Thread: Do you use PSI or KPA for tyre pressures

Originally Posted by laney

I use psi as this is what I understand but use bar when wearing breathing apparatus I also prefer horse power over kilowatts and work my fuel average out in miles per gallon instead of litres per 100ks.

Same here, except for the breathing apparatus. Psi, Bhp and mpg.. but I’m old ;-)

When I was selling trucks and plant, no one used kilowatts or Newton Metres. Kilowatts were for light bulbs. Horsepower and ft/lbs were what was understood in regard to engines. Pressure was always PSI and still is to most people I am in contact with. Machinists may use metric machine tools and metric drawings but they still express tolerances in thous.

Wheels and tyre diameter are inches therefore pressure is psi.

Metric is used for everything else.

Originally Posted by Geedublya

Wheels and tyre diameter are inches therefore pressure is psi.

Metric is used for everything else.

Umm not quite.
Most tyres are metric width/ aspect percentage of metric width / imperial wheel fitment .
Then metric load ratings.

Nothing really consistent.

Originally Posted by Bigbjorn

When I was selling trucks and plant, no one used kilowatts or Newton Metres. Kilowatts were for light bulbs. Horsepower and ft/lbs were what was understood in regard to engines. Pressure was always PSI and still is to most people I am in contact with. Machinists may use metric machine tools and metric drawings but they still express tolerances in thous.

I that case they’re working to big tolerances by today’s standards

I use psi in this country used to use bar in the old country. As a funny aside I knew a carpenter that would use the dual cm/inches on a tape measure so would say things like "2metres and 5 inches"! Whatever lined up on his tape measure.

Originally Posted by trout1105

It just goes to show that Gold is heavier than Butter

so, a kilo of gold is heavier than a kilo of butter?

One troy ounce is 1.09714286oz.
So Yes an ounce of gold is heavier than an ounce of butter