How to Put Air in Tires Without Gauge

Eyeball Method
It is to check the car tire pressure by just watching it from a distance.

It is to check the car tire pressure by just watching it from a distance. For this purpose vehicle should be on a flat surface like road. After observing the tires from some distance experienced drivers can find the difference of air pressure in tires. However this method is considered riskier than all other methods. First, because it's difficult to observe a difference of 10 to 20 PSI. Second, some radial tires have slight bulge on the side walls of tire so can mislead the judgment. Some people try to inflate tire until bulge disappeared. But here is again a risk of over inflating and again facing a problem of putting right amount of air.

Hand Pressure

For this method of how to check tire pressure, heel of hand is used to push the tire hardly. The rule is if it feels like hitting a rock then there is plenty of air but if it feels like pushing back then there is low pressure. Now how to put air in tires? simple, put air until "feel like rock" level achieved.

Ride-Through-Mud Test

It sounds little funny and long but some people prefer it on eyeball test. For this test mud, ink or any other similar marking substance is applied on tires and then made a mark on ground by little movement of car (make sure to do it on flat surface like road or pavement). Then observe the trail made by tire. This observation will give a comparative result of how much a tire touch the surface. Trail of tire with less air will be different and smudged as compared to other tires. Put some air and test again until required level of car tire pressure is achieved.

Thumb Calibration

It is calibrating the thumb pressure on the good pressure tire and then use this feeling as a standard to check the tire with low pressure and fill low pressure tire. This method is similar to hand pressure.

Weight on the Wheels

Put maximum weight on the tires and tires with low pressure will deform 10 to 20 %. This is a noticeable deformation to give an idea of required air.

Pump-Strokes-Count Method

If anyone don't like to keep a gauge and use it then it's very easy method to answer the question of how to put air in tires without gauge. Make a count one time with a gauge and remember it to use as a standard. For example if 110 psi car tire pressure is required and it is achieved by 200 strokes of pump then one can use these 200 strokes as a standard to fill the tire every time. Please make sure to use this standard as long as vehicle, tires and pump remain the same. Otherwise u need to check again. One more thing to be careful about is what should be the level of air within the tire after which it is filled with 200 strokes of pump.