 tires on factory wheels without rubbing. Results vary by year and configuration.

What PSI should Ram 2500 tires be?

Most Ram 2500 door placards specify 60 psi cold as the baseline setting. This is different from the tire’s sidewall maximum, which can read up to 80 psi on Load Range E tires and is not the recommended daily pressure.

Is the Ram 2500 bolt pattern the same as the Ram 1500?

No. The Ram 2500 uses an 8×165.1mm bolt pattern across all years covered here, while the Ram 1500 uses a different 5-lug or 6-lug pattern. Wheels are not interchangeable between the two.