Each of the inflators tested here has a gauge that gives you an instant readout that lets you know whether the tyre needs pumping. To use them, simply remove the dust cap from the valve on the tyre and push the end of the air hose over it, before pressing or releasing any catch to clamp it in place. Petrol station tyre inflators have pressure gauges, too, but these aren’t always accurate so it’s best to test using your own equipment. And this isn't theoretical. A worrying portion of cars on British roads( TyreSafe claim around 50%) have underinflated tyres, and it's responsible for about a third of car accidents where vehicle defect is a contributing factor. It is therefore very important to point out how tyre negligence can pose a real risk to not only you but other people. How a tyre gauge can help

Some inflators have 12V ports so they can effectively be used as an extension lead that connects other accessories to your car’s power. If your car isn’t fitted with a USB port, it’s useful to have a tyre inflator with this feature so that you can charge a tablet or smartphone on the road. While analogue gauges deliver reliable readings, digital devices are often more accurate because they can often provide pressure readings to the decimal point. They're also easier to read, meaning you're less likely to take an incorrect measurement. Using tire warmers makes it possible to reach operating pressure more rapidly. In no cases does the use of tire warmers make it possible to start with a lower pressure. The main aim of using tire warmers is to reach the optimum operating pressure faster to save on warm-up time at the beginning of the ride. Some like our Michelin 240V superfast digital inflator plugs into your household mains if you’re worried about your cars battery. It will also inflate faster! Our Halfords Advance tyre inflator does both 12v and 240v! While others are rechargeable and don’t need to be plugged in to use, like our Michelin mini rechargeable inflator which is great for topping up tyre pressure where ever you are.