LT265/70R17 · LT-metric truck · kPa
379 kPa for LT265/70R17 tyres
- Size
- LT265/70R17
- Class
- LT-metric truck
- Planning PSI
- 55
- Planning bar
- 3.79
kPa
379
3.79 bar · 55 psi · 100 kPa = 1 bar
LT265/70R17 · 55 psi · 3.79 bar · 379 kPa — estimates. Placard wins.
If the gauge only speaks kPa, 379 kPa is the sketch for this LT-metric truck size. Fine-tune to the vehicle that actually wears LT265/70R17. A 10 °C overnight drop takes roughly 1 psi (0.07 bar) off a closed LT265/70R17. LT-metric sizes print a load range. The vehicle door sticker, not the LT sidewall maximum, is still the operating pressure.
kPa, bar and PSI
Use the table, then set a cold gauge. 379 kPa is 100 × 3.79 bar on this size.
| kPa | Bar | PSI |
|---|---|---|
| 303 | 3.03 | 44 |
| 317 | 3.17 | 46 |
| 345 | 3.45 | 50 |
| 352 | 3.52 | 51 |
| 359 | 3.59 | 52 |
| 365 | 3.65 | 53 |
| 372 | 3.72 | 54 |
| 379 | 3.79 | 55 |
| 386 | 3.86 | 56 |
| 393 | 3.93 | 57 |
| 400 | 4.00 | 58 |
| 407 | 4.07 | 59 |
| 414 | 4.14 | 60 |
| 421 | 4.21 | 61 |
| 427 | 4.27 | 62 |
| 434 | 4.34 | 63 |
| 441 | 4.41 | 64 |
| 448 | 4.48 | 65 |
| 455 | 4.55 | 66 |
| 462 | 4.62 | 67 |
| 552 | 5.52 | 80 |
Estimated LT265/70R17 pressure by load
These LT265/70R17 load steps are ± a few PSI from 55. They are not a licence to ignore a printed second column on a van or estate.
| Condition | Front (est.) | Rear (est.) |
|---|---|---|
| Driver only / unladen | 55 psi / 3.79 bar / 379 kPa | 58 psi / 4 bar / 400 kPa |
| Typical occupancy | 56 psi / 3.86 bar / 386 kPa | 60 psi / 4.14 bar / 414 kPa |
| Payload / towing (sketch) | 57 psi / 3.93 bar / 393 kPa | 67 psi / 4.62 bar / 462 kPa |
What LT265/70R17 means
LT265/70R17 means a 265 millimetre section width, a sidewall that is 70 percent of that width, on a 17-inch rim. The R is radial construction.
Typical LT 17-inch. Rim diameter 17 in; section 265 mm. Estimates on this page assume a typical load index for the LT-metric truck class.
Placard versus sidewall
If a forum says “all LT265/70R17 run 55 psi”, ignore it. A Qashqai and a Golf can share a size and not share a sticker.
Temperature drift
Roughly 1 psi per 5–6 °C. The table uses 55 psi as a 20 °C baseline for LT265/70R17.
| Ambient | Gauge | 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 for this size sketch |
| 30 °C | 57 psi | 3.93 bar | 393 kPa | Do not bleed a hot LT265/70R17 |
| 38 °C (heatwave tarmac) | 58 psi | 4 bar | 400 kPa | Do not bleed a hot LT265/70R17 |
How to set LT265/70R17
- Park so the LT265/70R17 tyres are cold (three hours, or less than about a mile).
- Read the door-pillar placard for that car — not the LT265/70R17 sidewall maximum.
- If the sticker is missing, 55 psi / 3.79 bar is only a LT-metric truck planning figure for this size.
- Set all four with a calibrated gauge. A 3 psi miss on one corner shows up as a wander.
- Refit valve caps and reset TPMS if the handbook asks for a relearn.
Cars often seen on LT265/70R17
These catalogue models are often seen on LT265/70R17 or a close OEM neighbour. Open the vehicle chart for axle-specific PSI and bar.
A cheap gauge and a monthly habit will do more for a set of LT265/70R17 than nitrogen upsells.
Questions about LT265/70R17
What is LT265/70R17 in kPa?
379 kPa is the planning midpoint (100 kPa = 1 bar). 386 kPa is one PSI higher.
Is LT265/70R17 the same as a plus-size swap?
Only if that is the size you fitted. Overall diameter should stay close to OEM. Pressure still follows the car, with load index at or above original.
What PSI should LT265/70R17 tyres be?
A LT-metric truck planning figure is about 55 psi cold (3.79 bar / 379 kPa). Confirm on the vehicle placard — two cars can share LT265/70R17 and not share a sticker.
Can I run LT265/70R17 at a lower pressure for comfort?
Not as a habit. A soft LT265/70R17 cooks the shoulders and dulls steering. Keep load index and stay on the placard.
When does TPMS warn on LT265/70R17?
Direct TPMS typically flags about 25% below target — near 41 psi if you were aiming at 55. Fill to the sticker, not to the lamp.
Handbook: placard · bar vs PSI · cold inflation · all sizes