215/50R17 · passenger car · Overview
Recommended pressure for 215/50R17 tyres
- Size
- 215/50R17
- Class
- passenger car
- Planning PSI
- 34
- Planning bar
- 2.34
215/50R17
34 psi / 2.34 bar
234 kPa · estimates for this size class
215/50R17 · 34 psi · 2.34 bar · 234 kPa — estimates. Placard wins.
215/50R17 is a passenger car size (215 mm section, 50 % aspect, 17-inch rim). A planning cold figure around 34 psi / 2.34 bar / 234 kPa is a starting map, not a second factory sticker. TPMS typically warns near 26 psi (about 25% below a 34 psi target). That is already a soft tyre.
What 215/50R17 means
215/50R17 means a 215 millimetre section width, a sidewall that is 50 percent of that width, on a 17-inch rim. The R is radial construction.
Plus-size 17-inch touring. Rim diameter 17 in; section 215 mm. Estimates on this page assume a typical load index for the passenger car class.
Estimated 215/50R17 pressure by load
These 215/50R17 load steps are ± a few PSI from 34. They are not a licence to ignore a printed second column on a van or estate.
| 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 |
PSI, bar and kPa
Convert around the 215/50R17 band. 2.34 bar is about 34 psi — not 23, not 33 unless the maths says so.
| PSI | Bar | kPa |
|---|---|---|
| 30 | 2.07 | 207 |
| 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 |
Placard versus sidewall
The sidewall of a 215/50R17 may say 51 psi or 350 kPa. That is a carcass maximum. Operating pressure is the tyre-information placard on the driver’s door pillar.
Cars often seen on 215/50R17
These catalogue models are often seen on 215/50R17 or a close OEM neighbour. Open the vehicle chart for axle-specific PSI and bar.
How to set 215/50R17
- Park so the 215/50R17 tyres are cold (three hours, or less than about a mile).
- Read the door-pillar placard for that car — not the 215/50R17 sidewall maximum.
- If the sticker is missing, 34 psi / 2.34 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 34 psi as a 20 °C baseline for 215/50R17.
| 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 215/50R17 |
| 38 °C (heatwave tarmac) | 37 psi | 2.55 bar | 255 kPa | Do not bleed a hot 215/50R17 |
A cheap gauge and a monthly habit will do more for a set of 215/50R17 than nitrogen upsells.
Questions about 215/50R17
Can I run 215/50R17 at a lower pressure for comfort?
Not as a habit. A soft 215/50R17 cooks the shoulders and dulls steering. Keep load index and stay on the placard.
What is 215/50R17 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.
Is the sidewall number correct for 215/50R17?
No. Sidewall PSI or kPa is a maximum for the carcass. Operating pressure is the door-pillar placard.
Is 215/50R17 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.
What is 215/50R17 in kPa?
234 kPa is the planning midpoint (100 kPa = 1 bar). 241 kPa is one PSI higher.
Handbook: placard · bar vs PSI · cold inflation · all sizes