Mercedes S Class Tyre Pressures

Manufacturer-recommended front and rear pressures for every S Class tyre size and variant — in psi, bar or kPa.

6
Wheel sizes
11
Model variants
£37
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Find the right pressure for your Mercedes S Class

Not sure of your wheel size? It's the last number in the tyre size on your sidewall.

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How to check

Checking your Mercedes S Class tyre pressure

Two minutes at home or on a garage forecourt is all it takes.

Find your pressure

Look up your tyre size in the pressure chart, or check the sticker inside the driver's door jamb or fuel filler flap.

Check the tyres cold

Recommended figures are cold pressures — measure before driving, or at least a couple of hours after a journey.

Top up all four monthly

Check every tyre (and the spare) once a month and before long trips, then refit the valve caps securely.

Tyre Pressure Chart

Recommended pressures for your Mercedes S Class

Cold inflation pressures as recommended by Mercedes. Use the laden figures when the car is fully loaded with passengers or luggage.

Tyre sizeFrontFront (loaded)RearRear (loaded)
205/65 R15 94V S-CLASS 420 33 psi2.3 bar228 kPa 33 psi2.3 bar228 kPa 33 psi2.3 bar228 kPa 33 psi2.3 bar228 kPa
225/60 R15 96V S-CLASS 420 33 psi2.3 bar228 kPa 33 psi2.3 bar228 kPa 33 psi2.3 bar228 kPa 33 psi2.3 bar228 kPa
225/55 R16 96V S-CLASS 420 33 psi2.3 bar228 kPa 33 psi2.3 bar228 kPa 33 psi2.3 bar228 kPa 33 psi2.3 bar228 kPa
225/60 R16 100H S-CLASS 29 psi2.0 bar200 kPa ––– 32 psi2.2 bar221 kPa –––
225/60 R16 98V S-CLASS 29 psi2.0 bar200 kPa 35 psi2.4 bar241 kPa 30 psi2.1 bar207 kPa 42 psi2.9 bar290 kPa
225/60 R16 98V S-CLASS S320 29 psi2.0 bar200 kPa 32 psi2.2 bar221 kPa 30 psi2.1 bar207 kPa 39 psi2.7 bar269 kPa
235/60 R16 104W S-CLASS 34 psi2.3 bar234 kPa ––– 35 psi2.4 bar241 kPa –––
235/60 R16 104W S-CLASS S320 34 psi2.3 bar234 kPa ––– 35 psi2.4 bar241 kPa –––
245/50 R16 98W S-CLASS 420 33 psi2.3 bar228 kPa 33 psi2.3 bar228 kPa 33 psi2.3 bar228 kPa 33 psi2.3 bar228 kPa
225/55 R17 97W S-CLASS 29 psi2.0 bar200 kPa 35 psi2.4 bar241 kPa 30 psi2.1 bar207 kPa 42 psi2.9 bar290 kPa
225/55 R17 97W S-CLASS S320 29 psi2.0 bar200 kPa 32 psi2.2 bar221 kPa 30 psi2.1 bar207 kPa 39 psi2.7 bar269 kPa
235/55 R17 99W S-CLASS S320 35 psi2.4 bar241 kPa 39 psi2.7 bar269 kPa 38 psi2.6 bar262 kPa 42 psi2.9 bar290 kPa
235/55 R17 99H S-CLASS S350 35 psi2.4 bar241 kPa 39 psi2.7 bar269 kPa 38 psi2.6 bar262 kPa 42 psi2.9 bar290 kPa
235/55 R17 99W S-CLASS S350 35 psi2.4 bar241 kPa 39 psi2.7 bar269 kPa 38 psi2.6 bar262 kPa 42 psi2.9 bar290 kPa
245/55 R17 102V S-CLASS 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
245/55 R17 102V S-CLASS MAYBACH 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
245/55 R17 102V S-CLASS S 35 psi2.4 bar241 kPa 39 psi2.7 bar269 kPa 38 psi2.6 bar262 kPa 45 psi3.1 bar310 kPa
245/55 R17 102V S-CLASS S300 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
245/55 R17 102V S-CLASS S320 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
245/55 R17 102V S-CLASS S350 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
245/55 R17 102V S-CLASS S400 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
245/55 R17 102V S-CLASS S500 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
245/55 R17 102V S-CLASS S63 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
245/45 R18 96W S-CLASS 29 psi2.0 bar200 kPa 35 psi2.4 bar241 kPa ––– –––
245/45 R18 96Y S-CLASS 29 psi2.0 bar200 kPa 35 psi2.4 bar241 kPa ––– –––
245/45 R18 96W S-CLASS S320 29 psi2.0 bar200 kPa 32 psi2.2 bar221 kPa ––– –––
245/45 R18 96Y S-CLASS S320 34 psi2.3 bar234 kPa ––– ––– –––
245/45 R18 96W S-CLASS S500 34 psi2.3 bar234 kPa ––– ––– –––
245/45 R18 96W S-CLASS S600 34 psi2.3 bar234 kPa ––– ––– –––
245/50 R18 104V S-CLASS MAYBACH 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
245/50 R18 100W S-CLASS MAYBACH 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
245/50 R18 100H S-CLASS S 35 psi2.4 bar241 kPa 39 psi2.7 bar269 kPa 38 psi2.6 bar262 kPa 45 psi3.1 bar310 kPa
245/50 R18 104T S-CLASS S 35 psi2.4 bar241 kPa 39 psi2.7 bar269 kPa 38 psi2.6 bar262 kPa 45 psi3.1 bar310 kPa
245/50 R18 100V S-CLASS S 35 psi2.4 bar241 kPa 39 psi2.7 bar269 kPa ––– –––
245/50 R18 104V S-CLASS S 35 psi2.4 bar241 kPa 39 psi2.7 bar269 kPa 38 psi2.6 bar262 kPa 42 psi2.9 bar290 kPa
245/50 R18 100W S-CLASS S 32 – 35 psi2.2 – 2.4 bar221 – 241 kPa 32 – 39 psi2.2 – 2.7 bar221 – 269 kPa 32 – 38 psi2.2 – 2.6 bar221 – 262 kPa 32 – 42 psi2.2 – 2.9 bar221 – 290 kPa
245/50 R18 100Y S-CLASS S 35 psi2.4 bar241 kPa 39 psi2.7 bar269 kPa 38 psi2.6 bar262 kPa 42 psi2.9 bar290 kPa
245/50 R18 104V S-CLASS S300 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
245/50 R18 100W S-CLASS S300 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
245/50 R18 104V S-CLASS S320 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
245/50 R18 100W S-CLASS S320 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
245/50 R18 100H S-CLASS S350 35 psi2.4 bar241 kPa 39 psi2.7 bar269 kPa 38 psi2.6 bar262 kPa 45 psi3.1 bar310 kPa
245/50 R18 104T S-CLASS S350 35 psi2.4 bar241 kPa 39 psi2.7 bar269 kPa 38 psi2.6 bar262 kPa 45 psi3.1 bar310 kPa
245/50 R18 100V S-CLASS S350 35 psi2.4 bar241 kPa 39 psi2.7 bar269 kPa ––– –––
245/50 R18 104V S-CLASS S350 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
245/50 R18 100W S-CLASS S350 35 psi2.4 bar241 kPa 39 psi2.7 bar269 kPa 38 psi2.6 bar262 kPa 45 psi3.1 bar310 kPa
245/50 R18 104V S-CLASS S400 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
245/50 R18 100W S-CLASS S400 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
245/50 R18 100H S-CLASS S500 35 psi2.4 bar241 kPa 39 psi2.7 bar269 kPa 38 psi2.6 bar262 kPa 45 psi3.1 bar310 kPa
245/50 R18 104V S-CLASS S500 35 psi2.4 bar241 kPa 39 psi2.7 bar269 kPa 38 psi2.6 bar262 kPa 45 psi3.1 bar310 kPa
245/50 R18 100W S-CLASS S500 35 psi2.4 bar241 kPa 39 psi2.7 bar269 kPa ––– –––
245/50 R18 100Y S-CLASS S500 35 psi2.4 bar241 kPa 39 psi2.7 bar269 kPa 38 psi2.6 bar262 kPa 45 psi3.1 bar310 kPa
245/50 R18 104V S-CLASS S63 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
245/50 R18 100W S-CLASS S63 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
255/45 R18 99Y S-CLASS 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 36 psi2.5 bar248 kPa 36 psi2.5 bar248 kPa
255/45 R18 99Y S-CLASS S320 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
255/45 R18 99Y S-CLASS S350 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
255/45 R18 99Y S-CLASS S400 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
255/45 R18 99Y S-CLASS S500 35 – 38 psi2.4 – 2.6 bar241 – 262 kPa 35 – 42 psi2.4 – 2.9 bar241 – 290 kPa 35 – 36 psi2.4 – 2.5 bar241 – 248 kPa 35 – 42 psi2.4 – 2.9 bar241 – 290 kPa
255/45 R18 99Y S-CLASS S600 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
255/45 R18 99Y S-CLASS S63 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
265/40 R18 96W S-CLASS ––– ––– 35 psi2.4 bar241 kPa 42 psi2.9 bar290 kPa
265/40 R18 96W S-CLASS S320 ––– ––– 35 psi2.4 bar241 kPa –––
265/40 R18 96W S-CLASS S500 ––– ––– 35 psi2.4 bar241 kPa –––
265/40 R18 96W S-CLASS S600 ––– ––– 35 psi2.4 bar241 kPa –––
275/40 R18 96Y S-CLASS ––– ––– 35 psi2.4 bar241 kPa –––
275/40 R18 96Y S-CLASS S320 ––– ––– 35 psi2.4 bar241 kPa –––
275/45 R18 103V S-CLASS S ––– ––– 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
275/45 R18 103W S-CLASS S ––– ––– 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
275/45 R18 103Y S-CLASS S ––– ––– 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
245/40 R19 96Y S-CLASS 34 psi2.3 bar234 kPa ––– ––– –––
245/40 R19 96Y S-CLASS S320 34 psi2.3 bar234 kPa ––– ––– –––
245/45 R19 102V S-CLASS MAYBACH 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
245/45 R19 102Y S-CLASS MAYBACH 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
245/45 R19 102H S-CLASS S 35 psi2.4 bar241 kPa 39 psi2.7 bar269 kPa 38 psi2.6 bar262 kPa 42 psi2.9 bar290 kPa
245/45 R19 102V S-CLASS S 35 psi2.4 bar241 kPa 39 psi2.7 bar269 kPa 38 psi2.6 bar262 kPa 42 psi2.9 bar290 kPa
245/45 R19 102Y S-CLASS S 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
245/45 R19 102V S-CLASS S300 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
245/45 R19 102Y S-CLASS S300 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
245/45 R19 102V S-CLASS S320 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
245/45 R19 102Y S-CLASS S320 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
245/45 R19 102V S-CLASS S350 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
245/45 R19 102Y S-CLASS S350 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
245/45 R19 102V S-CLASS S63 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
245/45 R19 102Y S-CLASS S63 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
255/40 R19 96Y S-CLASS 35 psi2.4 bar241 kPa ––– 37 psi2.6 bar255 kPa –––
255/40 R19 100Y S-CLASS S 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
255/40 R19 100Y S-CLASS S350 34 psi2.3 bar234 kPa ––– ––– –––
255/40 R19 100Y S-CLASS S500 33 psi2.3 bar228 kPa ––– ––– –––
255/40 R19 100Y S-CLASS S63 36 psi2.5 bar248 kPa 41 psi2.8 bar283 kPa ––– –––
255/45 R19 104V S-CLASS MAYBACH 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
255/45 R19 104Y S-CLASS MAYBACH 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
255/45 R19 104V S-CLASS S 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
255/45 R19 104Y S-CLASS S 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa ––– –––
255/45 R19 104Y S-CLASS S500 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
255/45 R19 104V S-CLASS S63 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
255/45 R19 104Y S-CLASS S63 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
275/35 R19 96Y S-CLASS ––– ––– 35 psi2.4 bar241 kPa –––
275/35 R19 96Y S-CLASS S320 ––– ––– 35 psi2.4 bar241 kPa –––
275/40 R19 105V S-CLASS S ––– ––– 38 psi2.6 bar262 kPa 42 psi2.9 bar290 kPa
275/40 R19 101W S-CLASS S ––– ––– 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
275/40 R19 101Y S-CLASS S ––– ––– 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
275/40 R19 105Y S-CLASS S ––– ––– 38 psi2.6 bar262 kPa 42 psi2.9 bar290 kPa
275/40 R19 100Y S-CLASS S350 ––– ––– 37 psi2.6 bar255 kPa –––
275/40 R19 101Y S-CLASS S500 ––– ––– 36 psi2.5 bar248 kPa –––
275/40 R19 101Y S-CLASS S63 ––– ––– 36 psi2.5 bar248 kPa 41 psi2.8 bar283 kPa
285/40 R19 107V S-CLASS S ––– ––– 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
285/40 R19 107Y S-CLASS S ––– ––– 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
245/40 R20 99V S-CLASS S 35 psi2.4 bar241 kPa 39 psi2.7 bar269 kPa ––– –––
245/40 R20 99Y S-CLASS S 35 psi2.4 bar241 kPa 39 psi2.7 bar269 kPa ––– –––
255/35 R20 97Y S-CLASS 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
255/35 R20 97Y S-CLASS S320 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
255/35 R20 97Y S-CLASS S350 34 psi2.3 bar234 kPa ––– ––– –––
255/35 R20 97Y S-CLASS S400 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
255/35 R20 97Y S-CLASS S500 33 – 35 psi2.3 – 2.4 bar228 – 241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
255/35 R20 97Y S-CLASS S600 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
255/35 R20 97Y S-CLASS S63 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
255/40 R20 101V S-CLASS MAYBACH 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
255/40 R20 101V S-CLASS S 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
255/40 R20 101Y S-CLASS S 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa ––– –––
255/40 R20 101V S-CLASS S63 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
275/35 R20 102V S-CLASS S ––– ––– 38 psi2.6 bar262 kPa 42 psi2.9 bar290 kPa
275/35 R20 102Y S-CLASS S ––– ––– 38 psi2.6 bar262 kPa 42 psi2.9 bar290 kPa
275/35 R20 102Y S-CLASS S350 32 psi2.2 bar221 kPa 32 psi2.2 bar221 kPa 32 psi2.2 bar221 kPa 32 psi2.2 bar221 kPa
275/35 R20 97Y S-CLASS S350 ––– ––– 37 psi2.6 bar255 kPa –––
275/35 R20 102Y S-CLASS S500 ––– ––– 36 psi2.5 bar248 kPa –––
285/35 R20 104V S-CLASS S ––– ––– 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa
285/35 R20 104Y S-CLASS S ––– ––– 35 psi2.4 bar241 kPa 35 psi2.4 bar241 kPa

Always double-check against the tyre placard inside the driver's door or your Mercedes handbook — pressures can vary by exact specification and year.

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Why it matters

The right pressure pays for itself

Tyres naturally lose around 1–2 psi a month, and more in cold weather — so even careful drivers end up under-inflated. Running your S Class below Mercedes's recommended pressure increases rolling resistance, which means more fuel burned, faster shoulder wear and longer braking distances in the wet.

Over-inflating isn't the answer either: too much air shrinks the tyre's contact patch, wearing the centre of the tread and making grip and ride quality worse. The recommended figures in the chart are the sweet spot — and if you're carrying a full load of passengers or luggage, switch to the laden values before you set off.

How pressure shapes your grip on the road

Under-inflated Only the shoulders touch — vague steering, extra fuel, hot edges
Correct pressure Full, even contact — best grip, wear and fuel economy
Over-inflated Just the centre grips — harsher ride, faster middle wear

The red zones are where a mis-inflated tyre carries the load — and where it wears out first.

Help & Advice

Tyre pressure questions, answered

What tyre pressure should a Mercedes S Class be?
It depends on your tyre size and variant — most S Class fitments sit roughly between 30 and 38 psi (about 2.1–2.6 bar). Use the chart on this page to find your exact size, and confirm against the sticker inside the driver's door jamb or your handbook.
Where do I find the recommended pressure on the car?
Most Mercedes models have a tyre placard inside the driver's door jamb; some print it inside the fuel filler flap or glovebox lid. It lists front and rear pressures for each approved tyre size, including fully-laden figures. The owner's handbook has the same table.
When should I use the laden pressures?
Use the laden (loaded) figures when the car is carrying close to a full load — four or five occupants, a packed boot, or towing. The extra pressure supports the added weight and keeps the car stable. Drop back to the normal figures once you've unloaded.
What's the difference between psi, bar and kPa?
They're just different units for the same pressure. UK forecourt gauges usually read psi (pounds per square inch), European handbooks often quote bar, and kPa (kilopascals) appears on many door stickers. 1 bar = 14.5 psi = 100 kPa — or simply switch units on the pressure chart.
How often should I check my tyre pressures?
Once a month, and always before a long journey or when loading the car up. Tyres lose air naturally, and a visual glance won't spot a few psi missing. Check them cold, and if one tyre keeps losing pressure faster than the rest, have it inspected — it may have a slow puncture.
Still stuck? Chat with our team — we're happy to help. 🙂

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