Caravans-Wohnm · Ultra · kPa
379 kPa front, 379 kPa rear — Caravans-Wohnm Ultra
- Drivetrain
- front-wheel drive
- Body
- passenger car
- PSI F / R
- 45-65 / 45-65
- Bar F / R
- 3.1-4.5 / 3.1-4.5
kPa
379 / 379
3.79 / 3.79 bar · 45-65 / 45-65 psi
45-65 psi F · 45-65 psi R · 3.1-4.5 / 3.1-4.5 bar · 379/379 kPa
If your gauge only speaks kPa, aim near 379 / 379 for this Ultra, then fine-tune to the placard. A 10 °C overnight drop takes roughly 1 psi (0.07 bar) off a closed Caravans-Wohnm tyre.
kPa, bar and PSI
kPa-led conversions. 220 kPa is 2.2 bar and about 32 psi — handy if this Ultra sticker uses SI units.
| kPa | Bar | PSI |
|---|---|---|
| 345 | 3.45 | 50 |
| 379 | 3.79 | 55 |
| 414 | 4.14 | 60 |
| 448 | 4.48 | 65 |
Estimated pressure by tyre size (215/55R16 and others)
Planning cold pressures for sizes often seen on a passenger car. This Ultra sample opens with 215/55R16, then 205/55R16 and 225/45R17.
| Tyre size | Front PSI | Rear PSI | Front bar | Rear bar | Front kPa | Rear kPa | Note |
|---|---|---|---|---|---|---|---|
| 215/55R16 | 50 | 50 | 3.45 | 3.45 | 345 | 345 | Slightly wider 16-inch |
| 205/55R16 | 50 | 50 | 3.45 | 3.45 | 345 | 345 | Typical mid-compact OEM |
| 225/45R17 | 50 | 50 | 3.45 | 3.45 | 345 | 345 | Sport 17-inch |
| 195/65R15 | 50 | 50 | 3.45 | 3.45 | 345 | 345 | Very common compact |
| 185/65R15 | 50 | 50 | 3.45 | 3.45 | 345 | 345 | Small / older car |
| 205/60R16 | 50 | 50 | 3.45 | 3.45 | 345 | 345 | Taller 16-inch |
| 225/50R17 | 50 | 50 | 3.45 | 3.45 | 345 | 345 | Touring 17-inch |
| 245/40R18 | 50 | 50 | 3.45 | 3.45 | 345 | 345 | Wide touring 18-inch |
Caravans-Wohnm Ultra placard versus sidewall
The tyre-information placard on a Caravans-Wohnm Ultra sits on the driver’s door pillar (sometimes the fuel-filler flap). Catalogue figures here are a general band: 45-65 / 45-65 psi.
Temperature drift
Roughly 1 psi per 5–6 °C. The table uses 55 psi as a 20 °C baseline for this Ultra.
| Ambient | Gauge (front mid) | Bar | kPa | Note |
|---|---|---|---|---|
| −5 °C (hard frost) | 52 psi | 3.59 bar | 359 kPa | Gauge reads low; do not overfill once warm |
| 0 °C | 53 psi | 3.65 bar | 365 kPa | Gauge reads low; do not overfill once warm |
| 8 °C (UK winter morning) | 54 psi | 3.72 bar | 372 kPa | Gauge reads low; do not overfill once warm |
| 20 °C (set cold here) | 55 psi | 3.79 bar | 379 kPa | Baseline |
| 30 °C | 57 psi | 3.93 bar | 393 kPa | Do not bleed a hot tyre |
| 38 °C (heatwave tarmac) | 58 psi | 4 bar | 400 kPa | Do not bleed a hot tyre |
How to set the Ultra
- Measure before the school run, not after the M25.
- Write LF / RF / RR / RL. Do not keep Ultra numbers in your head.
- Add air in short bursts toward 55 psi (3.79 bar) front and 55 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.
Load notes
Load moves the rear of a passenger car first. If the factory placard already has a “laden” column, use that instead of these sketches.
| Condition | Front (est.) | Rear (est.) |
|---|---|---|
| Driver only | 50 psi / 3.45 bar | 50 psi / 3.45 bar |
| Full occupancy | 50 psi / 3.45 bar | 50 psi / 3.45 bar |
| Motorway + luggage | 50 psi / 3.45 bar | 50 psi / 3.45 bar |
Caravans-Wohnm notes
No special Caravans-Wohnm exception: the Ultra 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 Caravans-Wohnm Ultra usually follows the higher axle (often the rear, near 45-65 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 Caravans-Wohnm sticker and this page disagree, the sticker wins.
Other Caravans-Wohnm models
Questions about this Ultra
Is the sidewall number correct on a Caravans-Wohnm Ultra?
No. Sidewall PSI is a maximum. The Ultra placard is the operating target, near 45-65/45-65 psi.
What PSI if I plus-size toward 225/45R17?
Keep load index at or above OEM. Low-profile sizes usually stay at or slightly above the placard. Use 215/55R16, 205/55R16 and 225/45R17 as a planning band.
What tyre pressure should a Caravans-Wohnm Ultra use?
Catalogue reference is 45-65 psi front and 45-65 psi rear (3.1-4.5 / 3.1-4.5 bar), cold. Confirm on the door-pillar placard.
Front versus rear on the Caravans-Wohnm Ultra?
This row is 45-65 F / 45-65 R. Even when they match, a laden rear can justify a higher number if the sticker prints one.
How often should I check a Ultra?
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