Front end allignment

[0533]

Uh...Ray....Aren't we supposed to put the required pressure in the tires before we drive? If it is cold in the morning it sounds like you allow low pressure in the hopes your tires warm up and reach the required pressure.

Jon, what you have just stated above is more important info than tire size and tire availability and raises some interesting questions.

OAT has always been an interesting factor in the decision to add/reduce air pressure or wait until the temps rise.

I use the following theory when considering adding air. I call it the "HomePort" approach. Example: In So. Florida the average temps are about 75 to 80º in the winter months by 2 pm.. I check my air around this time (before driving) and allow some difference for the sunny side of the bus.

Here is the big question: It has been colder here now with the addition of cold fronts coming down from CA, (relative terms for you Northern Boys) 50's in the morning. Rising to 80's by 2 pm.

I Had to take the bus to the Fort lauderdale Boatshow last week, before heading out I checked the air pressure, the OAT was around 65º and the tire pressure was about 5lbs low all around. I had checked them the week before and the air pressure was perfect all around, and the OAT was 80º (baseline OAT for So. Florida) so I decided that by the time I got up to speed on the road and by 12 noon I would see proper air pressure again. ( Here is an added question, The tire gauge was also very cold, metal was ice cold can this affect the result)

Yesterday around 2 PM I took the bus for a ride to the Fort Pierce Pilot Fuel plaza at exit 129 off 95. (fuel price $2.98 P/G) Checked the tires before leaving, all pressure is where it should be based on Michelin specs and bus weight, OAT was 82º. I have not added air for a very long time to any position on these tires since I have been back in So. Florida.

What I am hearing from you is that if one sees lower air pressure no matter what the outside temps, no matter where you are you should add/reduce air pressure to get the air pressure back to specs before driving off ???

I did however readjust the pressure for each region of the country, New England in the summer has cool nights and warmer days and average temps are 70's in the summer about 10º lower than Florida winter, I add air while in these climates. I add air if I see a difference over several days of checking, (subject to a huge change) check air everyday before driving) On the road for the summer 8K miles of driving across the East coast.

I have always been careful about checking air (comes from flying I guess) but I do not want to be a slave to the changing OAT on a daily basis and adding and reducing air pressure every few days unless I am spending some period time in the changing environment, lower temps etc.

What is the answer Jon???