235/60R18 · SUV / crossover · kPa
235/60R18 tyre pressure in kPa
- Size
- 235/60R18
- Class
- SUV / crossover
- Planning PSI
- 35
- Planning bar
- 2.41
kPa
241
2.41 bar · 35 psi · 100 kPa = 1 bar
235/60R18 · 35 psi · 2.41 bar · 241 kPa — estimates. Placard wins.
Kilopascals show up on some Asian stickers and ISO sheets. 241 kPa is the planning midpoint for 235/60R18 (2.41 bar / 35 psi). 100 kPa = 1 bar. TPMS typically warns near 26 psi (about 25% below a 35 psi target). That is already a soft tyre.
kPa, bar and PSI
Use the table, then set a cold gauge. 241 kPa is 100 × 2.41 bar on this size.
| kPa | Bar | PSI |
|---|---|---|
| 214 | 2.14 | 31 |
| 221 | 2.21 | 32 |
| 228 | 2.28 | 33 |
| 234 | 2.34 | 34 |
| 241 | 2.41 | 35 |
| 248 | 2.48 | 36 |
| 255 | 2.55 | 37 |
| 262 | 2.62 | 38 |
| 269 | 2.69 | 39 |
| 276 | 2.76 | 40 |
| 283 | 2.83 | 41 |
| 290 | 2.90 | 42 |
| 296 | 2.96 | 43 |
| 303 | 3.03 | 44 |
| 310 | 3.10 | 45 |
| 317 | 3.17 | 46 |
| 324 | 3.24 | 47 |
Estimated 235/60R18 pressure by load
Plus-sizing to 235/60R18 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 | 35 psi / 2.41 bar / 241 kPa | 35 psi / 2.41 bar / 241 kPa |
| Typical occupancy | 36 psi / 2.48 bar / 248 kPa | 37 psi / 2.55 bar / 255 kPa |
| Motorway + luggage (sketch) | 37 psi / 2.55 bar / 255 kPa | 38 psi / 2.62 bar / 262 kPa |
What 235/60R18 means
A 235/60R18 on a SUV / crossover is a geometry. Two cars can share the size and disagree on PSI because mass and axle split differ.
Plus-size 18-inch SUV. Rim diameter 18 in; section 235 mm. Estimates on this page assume a typical load index for the SUV / crossover class.
Placard versus sidewall
The sidewall of a 235/60R18 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.
Temperature drift
Roughly 1 psi per 5–6 °C. The table uses 35 psi as a 20 °C baseline for 235/60R18.
| 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 235/60R18 |
| 38 °C (heatwave tarmac) | 38 psi | 2.62 bar | 262 kPa | Do not bleed a hot 235/60R18 |
How to set 235/60R18
- Park so the 235/60R18 tyres are cold (three hours, or less than about a mile).
- Read the door-pillar placard for that car — not the 235/60R18 sidewall maximum.
- If the sticker is missing, 35 psi / 2.41 bar is only a SUV / crossover 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.
Cars often seen on 235/60R18
These catalogue models are often seen on 235/60R18 or a close OEM neighbour. Open the vehicle chart for axle-specific PSI and bar.
Keep 235/60R18 on the printed band for that car; 35 psi is a size sketch, not a second VIN label.
Questions about 235/60R18
When does TPMS warn on 235/60R18?
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 235/60R18 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 235/60R18 and not share a sticker.
What is 235/60R18 in kPa?
241 kPa is the planning midpoint (100 kPa = 1 bar). 248 kPa is one PSI higher.
Is 235/60R18 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