Air Pressure in 255's

[SOAZ]

I didn't do any chalk, but if I'm about to do a long road trip I usually put them up to 40 or so. I seem to get better mileage out of them on the highway... even if I'm wearing the center too much.
Is this sound logic if one is okay with the rougher ride? I'm always looking to get the best mileage on the pavement. All bets are off when I'm offroad, I understand mileage will be horrible then. :arabia:

 

[Willman]

When I get home I'll try to do the "chalk" test but at this time of year the challenge becomes finding a dry parking lot or road. Everything is covered in snow or ice at the moment.

I've got them set at 36 psi for now and will do a bit of testing when I get home. I've read about anohter method of verifying that you have the correct pressure. I can't find the post right now, but it was roughly as follows.

1. Set and record tire pressure when cold (i.e. 30 psi)
2. Go for a minimum 5 minute drive to warm up the tire.
3. Re-measure pressure. It should be less than 5% over your original value (i.e. 1.5 psi for a starting value of 30 psi as per above example). Here is the catch, if the pressure was more than 5% greater you need to inflate your tires a bit more.
4. Repeat this process untill the difference between hot and cold is less than 5%

The theory is that if you tires are under inflated they heat up causing the pressure to increase. Anything over a 5% increase is too much. Some tire design engineer had written this up. I'll see if I can find the post or link later.

Cheers,
P

Maybe i missed this......P........What brand did you get?

:chowtime:


Oh......and gotta see pictures!

 

[p1michaud]

Maybe i missed this......P........What brand did you get?

:chowtime:


Oh......and gotta see pictures!

Right here my friend: The Canuck Truck buildup!.