205/55R15 · passenger car · kPa
205/55R15 tyre pressure in kPa
- Size
- 205/55R15
- Class
- passenger car
- Planning PSI
- 33
- Planning bar
- 2.28
kPa
228
2.28 bar · 33 psi · 100 kPa = 1 bar
205/55R15 · 33 psi · 2.28 bar · 228 kPa — estimates. Placard wins.
If the gauge only speaks kPa, 228 kPa is the sketch for this passenger car size. Fine-tune to the vehicle that actually wears 205/55R15. A 10 °C overnight drop takes roughly 1 psi (0.07 bar) off a closed 205/55R15.
kPa, bar and PSI
Use the table, then set a cold gauge. 228 kPa is 100 × 2.28 bar on this size.
| kPa | Bar | PSI |
|---|---|---|
| 200 | 2.00 | 29 |
| 207 | 2.07 | 30 |
| 214 | 2.14 | 31 |
| 221 | 2.21 | 32 |
| 228 | 2.28 | 33 |
| 234 | 2.34 | 34 |
| 241 | 2.41 | 35 |
| 248 | 2.48 | 36 |
| 255 | 2.55 | 37 |
| 262 | 2.62 | 38 |
| 269 | 2.69 | 39 |
| 276 | 2.76 | 40 |
| 283 | 2.83 | 41 |
| 290 | 2.90 | 42 |
| 296 | 2.96 | 43 |
| 303 | 3.03 | 44 |
| 310 | 3.10 | 45 |
Estimated 205/55R15 pressure by load
These 205/55R15 load steps are ± a few PSI from 33. They are not a licence to ignore a printed second column on a van or estate.
| Condition | Front (est.) | Rear (est.) |
|---|---|---|
| Driver only / unladen | 33 psi / 2.28 bar / 228 kPa | 33 psi / 2.28 bar / 228 kPa |
| Typical occupancy | 34 psi / 2.34 bar / 234 kPa | 35 psi / 2.41 bar / 241 kPa |
| Motorway + luggage (sketch) | 35 psi / 2.41 bar / 241 kPa | 36 psi / 2.48 bar / 248 kPa |
What 205/55R15 means
A 205/55R15 on a passenger car is a geometry. Two cars can share the size and disagree on PSI because mass and axle split differ.
Wider 15-inch compact. Rim diameter 15 in; section 205 mm. Estimates on this page assume a typical load index for the passenger car class.
Placard versus sidewall
This website maps size searches such as “205/55R15 psi”. It does not replace the VIN label. If the two disagree, the label wins.
Temperature drift
Roughly 1 psi per 5–6 °C. The table uses 33 psi as a 20 °C baseline for 205/55R15.
| Ambient | Gauge | Bar | kPa | Note |
|---|---|---|---|---|
| −5 °C (hard frost) | 30 psi | 2.07 bar | 207 kPa | Gauge reads low; do not overfill once warm |
| 0 °C | 31 psi | 2.14 bar | 214 kPa | Gauge reads low; do not overfill once warm |
| 8 °C (UK winter morning) | 32 psi | 2.21 bar | 221 kPa | Gauge reads low; do not overfill once warm |
| 20 °C (set cold here) | 33 psi | 2.28 bar | 228 kPa | Baseline for this size sketch |
| 30 °C | 35 psi | 2.41 bar | 241 kPa | Do not bleed a hot 205/55R15 |
| 38 °C (heatwave tarmac) | 36 psi | 2.48 bar | 248 kPa | Do not bleed a hot 205/55R15 |
How to set 205/55R15
- Measure before the school run, not after the motorway.
- Write LF / RF / RR / RL. Do not keep 205/55R15 numbers in your head.
- Add air in short bursts toward the placard, using 33 psi only as a map.
- If one 205/55R15 is 4 psi down, hunt for a nail before you blame the weather.
- Log date, ambient temperature and the four readings.
Cars often seen on 205/55R15
These catalogue models are often seen on 205/55R15 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 205/55R15 than nitrogen upsells.
Questions about 205/55R15
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.
What is 205/55R15 in kPa?
228 kPa is the planning midpoint (100 kPa = 1 bar). 234 kPa is one PSI higher.
What is 205/55R15 in bar?
33 psi is 2.28 bar. Add a tenth of a bar if the placard’s laden column is higher, which is common on vans that wear this size.
Can I run 205/55R15 at a lower pressure for comfort?
Not as a habit. A soft 205/55R15 cooks the shoulders and dulls steering. Keep load index and stay on the placard.
What PSI should 205/55R15 tyres be?
A passenger car planning figure is about 33 psi cold (2.28 bar / 228 kPa). Confirm on the vehicle placard — two cars can share 205/55R15 and not share a sticker.
Handbook: placard · bar vs PSI · cold inflation · all sizes