UK · EU reference Tyre Pressure

225/55R17 · SUV / crossover · Bar

Recommended bar for 225/55R17

Size
225/55R17
Class
SUV / crossover
Planning PSI
34
Planning bar
2.34

bar

2.34

34 psi · 234 kPa · not a second factory sticker

225/55R17 · 34 psi · 2.34 bar · 234 kPa — estimates. Placard wins.

European stickers print bar. 225/55R17 often sits near 2.34 bar on a SUV / crossover (34 psi / 234 kPa). 2.34 bar is not “34 divided by ten”. TPMS typically warns near 26 psi (about 25% below a 34 psi target). That is already a soft tyre.

Bar, PSI and kPa

Convert around the 225/55R17 band. 2.34 bar is about 34 psi — not 23, not 33 unless the maths says so.

BarPSIkPa
2.0730207
2.1431214
2.2132221
2.2833228
2.3434234
2.4135241
2.4836248
2.5537255
2.6238262
2.6939269
2.7640276
2.8341283
2.9042290
2.9643296
3.0344303
3.1045310
3.1746317

Estimated 225/55R17 pressure by load

Load moves the rear first on a SUV / crossover. If the factory placard already has a laden column, use that — not this sketch for 225/55R17.

ConditionFront (est.)Rear (est.)
Driver only / unladen34 psi / 2.34 bar / 234 kPa34 psi / 2.34 bar / 234 kPa
Typical occupancy35 psi / 2.41 bar / 241 kPa36 psi / 2.48 bar / 248 kPa
Motorway + luggage (sketch)36 psi / 2.48 bar / 248 kPa37 psi / 2.55 bar / 255 kPa

Placard versus sidewall

This website maps size searches such as “225/55R17 psi”. It does not replace the VIN label. If the two disagree, the label wins.

What 225/55R17 means

225/55R17 means a 225 millimetre section width, a sidewall that is 55 percent of that width, on a 17-inch rim. The R is radial construction.

CUV 17-inch highway. Rim diameter 17 in; section 225 mm. Estimates on this page assume a typical load index for the SUV / crossover class.

Cars often seen on 225/55R17

These catalogue models are often seen on 225/55R17 or a close OEM neighbour. Open the vehicle chart for axle-specific PSI and bar.

Nissan QashqaiFord KugaHyundai TucsonMazda CX-5

How to set 225/55R17

  1. Park so the 225/55R17 tyres are cold (three hours, or less than about a mile).
  2. Read the door-pillar placard for that car — not the 225/55R17 sidewall maximum.
  3. If the sticker is missing, 34 psi / 2.34 bar is only a SUV / crossover planning figure for this size.
  4. Set all four with a calibrated gauge. A 3 psi miss on one corner shows up as a wander.
  5. 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 225/55R17.

AmbientGaugeBarkPaNote
−5 °C (hard frost)31 psi2.14 bar214 kPaGauge reads low; do not overfill once warm
0 °C32 psi2.21 bar221 kPaGauge reads low; do not overfill once warm
8 °C (UK winter morning)33 psi2.28 bar228 kPaGauge reads low; do not overfill once warm
20 °C (set cold here)34 psi2.34 bar234 kPaBaseline for this size sketch
30 °C36 psi2.48 bar248 kPaDo not bleed a hot 225/55R17
38 °C (heatwave tarmac)37 psi2.55 bar255 kPaDo not bleed a hot 225/55R17

A cheap gauge and a monthly habit will do more for a set of 225/55R17 than nitrogen upsells.

Questions about 225/55R17

Can I run 225/55R17 at a lower pressure for comfort?

Not as a habit. A soft 225/55R17 cooks the shoulders and dulls steering. Keep load index and stay on the placard.

What PSI should 225/55R17 tyres be?

A SUV / crossover planning figure is about 34 psi cold (2.34 bar / 234 kPa). Confirm on the vehicle placard — two cars can share 225/55R17 and not share a sticker.

Is the sidewall number correct for 225/55R17?

No. Sidewall PSI or kPa is a maximum for the carcass. Operating pressure is the door-pillar placard.

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 225/55R17 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