4 PCS Car Tire Tyre Pressure Monitor Valve Stem Caps 3 Colors Air Valve Caps Warning Safety Case Cover Sensor Indicator Car Tyre Valve Dust Caps for Cars Motorcycle Bikes

Fantastic very smart item 👌

Don’t buy these! Biggest waste of money. One of them seized on the valve and when trying to take it off , broke the valve leading to an entirely flat tyre . Luckily was just at home . They do not change, as advertised to show pressure.

Presumably it was fine but it was bought as a “stocking filler” for a friend who has trouble knowing if her tyres need pumping up so I have no personal experience of using them.

Good idea but can’t tell if they work correctly

Too long, stick out too far.

Didn't expect them to work but they do. One of my tyres tends to go down slowly and they really help me, as soon as it starts to show yellow I pump it up. The tyre looks ok to me but the pressure has dropped.

Bought these tyre dust caps for their chrome appeal and possible psi inflation use. Value for money, after inflating tyres to correct pressure and screwing on to each tyre valve they immediately turn green indicating correct pressure. This means each time I start the vehicle just a cursory glance at wheel valves showing green reassures me of correct tyre pressure! Magic 🎩 Obviously turning yellow or red represents tyre deflation.

Not that great at all, they have been on my car about a week or less and one of the coloured caps came off while I was driving which caused the tyre to get extremely flat during driving on the dual carriageway! It had gone to below 10 when I pumped it back up! Very unsafe and I had my 6 year old child in the car at that time