DAF · 400 · Rear
Rear axle PSI and bar on the DAF 400
- 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 DAF 400 is 45-65 psi / 3.1-4.5 bar. Size estimates on this page include 275/65R18, 245/70R16 and LT265/70R17 — interpolated from the catalogue midpoint, not a second factory sticker.
DAF 400 placard versus sidewall
Sidewall PSI is a carcass maximum. Recommended operating pressure for this 400 is the pillar sticker, near 40/55 psi.
Estimated pressure by tyre size (275/65R18 and others)
Planning cold pressures for sizes often seen on a light commercial. This 400 sample opens with 275/65R18, then 245/70R16 and LT265/70R17.
| Tyre size | Front PSI | Rear PSI | Front bar | Rear bar | Front kPa | Rear kPa | Note |
|---|---|---|---|---|---|---|---|
| 275/65R18 | — | 61 | — | 4.21 | — | 421 | Plus-size 18-inch |
| 245/70R16 | — | 59 | — | 4.07 | — | 407 | Common 16-inch all-terrain |
| LT265/70R17 | — | 69 | — | 4.76 | — | 476 | LT 17-inch |
| 255/65R17 | — | 60 | — | 4.14 | — | 414 | Highway 17-inch |
| 235/75R15 | — | 58 | — | 4 | — | 400 | Older compact truck |
| LT245/75R16 | — | 67 | — | 4.62 | — | 462 | LT-metric, higher load |
| 285/70R17 | — | 62 | — | 4.27 | — | 427 | Wide all-terrain |
| 265/70R17 | — | 60 | — | 4.14 | — | 414 | Typical 17-inch load tyre |
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 | 41 psi / 2.83 bar | 57 psi / 3.93 bar |
| Motorway + luggage | 42 psi / 2.9 bar | 58 psi / 4 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 400.
How to set the 400
- Measure before the school run, not after the M25.
- Write LF / RF / RR / RL. Do not keep 400 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 DAF 400 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 400.
| 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 |
DAF notes
No special DAF exception: the 400 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 DAF 400 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 DAF sticker and this page disagree, the sticker wins.
Other DAF models
Questions about this 400
Front versus rear on the DAF 400?
This row is 35-45 F / 45-65 R. Even when they match, a laden rear can justify a higher number if the sticker prints one.
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.
Is the sidewall number correct on a DAF 400?
No. Sidewall PSI is a maximum. The 400 placard is the operating target, near 35-45/45-65 psi.
How often should I check a 400?
Monthly, before a long trip, and after a 10 °C weather swing. Include a full-size spare.
What is that in bar and kPa for the 400?
Mid-points are about 2.76 bar (276 kPa) front and 3.79 bar (379 kPa) rear.
Handbook: placard · bar vs PSI · front vs rear · cold inflation