hot and cold tyre pressure?

[JEWIENEWIE]

I did a run ap the beach yesterday and as normal dropped tyre pressure to 20psi before hitting the beach. Had a quick fish with no luck so headed home via the servo to put air back in tyres. I did this, putting them back to the recomended pressure of 50psi. This morning i rechecked tyre pressure to find them about 10psi under what they were at the servo. This has happened various times whcih got me scratching my head. Will i get a diff tyre press reading from cold to hot tyres and if so what is the diff roughly.
Jewie

[Roughasguts]

Think the diff is from a cold morning in winter to a running tyre in summer, the differance is you will read 2 PSI higher in summer.

So if left at 30 psi in winter it would read 32 psi warmed up in summer.

But did you check your tyre pressures at the same servo the next day?

[gone_fishing]

make sure you use the same guage buyyourself a good guage to keep in your car that will give a constant variable servo guages are never calibrated once drop never acurate
you will always get a difference between hot and cold temps and the differnce will vary depending how your tyres are inflated eg low inflation pressure the greater the temp diff
im lead to believe that for road use you should check your tyres cold then again when hot
a differnce of less than 4psi means your tyres are at the correct psi for the wieght of your vechile
in sure i be corrected if wrong
as a experiment check you pressures when hot before you let them down for beach work then reset them at that pressure then recheck cold and imsure after a couple of trips you get the re inflation pressure close to not having to race to the servo in the morning before work
cheers

[tinniemad]

yea guages are far and few between! most are different

[caloundra]

google ' 4psi rule' and have a read. some say 6 psi for 4wd's

[JEWIENEWIE]

Thanks guys, thought i had been indulging to much!!
Jewie