205/50R17 · passenger car · Bar
205/50R17 tyre pressure in bar
- Size
- 205/50R17
- Class
- passenger car
- Planning PSI
- 34
- Planning bar
- 2.34
bar
2.34
34 psi · 234 kPa · not a second factory sticker
205/50R17 · 34 psi · 2.34 bar · 234 kPa — estimates. Placard wins.
A 205/50R17 C-type or LT carcass can live far above a hatchback bar figure. This page’s 2.34 bar sketch is for the passenger car class, not every car that can physically mount the tyre. A 10 °C overnight drop takes roughly 1 psi (0.07 bar) off a closed 205/50R17. Low-profile {sz} does not want a “softer” pressure to recover ride. Stay at or slightly above the car’s original placard if load index is kept.
Bar, PSI and kPa
Use the table, then set a cold gauge. 234 kPa is 100 × 2.34 bar on this size.
| Bar | PSI | kPa |
|---|---|---|
| 2.07 | 30 | 207 |
| 2.14 | 31 | 214 |
| 2.21 | 32 | 221 |
| 2.28 | 33 | 228 |
| 2.34 | 34 | 234 |
| 2.41 | 35 | 241 |
| 2.48 | 36 | 248 |
| 2.55 | 37 | 255 |
| 2.62 | 38 | 262 |
| 2.69 | 39 | 269 |
| 2.76 | 40 | 276 |
| 2.83 | 41 | 283 |
| 2.90 | 42 | 290 |
| 2.96 | 43 | 296 |
| 3.03 | 44 | 303 |
| 3.10 | 45 | 310 |
| 3.17 | 46 | 317 |
Estimated 205/50R17 pressure by load
Plus-sizing to 205/50R17 from a taller OEM tyre usually keeps the same placard if the load index is equal or higher.
| Condition | Front (est.) | Rear (est.) |
|---|---|---|
| Driver only / unladen | 34 psi / 2.34 bar / 234 kPa | 34 psi / 2.34 bar / 234 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 |
Placard versus sidewall
If a forum says “all 205/50R17 run 34 psi”, ignore it. A Qashqai and a Golf can share a size and not share a sticker.
What 205/50R17 means
205/50R17 means a 205 millimetre section width, a sidewall that is 50 percent of that width, on a 17-inch rim. The R is radial construction.
17-inch compact plus-size. Rim diameter 17 in; section 205 mm. Estimates on this page assume a typical load index for the passenger car class.
Cars often seen on 205/50R17
These catalogue models are often seen on 205/50R17 or a close OEM neighbour. Open the vehicle chart for axle-specific PSI and bar.
How to set 205/50R17
- Measure before the school run, not after the motorway.
- Write LF / RF / RR / RL. Do not keep 205/50R17 numbers in your head.
- Add air in short bursts toward the placard, using 34 psi only as a map.
- If one 205/50R17 is 4 psi down, hunt for a nail before you blame the weather.
- Log date, ambient temperature and the four readings.
Temperature drift
Roughly 1 psi per 5–6 °C. The table uses 34 psi as a 20 °C baseline for 205/50R17.
| Ambient | Gauge | Bar | kPa | Note |
|---|---|---|---|---|
| −5 °C (hard frost) | 31 psi | 2.14 bar | 214 kPa | Gauge reads low; do not overfill once warm |
| 0 °C | 32 psi | 2.21 bar | 221 kPa | Gauge reads low; do not overfill once warm |
| 8 °C (UK winter morning) | 33 psi | 2.28 bar | 228 kPa | Gauge reads low; do not overfill once warm |
| 20 °C (set cold here) | 34 psi | 2.34 bar | 234 kPa | Baseline for this size sketch |
| 30 °C | 36 psi | 2.48 bar | 248 kPa | Do not bleed a hot 205/50R17 |
| 38 °C (heatwave tarmac) | 37 psi | 2.55 bar | 255 kPa | Do not bleed a hot 205/50R17 |
A cheap gauge and a monthly habit will do more for a set of 205/50R17 than nitrogen upsells.
Questions about 205/50R17
What is 205/50R17 in kPa?
234 kPa is the planning midpoint (100 kPa = 1 bar). 241 kPa is one PSI higher.
What is 205/50R17 in bar?
34 psi is 2.34 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 205/50R17 at a lower pressure for comfort?
Not as a habit. A soft 205/50R17 cooks the shoulders and dulls steering. Keep load index and stay on the placard.
Is the sidewall number correct for 205/50R17?
No. Sidewall PSI or kPa is a maximum for the carcass. Operating pressure is the door-pillar placard.
Is 205/50R17 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.
Handbook: placard · bar vs PSI · cold inflation · all sizes