2025 RAM 1500 tire size
Most common factory size
P275/65R18
- Factory sizes
- 5
- Across 14 trims
- Trims with it
- 6 of 14
- Trims with no size
- 33
- Diameter
- 32.07 in
- Revs per mile
- 629
Tire sizes by trim
Source marks: one source
| Size | Trims | Width, mm | Sidewall, % of width | Rim, in | Diameter, in | Sidewall, in | Revs per mile |
|---|---|---|---|---|---|---|---|
| P275/65R18 | Tradesman Crew Cab RWD, Crew Cab Tradesman 4WD, Big Horn Crew Cab RWD, Lone Star Crew Cab RWD, Crew Cab Big Horn 4WD, Crew Cab Lone Star 4WD | 275 | 65 | 18 | 32.07 | 7.04 | 629 |
| P275/55R20 | Laramie Crew Cab RWD, Crew Cab Laramie 4WD, Crew Cab Limited 4WD, Crew Cab Limited Longhorn 4WD | 275 | 55 | 20 | 31.91 | 5.95 | 632 |
| LT275/70R18 | Crew Cab Warlock 4WD, Crew Cab Rebel 4WD | 275 | 70 | 18 | 33.16 | 7.58 | 608 |
| LT325/65R18 | Crew Cab RHO 4WD | 325 | 65 | 18 | 34.63 | 8.32 | 582 |
| P285/45R22 | Crew Cab Tungsten 4WD | 285 | 45 | 22 | 32.10 | 5.05 | 628 |
What P275/65R18 means
| Part | Number | Meaning |
|---|---|---|
| Type | P | Passenger car tire. |
| Width | 275 mm | Tread width. 10.8 in. |
| Sidewall | 65 | Sidewall height is 65% of the width. |
| Construction | R | Radial tire. |
| Rim | 18 in | Fits 18 in wheels. |
Other sizes that fit
Within 3% of the stock diameter. A common shop guideline, not a maker spec.
| Size | Rim, in | Diameter, in | Change | Speedo reads at 60 mph |
|---|---|---|---|---|
| 255/75R17 | 17 | 32.06 | -0.0% | 60.0 mph |
| 255/70R18 | 18 | 32.06 | -0.1% | 60.0 mph |
| 255/65R19 | 19 | 32.05 | -0.1% | 60.0 mph |
| 235/80R17 | 17 | 31.80 | -0.8% | 60.5 mph |
| 245/75R18 | 18 | 32.47 | +1.2% | 59.3 mph |
| 265/70R17 | 17 | 31.61 | -1.5% | 60.9 mph |
| 265/65R18 | 18 | 31.56 | -1.6% | 61.0 mph |
| 285/65R18 | 18 | 32.59 | +1.6% | 59.1 mph |
| Size | Rim, in | Diameter, in | Change | Speedo reads at 60 mph |
|---|---|---|---|---|
| 275/50R21 | 21 | 31.83 | -0.3% | 60.2 mph |
| 305/50R20 | 20 | 32.01 | +0.3% | 59.8 mph |
| 255/60R20 | 20 | 32.05 | +0.4% | 59.7 mph |
| 255/65R19 | 19 | 32.05 | +0.4% | 59.7 mph |
| 245/60R20 | 20 | 31.57 | -1.0% | 60.6 mph |
| 265/55R20 | 20 | 31.48 | -1.4% | 60.8 mph |
| 265/60R20 | 20 | 32.52 | +1.9% | 58.9 mph |
| 285/50R20 | 20 | 31.22 | -2.2% | 61.3 mph |
| Size | Rim, in | Diameter, in | Change | Speedo reads at 60 mph |
|---|---|---|---|---|
| 285/70R17 | 17 | 32.71 | -1.4% | 60.8 mph |
| 265/70R18 | 18 | 32.61 | -1.7% | 61.0 mph |
| 285/65R18 | 18 | 32.59 | -1.7% | 61.1 mph |
| 285/75R17 | 17 | 33.83 | +2.0% | 58.8 mph |
| 245/75R18 | 18 | 32.47 | -2.1% | 61.3 mph |
| Size | Rim, in | Diameter, in | Change | Speedo reads at 60 mph |
|---|---|---|---|---|
| 305/70R18 | 18 | 34.81 | +0.5% | 59.7 mph |
| 285/75R18 | 18 | 34.83 | +0.6% | 59.7 mph |
| 315/70R17 | 17 | 34.36 | -0.8% | 60.5 mph |
| 285/75R17 | 17 | 33.83 | -2.3% | 61.4 mph |
| Size | Rim, in | Diameter, in | Change | Speedo reads at 60 mph |
|---|---|---|---|---|
| 285/40R23 | 23 | 31.98 | -0.4% | 60.2 mph |
| 275/50R21 | 21 | 31.83 | -0.8% | 60.5 mph |
| 265/50R22 | 22 | 32.43 | +1.0% | 59.4 mph |
| 275/45R22 | 22 | 31.74 | -1.1% | 60.7 mph |
| 275/50R22 | 22 | 32.83 | +2.3% | 58.7 mph |
| 295/40R22 | 22 | 31.29 | -2.5% | 61.5 mph |
| 275/55R21 | 21 | 32.91 | +2.5% | 58.5 mph |
Checked against 292 factory sizes listed for 2009-2027 US models.
What this cannot tell you
Tire pressure is on the driver door sticker. Not in this data.
Optional wheel packages may differ.
- Two or more sources agree
- One source
- Model-level or estimate
- Sources differ