More information on quality can be found in this old but still very helpful article from Harvard Business Review. Beneath the screen is a small wheel that allows you to set the pressure that you’d like your tyres inflated, and to switch between three units of pressure: PSI, BAR and kPA. LCD Pressure Gauge】Digital LCD pressure gauge is easy to read, you can preset tire pressure to what your tires need (4 kinds of unit values: PSI, BAR,KPA and Kg/cm²). Cordless tyre inflator, ideal for camping and road trips. The RTC6000 digital tyre inflator can inflate a tyre in just two minutes. Comes with air compressor setting for tyres, and air pump setting for air beds. Can inflate a single airbed in just two minutes.

Fast Inflation: P1S tyre inflator is equipped with permanently usable metal gear that can complete the inflation of a car tyre in less than 6 minutes. The maximum inflatable pressure is 120psi. These Makita and Ryobi models have a beneficial auto cut-off feature, which we appreciated so much. With this function, you can set the desired PSI and the tool will run until it reaches that PSI. Once the preset air pressure is detected, the device cuts off automatically. You can leave your tyre inflator unattended and do something else while it is operating. The Makita MP100DZ also features built-in LED light intended to illuminate the work area, something that nighttime drivers would want to have. On the other hand, the Ryobi R18I-0 includes convenient onboard accessory storage. The unit is small enough to keep in your boot and comes with its own case to keep the dirt out of your car. The 12v connector can be neatly wound away on a spindle, saving the normal tangle you get yourself into. The 3.5m lead isn’t perhaps as long as some on the market but can do the job of reaching the tyre furthest away from the in-car power supply. Finally we tried it on a few flat footballs and a basketball, using the attachment which cleverly slots in the base. Again it was simple to use and fast to inflate - a handy thing to have for when the kids decide they want to play football there and then. Over the time we've used it, we found it has kept its charge well, even when sat in the boot of the car for a few months. Portable Design and Large Capacity: Built-in 2000mAh Lithium battery enables you to measure the real-time pressure and inflate your cars, bikes, balls and other inflatables at any time and anywhere. A 3 meters long 12V car charger and AC home charger adapter are provided for you to charge the P1S tyre inflator in the car or at home. (Note: Please don't use the unit when it is being charged at home.)Intelligent & Automatic inflation】 Audew air compressor could change the unit values among 4 modes concluding PSI, BAR, KPA and KG/CM², just easily press the button " Unit" to change the mode basing on your need. The intelligent technology design will monitor the air pressure of the tyre during the inflation and automaticlly shut down once it reached the preset pressure. Like the Ring RTC1000, its designers have also thought of where to store your valve caps when you’re inflating, and have included a little stand. It doesn’t look quite as snazzy as some of the others, thanks to the fact that it’s adorned in a cheap-looking silver plastic, but after all, you’re squatting on the ground with grease on your hands — elegance is already out of the window. LED Emergency Warning Light】The electric bike pump with LED light, which is not only can provide you with convenient for emergency lighting at night, but also can be as a emergency warning light, it including sigle flash and double flash (Red & Blue) to help you draw attention when you are riding and as a SOS light when the vehicle failing or encountering an accident. It’s convenient and practical.

Again, it’s not the most attractive machine in the world, but again, this is tyre inflation, not Paris Fashion Week. The analogue scale goes from 0psi-100psi, with around a centimetre between each increment of 10psi. That means that the difference between, say, 30psi and 32psi is just a couple of millimetres, making it a tad difficult to know exactly how much pressure you’re putting into your tyres — an issue exacerbated by the fact that the machine moves around a lot as it inflates. Adding to its already impressive collection of product awards, the Ring RTC6000 cordless tyre inflator has recently won this year's What Car? Best Tyre Inflator test. What Car? subjected a variety of tyre inflators to rigorous testing, focusing on speed, accuracy, ease of use, and overall performance. The Ring RTC6000 excelled in all categories, earning it the coveted title of Best Buy! Other Features: 1.5 inches digital LCD display showing target pressure; 4 switchable units: PSI / KPA / BAR/ KG/CM²; tyre inflator automatically stops working when desired (preset) pressure reaches; bright LED light make it convenient to use at night or in dark placesHalfords claims that the inflator can pump an R13 tyre (13 inches in diameter) from flat to 30psi in three minutes, thanks to a flow rate of between 28 and 30 litres per minute. While that might sound good, there are very few modern cars that use R13s — even the tiny Smart ForTwo uses 15-inch tyres. Comes with LED light to make night time inflation easier and safer. Also comes with 10 piece adaptor set for use with tyres, bicycle tyres, motorcycle tyres, balls, airbeds and other small inflatables. Includes case and storage for adaptors.