175/70R14 · passenger car · Overview
Recommended pressure for 175/70R14 tyres
- Size
- 175/70R14
- Class
- passenger car
- Planning PSI
- 32
- Planning bar
- 2.21
175/70R14
32 psi / 2.21 bar
221 kPa · estimates for this size class
175/70R14 · 32 psi · 2.21 bar · 221 kPa — estimates. Placard wins.
Searches for “175/70R14 pressure” usually want a number. Use 32 psi (2.21 bar) only as a sketch; the door-pillar placard on the car that wears this size still wins. Under-inflation cooks the shoulders of a 175/70R14; over-inflation wears the centre rib and bangs every cat’s eye.
What 175/70R14 means
A 175/70R14 on a passenger car is a geometry. Two cars can share the size and disagree on PSI because mass and axle split differ.
Taller 14-inch compact. Rim diameter 14 in; section 175 mm. Estimates on this page assume a typical load index for the passenger car class.
Estimated 175/70R14 pressure by load
Plus-sizing to 175/70R14 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 | 32 psi / 2.21 bar / 221 kPa | 32 psi / 2.21 bar / 221 kPa |
| Typical occupancy | 32 psi / 2.21 bar / 221 kPa | 33 psi / 2.28 bar / 228 kPa |
| Motorway + luggage (sketch) | 33 psi / 2.28 bar / 228 kPa | 34 psi / 2.34 bar / 234 kPa |
PSI, bar and kPa
1 bar ≈ 14.5 psi; 1 psi ≈ 6.89 kPa. Planning midpoint for 175/70R14: 32 psi = 2.21 bar = 221 kPa.
| PSI | Bar | kPa |
|---|---|---|
| 28 | 1.93 | 193 |
| 29 | 2.00 | 200 |
| 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 |
Placard versus sidewall
This website maps size searches such as “175/70R14 psi”. It does not replace the VIN label. If the two disagree, the label wins.
Cars often seen on 175/70R14
These catalogue models are often seen on 175/70R14 or a close OEM neighbour. Open the vehicle chart for axle-specific PSI and bar.
How to set 175/70R14
- Park so the 175/70R14 tyres are cold (three hours, or less than about a mile).
- Read the door-pillar placard for that car — not the 175/70R14 sidewall maximum.
- If the sticker is missing, 32 psi / 2.21 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 32 psi as a 20 °C baseline for 175/70R14.
| Ambient | Gauge | Bar | kPa | Note |
|---|---|---|---|---|
| −5 °C (hard frost) | 29 psi | 2 bar | 200 kPa | Gauge reads low; do not overfill once warm |
| 0 °C | 30 psi | 2.07 bar | 207 kPa | Gauge reads low; do not overfill once warm |
| 8 °C (UK winter morning) | 31 psi | 2.14 bar | 214 kPa | Gauge reads low; do not overfill once warm |
| 20 °C (set cold here) | 32 psi | 2.21 bar | 221 kPa | Baseline for this size sketch |
| 30 °C | 34 psi | 2.34 bar | 234 kPa | Do not bleed a hot 175/70R14 |
| 38 °C (heatwave tarmac) | 35 psi | 2.41 bar | 241 kPa | Do not bleed a hot 175/70R14 |
A cheap gauge and a monthly habit will do more for a set of 175/70R14 than nitrogen upsells.
Questions about 175/70R14
What is 175/70R14 in bar?
32 psi is 2.21 bar. Add a tenth of a bar if the placard’s laden column is higher, which is common on vans that wear this size.
When does TPMS warn on 175/70R14?
Direct TPMS typically flags about 25% below target — near 24 psi if you were aiming at 32. Fill to the sticker, not to the lamp.
Is 175/70R14 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 PSI should 175/70R14 tyres be?
A passenger car planning figure is about 32 psi cold (2.21 bar / 221 kPa). Confirm on the vehicle placard — two cars can share 175/70R14 and not share a sticker.
What is 175/70R14 in kPa?
221 kPa is the planning midpoint (100 kPa = 1 bar). 228 kPa is one PSI higher.
Handbook: placard · bar vs PSI · cold inflation · all sizes