RAM · 1500 · Bar
RAM 1500 tyre pressure in bar
- Drivetrain
- rear-wheel drive
- Body
- pickup / double-cab
- PSI F / R
- 32-35 / 32-35
- Bar F / R
- 2.2-2.4 / 2.2-2.4
bar
2.31 / 2.31
32-35 / 32-35 psi · 231 / 231 kPa
32-35 psi F · 32-35 psi R · 2.2-2.4 / 2.2-2.4 bar · 231/231 kPa
2.3 bar is not 23 psi. On this 1500 2.2-2.4 bar converts to about 32-35 psi. Use the table, not a guess. A 10 °C overnight drop takes roughly 1 psi (0.07 bar) off a closed RAM tyre. Commercial and load-biased bodies like this pickup / double-cab often need a higher rear; LT or C-type sizes such as LT245/75R16 are not filled like a Fiesta.
Bar, PSI and kPa
Bar-led conversions around the RAM 1500. 2.2-2.4 bar is not “32-35 divided by ten”.
| Bar | PSI | kPa |
|---|---|---|
| 2.07 | 30 | 207 |
| 2.21 | 32 | 221 |
| 2.28 | 33 | 228 |
| 2.31 | 33.5 | 231 |
| 2.41 | 35 | 241 |
| 2.48 | 36 | 248 |
| 2.62 | 38 | 262 |
| 2.76 | 40 | 276 |
| 3.03 | 44 | 303 |
| 3.45 | 50 | 345 |
| 4.14 | 60 | 414 |
RAM 1500 placard versus sidewall
If the RAM sticker is painted over, the handbook is next. This website is a map, not a replacement VIN label.
Estimated pressure by tyre size (275/65R18 and others)
275/65R18 is the first planning size here. LT245/75R16 is usually the plus-size or LT step. Keep load index at or above original equipment.
| Tyre size | Front PSI | Rear PSI | Front bar | Rear bar | Front kPa | Rear kPa | Note |
|---|---|---|---|---|---|---|---|
| 275/65R18 | 37 | 40 | 2.55 | 2.76 | 255 | 276 | Plus-size 18-inch |
| 255/65R17 | 37 | 39 | 2.55 | 2.69 | 255 | 269 | Highway 17-inch |
| LT245/75R16 | 42 | 46 | 2.9 | 3.17 | 290 | 317 | LT-metric, higher load |
| 245/70R16 | 36 | 38 | 2.48 | 2.62 | 248 | 262 | Common 16-inch all-terrain |
| 235/75R15 | 35 | 37 | 2.41 | 2.55 | 241 | 255 | Older compact truck |
| 265/70R17 | 37 | 39 | 2.55 | 2.69 | 255 | 269 | Typical 17-inch load tyre |
| 285/70R17 | 38 | 41 | 2.62 | 2.83 | 262 | 283 | Wide all-terrain |
| LT265/70R17 | 42 | 48 | 2.9 | 3.31 | 290 | 331 | LT 17-inch |
Load notes
Load moves the rear of a pickup / double-cab first. If the factory placard already has a “laden” column, use that instead of these sketches.
| Condition | Front (est.) | Rear (est.) |
|---|---|---|
| Driver only | 34 psi / 2.34 bar | 34 psi / 2.34 bar |
| Full occupancy | 34 psi / 2.34 bar | 35 psi / 2.41 bar |
| Payload / towing | 35 psi / 2.41 bar | 36 psi / 2.48 bar |
How to set the 1500
- Measure before the school run, not after the M25.
- Write LF / RF / RR / RL. Do not keep 1500 numbers in your head.
- Add air in short bursts toward 34 psi (2.31 bar) front and 34 psi rear.
- If one corner is 4 psi down, hunt for a nail before you blame the weather.
- Log date, ambient temperature and the four readings.
Temperature drift
Roughly 1 psi per 5–6 °C. The table uses 34 psi as a 20 °C baseline for this 1500.
| Ambient | Gauge (front mid) | Bar | kPa | Note |
|---|---|---|---|---|
| −5 °C (hard frost) | 31 psi | 2.14 bar | 214 kPa | Gauge reads low; do not overfill once warm |
| 0 °C | 32 psi | 2.21 bar | 221 kPa | Gauge reads low; do not overfill once warm |
| 8 °C (UK winter morning) | 33 psi | 2.28 bar | 228 kPa | Gauge reads low; do not overfill once warm |
| 20 °C (set cold here) | 34 psi | 2.34 bar | 234 kPa | Baseline |
| 30 °C | 36 psi | 2.48 bar | 248 kPa | Do not bleed a hot tyre |
| 38 °C (heatwave tarmac) | 37 psi | 2.55 bar | 255 kPa | Do not bleed a hot tyre |
RAM notes
No special RAM exception: the 1500 uses the door-pillar placard. Size estimates on this page only help if you have left the original load index behind.
Spare and inflator kit
A matching full-size spare on the RAM 1500 usually follows the higher axle (often the rear, near 32-35 psi). A space-saver is commonly 60 psi / 4.1 bar — read that tyre’s own sidewall. An inflator kit is not a spare; check the sealant date.
Keep the RAM 1500 on the printed band; use 275/65R18 and LT245/75R16 only as a map for non-OEM wheels.
Other RAM models
Questions about this 1500
What is that in bar and kPa for the 1500?
Mid-points are about 2.31 bar (231 kPa) front and 2.31 bar (231 kPa) rear.
What PSI if I plus-size toward LT245/75R16?
Keep load index at or above OEM. Low-profile sizes usually stay at or slightly above the placard. Use 275/65R18, 255/65R17 and LT245/75R16 as a planning band.
Should I bleed pressure after a motorway run?
No. Heat raises the gauge. Set cold only. Bleeding a hot tyre leaves it low the next morning.
What tyre pressure should a RAM 1500 use?
Catalogue reference is 32-35 psi front and 32-35 psi rear (2.2-2.4 / 2.2-2.4 bar), cold. Confirm on the door-pillar placard.
Is the sidewall number correct on a RAM 1500?
No. Sidewall PSI is a maximum. The 1500 placard is the operating target, near 32-35/32-35 psi.
Handbook: placard · bar vs PSI · front vs rear · cold inflation