RAM · Promaster · Bar
RAM Promaster bar chart (2.2-2.4 / 2.2-2.4)
- Drivetrain
- front-wheel drive
- Body
- van
- 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
European and UK handbooks usually quote bar. The RAM Promaster catalogue is 2.2-2.4 bar front and 2.2-2.4 bar rear (midpoint 2.31 / 2.31). TPMS typically warns near 25 psi (about 25% below target). That is already a soft tyre, not a fill target. Commercial and load-biased bodies like this van often need a higher rear; LT or C-type sizes such as 235/60R17 are not filled like a Fiesta.
Bar, PSI and kPa
Bar-led conversions around the RAM Promaster. 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 Promaster 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 (195/75R16C and others)
If your RAM Promaster no longer wears the OEM diameter, start at the row nearest 195/75R16C or 225/75R16 and confirm with the tyre maker’s load table.
| Tyre size | Front PSI | Rear PSI | Front bar | Rear bar | Front kPa | Rear kPa | Note |
|---|---|---|---|---|---|---|---|
| 195/75R16C | 38 | 42 | 2.62 | 2.9 | 262 | 290 | C-type commercial |
| 225/75R16 | 36 | 39 | 2.48 | 2.69 | 248 | 269 | Taller load range |
| 235/60R17 | 35 | 37 | 2.41 | 2.55 | 241 | 255 | Plus-size van |
| 215/75R16C | 39 | 43 | 2.69 | 2.96 | 269 | 296 | C-type 215 |
| 235/65R16 | 36 | 38 | 2.48 | 2.62 | 248 | 262 | Loaded van |
| 225/65R16 | 35 | 37 | 2.41 | 2.55 | 241 | 255 | Common transaxle van |
| 215/65R16 | 34 | 36 | 2.34 | 2.48 | 234 | 248 | Compact van |
| LT215/85R16 | 40 | 44 | 2.76 | 3.03 | 276 | 303 | LT commercial |
Load notes
Load moves the rear of a van 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 | 35 psi / 2.41 bar | 36 psi / 2.48 bar |
| Payload / towing | 36 psi / 2.48 bar | 36 psi / 2.48 bar |
How to set the Promaster
- Park the RAM Promaster for at least three hours (cold tyres).
- Use a calibrated gauge, not the only meter on a forecourt hose.
- Set the placard for that axle — about 32-35 psi / 2.2-2.4 bar front and 32-35 psi / 2.2-2.4 bar rear on this catalogue row.
- Recheck all four. A 2 psi miss on a front-wheel drive Promaster is enough to feel a pull.
- Refit valve caps and reset TPMS if the handbook asks for a relearn.
Temperature drift
Roughly 1 psi per 5–6 °C. The table uses 34 psi as a 20 °C baseline for this Promaster.
| 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 Promaster 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 Promaster 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.
A cheap gauge and a monthly habit will do more for this Promaster than nitrogen upsells.
Other RAM models
Questions about this Promaster
When does TPMS warn on a RAM Promaster?
Direct TPMS typically flags about 25% below placard — near 25 psi on this row. Fill to the sticker, not to the lamp.
What tyre pressure should a RAM Promaster 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.
What PSI if I plus-size toward 235/60R17?
Keep load index at or above OEM. Low-profile sizes usually stay at or slightly above the placard. Use 195/75R16C, 225/75R16 and 235/60R17 as a planning band.
What is that in bar and kPa for the Promaster?
Mid-points are about 2.31 bar (231 kPa) front and 2.31 bar (231 kPa) rear.
How often should I check a Promaster?
Monthly, before a long trip, and after a 10 °C weather swing. Include a full-size spare.
Handbook: placard · bar vs PSI · front vs rear · cold inflation