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Correct tyre pressure in the UK

Updated: 21.10.2026

You have a Michelin inflator in the boot and a number on its screen, and that number is not the pressure the car is asking for. The correct tyre pressure in the UK is the maker's cold figure for the load, printed on the placard, not the sidewall maximum and not the pump's ceiling. The models on the [Michelin air compressor comparison](/hub/compressors/michelin-air-compressor) are examples. Choosing between them is the [buying guide](/hub/compressors/michelin-air-compressor/sub/michelin-air-compressor-buying-guide). The button sequence is [how to use a Michelin tyre inflator](/hub/compressors/michelin-air-compressor/sub/michelin-air-compressor-how-to-use). This is not a lab, and a qualifying purchase can earn us a commission at no extra cost to you.

You have a Michelin inflator in the boot and a number on its screen, and that number is not the pressure the car is asking for.

Our top picks

Michelin Michelin 009519 12V programmable compressor

Best overall

Michelin Michelin 009519 12V programmable compressor
8.6/10about £48.26
View offer
Michelin Michelin 27012 rapid 12V inflator

Alternative

Michelin Michelin 27012 rapid 12V inflator
7.2/10about £46.47
View offer
Michelin Michelin 27010 digital micro inflator

Best value

Michelin Michelin 27010 digital micro inflator
6.6/10about £30.69
View offer
On this page
  1. 1.The number is on the car, not on the Michelin box
  2. 2.Cold, warm, and the monthly habit
  3. 3.A warning lamp is not a pressure
  4. 4.When not to use the inflator

The number is on the car, not on the Michelin box

Read the placard on the driver's door pillar, the fuel flap, or the handbook. TyreSafe says to use that figure, not the maximum on the sidewall. Set the load that matches this journey. The unit has to match. Then enter the placard's own digits. The ceilings on these Michelin listings, from 100 psi to 150 psi or 6.9 bar, are not the setting. The 009518 title says 3.5 bar while its table says 6.9 bar. That clash does not change the placard. If the inflator will not show the sticker's unit, stop and use a gauge that will. Highway Code annex 6 tells you to follow the maker's recommended pressures. The regulations do not print your psi.

Cold, warm, and the monthly habit

Cold means the car has not been driven, or has been driven only a short distance. TyreSafe uses about two miles as that short distance. Highway Code annex 6 says to check weekly when the tyres are cold. TyreSafe says at least monthly and before a long journey. Weekly is the Code. Monthly is the charity's minimum. A pump in the boot does not check itself. Michelin's UK advice says a tyre can lose about 0.1 bar a month, to check cold, and not to let air out of a hot tyre. If you must read a warm tyre, add about 0.3 bar and recheck cold. That 0.3 bar is a holding figure, not a new placard. If a cold 2.4 bar reads 2.6 bar after a supermarket stop, leave it.
Michelin Michelin 009519 12V programmable compressor

Testsieger

Michelin Michelin 009519 12V programmable compressor
8.6/10about £48.26
View offer

A warning lamp is not a pressure

A TPMS lamp means the system wants you to look. TyreSafe says that if the lamp comes on you should stop somewhere safe and check the tyres against the placard. The lamp is not a psi reading. Many cars first registered from 1 January 2012 have TPMS checked as a lamp at the MOT. The MOT inspection manual does not gauge your psi, and a lamp that is off is not proof the pressures match the sticker. Tread is a different test: 1.6 mm across the central three-quarters. Being a little under the placard is not, by itself, an MOT line.

When not to use the inflator

Do not inflate a tyre with a bulge, exposed cord, or a bead off the rim. Do not kneel in a live lane. Highway Code annex 6 says to stop in a safe place if you cannot change a wheel safely. Do not continue if the screen will not show the sticker's unit. A psi-only display against a bar placard is how people set 2.4 psi or 35 bar. If the display goes dark mid-fill, stop. After a correct cold set, refit the valve cap and check the spare if the placard gives it a figure. The job ends when the gauge matches the sticker, cold, in the right unit. It does not end at the maximum on the box.

Common questions

Can I let air out after a drive?
Michelin UK says not to let air out of a hot tyre. If you drop a warm tyre to the cold placard, it will sit low once it cools. Leave a mildly high hot reading alone. If you had to set a pressure while the tyre was warm, Michelin's note is to add about 0.3 bar to the recommended figure and check again cold. Do not treat 0.3 bar as a permanent extra.
Does TPMS mean I can skip a gauge?
No. TyreSafe says a monitoring system does not replace a manual check at least monthly and before a long journey. If the lamp comes on, stop somewhere safe and compare each tyre with the placard. The lamp does not give you the psi. An MOT can check that the lamp system is present on many cars from 1 January 2012. That check is not a gauge reading of your pressures.
Will the wrong pressure fail an MOT by itself?
The MOT manual does not measure psi against the placard. A fail on this part of the test is about condition, tread of at least 1.6 mm, and, where fitted, the TPMS warning system, not about you being 2 psi low. You should still set the maker's cold pressure. Low pressure is a handling and wear problem even when it is not an MOT line item.
What if my Michelin only shows psi?
Set psi only if the placard is in psi. If the placard is in bar and you cannot switch the unit, stop and use a bar gauge. One 27012 review reports a psi-only gauge. The 27010 guide describes a mode button for bar and kPa. That button is that model's guide, not a promise on every Michelin listing.
When do I stop and call for help?
Stop if the tyre is bulging, cut to the cord, or off the bead, if you cannot get out of the traffic lane safely, or if the pump will not show a pressure you can compare with the sticker. A preset does not fix a damaged tyre. Call a breakdown service rather than adding air and driving on. A cold set to the placard is the job only when the tyre looks intact and you are in a safe place.

Related pages

Best Michelin tyre inflator

Michelin air compressor

Michelin cordless vs 12V inflator: lead or battery

Michelin tyre inflator: which model should you buy

How to use a Michelin tyre inflator without a mistake

Sources

Public UK sources and the manufacturer pages below. amazon.co.uk listings checked on 19 October 2026.

  1. amazon.co.uk: Michelin 009519 and the other four listings in this set (retrieved 19 October 2026)
  2. Impex: Michelin 009519 (retrieved 19 October 2026)
  3. Ideas International: Michelin 27012 (retrieved 19 October 2026)
  4. Michelin UK: inflate your tyres (retrieved 19 October 2026)
  5. Highway Code annex 6: vehicle maintenance, safety and security (retrieved 19 October 2026)
  6. Construction and Use regulation 27 (retrieved 19 October 2026)
  7. MOT inspection manual: axles, wheels, tyres and suspension (retrieved 19 October 2026)
  8. HSE INDG178: compressed air safety (retrieved 19 October 2026)
  9. Consumer Rights Act 2015, section 22 (retrieved 19 October 2026)