I know it's been said before, but should you check tire pressure when the tires are cold, or if they're warm after driving?

Thanks

 

Check when cold...preferably first thing in the morning...and if you need more air don't drive anywhere greater than 1 mile because
you will get a false air pressure reading...also hope you have a GOOD tire pressure gauge (it's a cheap investment).

 

I was told the temperature difference is near-negligible? I check mine when's cold but have not compared back to back cold/hot readings.

 

What Georgia Moon said........he's spot on right! And, don't trust(unless in an emergency) the 'pencil-type' gauges. They are notorious for being off. A good gauge will cost somewhere around $25-30.

The proper psi(32#. cold) will give you more tire 'life'(my original F1s lasted for 42,300 miles) and better mpg gas-wise as well as proper handling characteristics.

Dan

 

cyntaxx:

"I was told the temperature difference is near-negligible?"

The difference can be significant...try this...check your tires
dead cold in the am with a good gauge (as LIGHTNINGROD stated)...drive 10-20 miles...check your tire pressure again...you will see a serious difference...also any consistant outside temperature elevations up or down will effect tire pressure...this is why tire pressure is really effected by seasonal changes...also in my opinion, tire balancing should only be done after the tires are really warmed up (15-30 minutes of driving)...this way your tire rubber is at fairly normal operating temperatures...therefore
a more accurate balance is achieved.

LIGHTNINROD:

42,300 miles on your f1's...thats got to be a record!