How big of a tire can you fit on a stock Ram 1500?
Most stock Ram 1500s can run roughly 33-inch tires without suspension lifts, depending on wheel size and trim. To go bigger (34 inches or more) typically requires a leveling kit or a suspension lift, plus possible trimming and recalibration.
Understanding stock tire sizes on the Ram 1500
Ram 1500 tire fitment varies by model year, trim, and wheel package. Here is a snapshot of common stock diameters by wheel size.
- 18-inch wheels: commonly equipped with 275/65R18, about 33.0 inches in overall diameter.
- 20-inch wheels: commonly equipped with 275/60R20, about 32.7 inches in overall diameter.
In practice, many Ram 1500s sit in the 32–33 inch diameter range from the factory, with exact numbers depending on the specific tire and wheel package.
How far you can go without a full lift
If you want a more aggressive look without a full suspension upgrade, you can often fit 33-inch tires with a leveling kit and careful wheel selection. This section explains the typical approach.
- Install a leveling kit to create extra clearance for larger tires (roughly 1–2 inches in front, enabling the use of 33-inch tires on many builds).
- Choose wheels with appropriate width and offset to maintain adequate clearance around the front lower control arms, wheel wells, and fender liners.
- Common non-lift tire options in this category include 33x10.5 or 33x12.5 tires on 18x9 or 20x9 wheels, though fitment varies by year and trim.
With these adjustments, many Ram 1500 owners report successful mounting of 33-inch tires; however rubbing at full lock or during suspension compression can still occur, and some trims or air-suspension variants may behave differently.
When a lift or trimming is necessary
To run anything larger than about 33 inches reliably, most Ram 1500 owners opt for more substantial modifications, such as a suspension lift and, in some cases, trimming or plastic inner fender work. This reduces rubbing risk and helps restore alignment and brake clearance.
- Expect a 2–4 inch suspension lift to fit tires in the 34–35 inch range, depending on wheel width and fender trimming.
- Fender trimming or plastic liner modification may be required for larger tires, and some combinations may affect warranty or ride quality.
- Always verify with the wheel and tire supplier and test carefully for clearance during full steering and compression travel.
Model-year considerations and factory options can change fitment; always consult current Ram technical materials or a professional installer for your exact truck configuration.
Model-year caveats
- 2019–2024 Ram 1500 trims with 18" or 20" wheels have varied stock tire sizes; refer to the owner's manual or the factory brochure for your specific build to know the precise OEM tire diameter.
- Air-suspend versions and certain off-road packages may offer more clearance or different suspension geometry, but still require caution when up-sizing beyond stock specs.
In summary, most stock Ram 1500s can accommodate up to about 33-inch tires without lifting; larger sizes generally require a leveling kit or a suspension lift and possible trimming. Always check fitment for your exact model and consult a professional if you’re unsure.
Summary
For a stock Ram 1500, you can typically run around 33-inch tires depending on wheel size and trim. Going beyond that usually requires a leveling kit or a suspension lift and possible trimming or adjustments to keep everything in safe, reliable clearance. Always verify fitment for your exact model and consult a professional if you’re unsure.
