Most car tire inflators come with meters that measure the value of pressure in psi, bar, and sometimes also in kPa(kilopascal).
So what are PSI, Bar, Kpa, and what’s the difference?
PSI stands for “pounds per square inch”, which is used to measure either pressure or stress.
The bar is a unit of measurement which gives the pressure as the force applied perpendicularly on a unit area. It’s like pounds per square inch (PSI), but just in different form.
So Psi, Bar, KiloPascal ( kPa ), e.t.c are all units of pressure.
The conversion between bar, psi and kpa are as below.
1bar=14.5PSI=100kpa
Achieving a specific pressure when inflating tires is important because over-inflating can cause damage and under-inflation will decrease tire life.
As we know,A vehicle tire has a certain pressure depending on its size. Before inflating the tire, we must be sure of the psi of your car.
Normally, the pressure is often listed in an easily accessible location like on a sticker or inside driver’s door. If you don’t have those available to refer too, then check around for owner’s manual information that might provide this crucial detail.
In case you can’t find it. you can take below chart as a reference.
| PSI | Bar | Kpa | Infomation | |
| Basketballs,etc. | 7.5 to 8.5 PSI | 0.52 to 0.58 bar | 52 to 58 kpa | Check Detail |
| Bicycle | 80 to 140 PSI for road tires,50 to 70 PSI for hybrid tires | to 9.6 bar for road tires,3.5 to 4.8 bar for hybrid tires | 550 to 960 kpa350 to 480 kpa | Check Details |
| Motorbike | 28 to 40 PSI | 1.9 to 2.75 Bar | 190 to 275 kpa | Check manual or Ask manufacturer |
| Sedan Cars | 32 to 35 PSI | 2.2 to 2.4 Bar | 220 to 240 kpa | Click |
| Suv , Vans | 32 to 35 PSI to 58PSI varied in size | 2.2 to 2.4 Bar to 4 Bar | 220 to 240 to 400 kpa | |
| Pickup Trucks | 35 to 40 PSI | 2.4 to 2.75 Bar | 240 to 275 kpa | |
| ATV | 4 to 8 PSI | 0.27 to 0.55 Bar | 27 to 55 kpa | Check details |
| UTV | 12 to 18 PSI | 0.82 to 1.24 Bar | 82 to 124 kpa | |
| Large Vehicles | Depend on size | Depend on size | Depend on size |
To make it more user friendly, all our tire inflators are set with regular Psi or bar for a quick start inflating.
But if your vehicle is special, it’s still the best way is to see the user manual for the specific tire pressure needed or just to contact the manufacturer.
