205/45R17 · passenger car · PSI
205/45R17 tyre pressure in PSI
- Size
- 205/45R17
- Class
- passenger car
- Planning PSI
- 35
- Planning bar
- 2.41
psi
35
2.41 bar · 241 kPa · passenger car planning figure
205/45R17 · 35 psi · 2.41 bar · 241 kPa — estimates. Placard wins.
PSI is the garage-hose number. For 205/45R17 a typical passenger car planning figure is 35 psi cold — about 2.41 bar or 241 kPa. TPMS typically warns near 26 psi (about 25% below a 35 psi target). That is already a soft tyre. 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.
Estimated 205/45R17 pressure by load
These 205/45R17 load steps are ± a few PSI from 35. They are not a licence to ignore a printed second column on a van or estate.
| Condition | Front (est.) | Rear (est.) |
|---|---|---|
| Driver only / unladen | 35 psi / 2.41 bar / 241 kPa | 35 psi / 2.41 bar / 241 kPa |
| Typical occupancy | 35 psi / 2.41 bar / 241 kPa | 36 psi / 2.48 bar / 248 kPa |
| Motorway + luggage (sketch) | 36 psi / 2.48 bar / 248 kPa | 37 psi / 2.55 bar / 255 kPa |
PSI, bar and kPa
Use the table, then set a cold gauge. 241 kPa is 100 × 2.41 bar on this size.
| PSI | Bar | kPa |
|---|---|---|
| 31 | 2.14 | 214 |
| 32 | 2.21 | 221 |
| 33 | 2.28 | 228 |
| 34 | 2.34 | 234 |
| 35 | 2.41 | 241 |
| 36 | 2.48 | 248 |
| 37 | 2.55 | 255 |
| 38 | 2.62 | 262 |
| 39 | 2.69 | 269 |
| 40 | 2.76 | 276 |
| 41 | 2.83 | 283 |
| 42 | 2.90 | 290 |
| 43 | 2.96 | 296 |
| 44 | 3.03 | 303 |
| 45 | 3.10 | 310 |
| 46 | 3.17 | 317 |
| 47 | 3.24 | 324 |
What 205/45R17 means
Read 205/45R17 as width / aspect R rim. Nothing in the size string is a pressure. Pressure lives on the car, not moulded as 205 or 55.
Sport 17-inch compact. Rim diameter 17 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 “205/45R17 psi”. It does not replace the VIN label. If the two disagree, the label wins.
Cars often seen on 205/45R17
These catalogue models are often seen on 205/45R17 or a close OEM neighbour. Open the vehicle chart for axle-specific PSI and bar.
How to set 205/45R17
- Park so the 205/45R17 tyres are cold (three hours, or less than about a mile).
- Read the door-pillar placard for that car — not the 205/45R17 sidewall maximum.
- If the sticker is missing, 35 psi / 2.41 bar is only a passenger car 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.
Temperature drift
Roughly 1 psi per 5–6 °C. The table uses 35 psi as a 20 °C baseline for 205/45R17.
| Ambient | Gauge | Bar | kPa | Note |
|---|---|---|---|---|
| −5 °C (hard frost) | 32 psi | 2.21 bar | 221 kPa | Gauge reads low; do not overfill once warm |
| 0 °C | 33 psi | 2.28 bar | 228 kPa | Gauge reads low; do not overfill once warm |
| 8 °C (UK winter morning) | 34 psi | 2.34 bar | 234 kPa | Gauge reads low; do not overfill once warm |
| 20 °C (set cold here) | 35 psi | 2.41 bar | 241 kPa | Baseline for this size sketch |
| 30 °C | 37 psi | 2.55 bar | 255 kPa | Do not bleed a hot 205/45R17 |
| 38 °C (heatwave tarmac) | 38 psi | 2.62 bar | 262 kPa | Do not bleed a hot 205/45R17 |
If the door sticker and this 205/45R17 page disagree, the sticker wins.
Questions about 205/45R17
Is 205/45R17 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 is 205/45R17 in kPa?
241 kPa is the planning midpoint (100 kPa = 1 bar). 248 kPa is one PSI higher.
Can I run 205/45R17 at a lower pressure for comfort?
Not as a habit. A soft 205/45R17 cooks the shoulders and dulls steering. Keep load index and stay on the placard.
What is 205/45R17 in bar?
35 psi is 2.41 bar. Add a tenth of a bar if the placard’s laden column is higher, which is common on vans that wear this size.
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 · cold inflation · all sizes