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Old 11-12-2014, 05:31 PM   #21
JRTJH
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When I was in college I worked as a porter at a car dealership. One of my jobs when prepping cars for a test drive was to let air out of the tires to 24PSI. At the time, most tires were being run at 30-32 PSI. The soft tires really made a "mid size Torino" ride as smooth as a "full size Galaxy 500". Then when bought, we'd air the tires to factory specs and almost always had complaints asking, "What did you do to my car? It rides so rough." That was during the "heyday" of bias ply tires.

When I bought my current F250, the first thing I did before the test drive was check tire pressures. Rear tires were aired to 40 PSI and fronts were 50 PSI. That would surely have helped it ride like a half ton, but after airing the tires, it rode like a truck should.
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2015 F250 6.7l 4x4
2014 Cougar X Lite 27RKS
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Old 11-13-2014, 12:14 PM   #22
sourdough
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JRTJH

When I bought my 250 I drove it and told the guy I knew the ride would be rough but never dreamed it would be that rough. I came back for another drive and took an air gauge. Front and rear tires were aired to 108-110 psi!! I aired it down to factory spec of 65psi front/80psi rear and it rode better...not good, but better. I now try to run about 55psi unless towing. It IS better then.
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