RAM · Promaster · Cold
RAM Promaster cold-inflation guide
- Drivetrain
- front-wheel drive
- Body
- van
- PSI F / R
- 32-35 / 32-35
- Bar F / R
- 2.2-2.4 / 2.2-2.4
psi
34 / 34
Catalogue mid-points, front / rear · 2.2-2.4 / 2.2-2.4 bar
32-35 psi F · 32-35 psi R · 2.2-2.4 / 2.2-2.4 bar · 231/231 kPa
UK winter mornings will show a lower gauge on this Promaster without a puncture. Set 34/34 psi at ~20 °C equivalent, not after a motorway blast. Under-inflation cooks the shoulders of a Promaster; over-inflation wears the centre rib and bangs every cat’s eye. 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.
Temperature and a cold gauge
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 |
How to set the Promaster
- Measure before the school run, not after the M25.
- Write LF / RF / RR / RL. Do not keep Promaster 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.
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 (225/65R16 and others)
If your RAM Promaster no longer wears the OEM diameter, start at the row nearest 225/65R16 or LT215/85R16 and confirm with the tyre maker’s load table.
| Tyre size | Front PSI | Rear PSI | Front bar | Rear bar | Front kPa | Rear kPa | Note |
|---|---|---|---|---|---|---|---|
| 225/65R16 | 35 | 37 | 2.41 | 2.55 | 241 | 255 | Common transaxle van |
| LT215/85R16 | 40 | 44 | 2.76 | 3.03 | 276 | 303 | LT commercial |
| 235/60R17 | 35 | 37 | 2.41 | 2.55 | 241 | 255 | Plus-size van |
| 225/75R16 | 36 | 39 | 2.48 | 2.69 | 248 | 269 | Taller load range |
| 215/65R16 | 34 | 36 | 2.34 | 2.48 | 234 | 248 | Compact 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 |
| 195/75R16C | 38 | 42 | 2.62 | 2.9 | 262 | 290 | C-type commercial |
PSI, bar and kPa
PSI-led conversions for the RAM Promaster band (32-35 / 32-35).
| PSI | Bar | kPa |
|---|---|---|
| 30 | 2.07 | 207 |
| 32 | 2.21 | 221 |
| 33 | 2.28 | 228 |
| 33.5 | 2.31 | 231 |
| 35 | 2.41 | 241 |
| 36 | 2.48 | 248 |
| 38 | 2.62 | 262 |
| 40 | 2.76 | 276 |
| 44 | 3.03 | 303 |
| 50 | 3.45 | 345 |
| 60 | 4.14 | 414 |
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 | 37 psi / 2.55 bar |
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.
If the RAM sticker and this page disagree, the sticker wins.
Other RAM models
Questions about this Promaster
Is the sidewall number correct on a RAM Promaster?
No. Sidewall PSI is a maximum. The Promaster placard is the operating target, near 32-35/32-35 psi.
How often should I check a Promaster?
Monthly, before a long trip, and after a 10 °C weather swing. Include a full-size spare.
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.
Front versus rear on the RAM Promaster?
This row is 32-35 F / 32-35 R. Even when they match, a laden rear can justify a higher number if the sticker prints one.
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.
Handbook: placard · bar vs PSI · front vs rear · cold inflation