UK · EU reference Tyre Pressure

235/65R17 · SUV / crossover · Bar

235/65R17 bar chart (2.41 bar planning figure)

Size
235/65R17
Class
SUV / crossover
Planning PSI
35
Planning bar
2.41

bar

2.41

35 psi · 241 kPa · not a second factory sticker

235/65R17 · 35 psi · 2.41 bar · 241 kPa — estimates. Placard wins.

A 235/65R17 C-type or LT carcass can live far above a hatchback bar figure. This page’s 2.41 bar sketch is for the SUV / crossover 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 235/65R17.

Bar, PSI and kPa

1 bar ≈ 14.5 psi; 1 psi ≈ 6.89 kPa. Planning midpoint for 235/65R17: 35 psi = 2.41 bar = 241 kPa.

BarPSIkPa
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
3.2447324

Estimated 235/65R17 pressure by load

These 235/65R17 load steps are ± a few PSI from 35. They are not a licence to ignore a printed second column on a van or estate.

ConditionFront (est.)Rear (est.)
Driver only / unladen35 psi / 2.41 bar / 241 kPa36 psi / 2.48 bar / 248 kPa
Typical occupancy35 psi / 2.41 bar / 241 kPa37 psi / 2.55 bar / 255 kPa
Motorway + luggage (sketch)36 psi / 2.48 bar / 248 kPa38 psi / 2.62 bar / 262 kPa

Placard versus sidewall

The sidewall of a 235/65R17 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.

What 235/65R17 means

Read 235/65R17 as width / aspect R rim. Nothing in the size string is a pressure. Pressure lives on the car, not moulded as 205 or 55.

Common mid-size SUV. Rim diameter 17 in; section 235 mm. Estimates on this page assume a typical load index for the SUV / crossover class.

Cars often seen on 235/65R17

These catalogue models are often seen on 235/65R17 or a close OEM neighbour. Open the vehicle chart for axle-specific PSI and bar.

Land Rover DiscoveryToyota RAV4Hyundai Tucson

How to set 235/65R17

  1. Measure before the school run, not after the motorway.
  2. Write LF / RF / RR / RL. Do not keep 235/65R17 numbers in your head.
  3. Add air in short bursts toward the placard, using 35 psi only as a map.
  4. If one 235/65R17 is 4 psi down, hunt for a nail before you blame the weather.
  5. Log date, ambient temperature and the four readings.

Temperature drift

Roughly 1 psi per 5–6 °C. The table uses 35 psi as a 20 °C baseline for 235/65R17.

AmbientGaugeBarkPaNote
−5 °C (hard frost)32 psi2.21 bar221 kPaGauge reads low; do not overfill once warm
0 °C33 psi2.28 bar228 kPaGauge reads low; do not overfill once warm
8 °C (UK winter morning)34 psi2.34 bar234 kPaGauge reads low; do not overfill once warm
20 °C (set cold here)35 psi2.41 bar241 kPaBaseline for this size sketch
30 °C37 psi2.55 bar255 kPaDo not bleed a hot 235/65R17
38 °C (heatwave tarmac)38 psi2.62 bar262 kPaDo not bleed a hot 235/65R17

If the door sticker and this 235/65R17 page disagree, the sticker wins.

Questions about 235/65R17

What is 235/65R17 in kPa?

241 kPa is the planning midpoint (100 kPa = 1 bar). 248 kPa is one PSI higher.

When does TPMS warn on 235/65R17?

Direct TPMS typically flags about 25% below target — near 26 psi if you were aiming at 35. Fill to the sticker, not to the lamp.

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 PSI should 235/65R17 tyres be?

A SUV / crossover planning figure is about 35 psi cold (2.41 bar / 241 kPa). Confirm on the vehicle placard — two cars can share 235/65R17 and not share a sticker.

Is 235/65R17 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