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Old 10-26-2010, 12:21 PM   #8 (permalink)
bestclimb
Smeghead
 
Join Date: Oct 2009
Location: South Central AK
Posts: 933

escort - '99 ford escort sport
90 day: 42.38 mpg (US)

scoobaru - '02 Subaru Forester s
90 day: 28.65 mpg (US)
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my tires are rated at 50psi and I have them at 55 psi after a 5 mile drive to the station. I will be dropping them back down into the 40s soon though as I get some wicked wheel hop in the ice and snow.

I have had soft winter tires for a whole year now (used them in the summer) Other than some very rapid wear due to a very bad alignment issue they have worn flat across.

One thing tire manufacturers have to contend with is varying speeds traveled. The faster the car goes the higher the temperature of the tire. They calculate the increase in pressure for a vehicle at the max weight of the tire traveling at the speed rating of the tire.
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