Trucks-Lkw · O & K · Rear
Rear axle PSI and bar on the Trucks-Lkw O & K
- Drivetrain
- front-wheel drive
- Body
- light commercial
- PSI F / R
- 35-45 / 45-65
- Bar F / R
- 2.4-3.1 / 3.1-4.5
psi rear
55
3.79 bar · 379 kPa at the rear axle
35-45 psi F · 45-65 psi R · 2.4-3.1 / 3.1-4.5 bar · 276/379 kPa
The rear of a light commercial takes passengers, luggage and, on vans, payload. Catalogue rear pressure on the Trucks-Lkw O & K is 45-65 psi / 3.1-4.5 bar. Size estimates on this page include LT245/75R16, 275/65R18 and 255/65R17 — interpolated from the catalogue midpoint, not a second factory sticker.
Trucks-Lkw O & K placard versus sidewall
The tyre-information placard on a Trucks-Lkw O & K sits on the driver’s door pillar (sometimes the fuel-filler flap). Catalogue figures here are a general band: 35-45 / 45-65 psi.
Estimated pressure by tyre size (LT245/75R16 and others)
If your Trucks-Lkw O & K no longer wears the OEM diameter, start at the row nearest LT245/75R16 or 275/65R18 and confirm with the tyre maker’s load table.
| Tyre size | Front PSI | Rear PSI | Front bar | Rear bar | Front kPa | Rear kPa | Note |
|---|---|---|---|---|---|---|---|
| LT245/75R16 | — | 67 | — | 4.62 | — | 462 | LT-metric, higher load |
| 275/65R18 | — | 61 | — | 4.21 | — | 421 | Plus-size 18-inch |
| 255/65R17 | — | 60 | — | 4.14 | — | 414 | Highway 17-inch |
| 245/70R16 | — | 59 | — | 4.07 | — | 407 | Common 16-inch all-terrain |
| 285/70R17 | — | 62 | — | 4.27 | — | 427 | Wide all-terrain |
| 265/70R17 | — | 60 | — | 4.14 | — | 414 | Typical 17-inch load tyre |
| LT265/70R17 | — | 69 | — | 4.76 | — | 476 | LT 17-inch |
| 235/75R15 | — | 58 | — | 4 | — | 400 | Older compact truck |
Pressure against load
Load moves the rear of a light commercial first. If the factory placard already has a “laden” column, use that instead of these sketches.
| Condition | Front (est.) | Rear (est.) |
|---|---|---|
| Driver only | 40 psi / 2.76 bar | 55 psi / 3.79 bar |
| Full occupancy | 40 psi / 2.76 bar | 56 psi / 3.86 bar |
| Motorway + luggage | 41 psi / 2.83 bar | 59 psi / 4.07 bar |
A family light commercial with a boot full of luggage should use the laden rear figure if Ford, VW or Mercedes printed one. Otherwise the modest steps in the load table are only a sketch for this O & K.
How to set the O & K
- Measure before the school run, not after the M25.
- Write LF / RF / RR / RL. Do not keep O & K numbers in your head.
- Add air in short bursts toward 40 psi (2.76 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.
PSI, bar and kPa
PSI-led conversions for the Trucks-Lkw O & K band (35-45 / 45-65).
| PSI | Bar | kPa |
|---|---|---|
| 35 | 2.41 | 241 |
| 36 | 2.48 | 248 |
| 38 | 2.62 | 262 |
| 40 | 2.76 | 276 |
| 44 | 3.03 | 303 |
| 45 | 3.10 | 310 |
| 50 | 3.45 | 345 |
| 55 | 3.79 | 379 |
| 60 | 4.14 | 414 |
| 65 | 4.48 | 448 |
Temperature drift
Roughly 1 psi per 5–6 °C. The table uses 40 psi as a 20 °C baseline for this O & K.
| Ambient | Gauge (front mid) | Bar | kPa | Note |
|---|---|---|---|---|
| −5 °C (hard frost) | 37 psi | 2.55 bar | 255 kPa | Gauge reads low; do not overfill once warm |
| 0 °C | 38 psi | 2.62 bar | 262 kPa | Gauge reads low; do not overfill once warm |
| 8 °C (UK winter morning) | 39 psi | 2.69 bar | 269 kPa | Gauge reads low; do not overfill once warm |
| 20 °C (set cold here) | 40 psi | 2.76 bar | 276 kPa | Baseline |
| 30 °C | 42 psi | 2.9 bar | 290 kPa | Do not bleed a hot tyre |
| 38 °C (heatwave tarmac) | 43 psi | 2.96 bar | 296 kPa | Do not bleed a hot tyre |
Trucks-Lkw notes
No special Trucks-Lkw exception: the O & K 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 Trucks-Lkw O & K 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.
A cheap gauge and a monthly habit will do more for this O & K than nitrogen upsells.
Other Trucks-Lkw models
Questions about this O & K
What PSI if I plus-size toward 255/65R17?
Keep load index at or above OEM. Low-profile sizes usually stay at or slightly above the placard. Use LT245/75R16, 275/65R18 and 255/65R17 as a planning band.
Is the sidewall number correct on a Trucks-Lkw O & K?
No. Sidewall PSI is a maximum. The O & K placard is the operating target, near 35-45/45-65 psi.
What is that in bar and kPa for the O & K?
Mid-points are about 2.76 bar (276 kPa) front and 3.79 bar (379 kPa) rear.
How often should I check a O & K?
Monthly, before a long trip, and after a 10 °C weather swing. Include a full-size spare.
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.
Handbook: placard · bar vs PSI · front vs rear · cold inflation