outside of tire wearing fatser than inside? - Ford Powerstroke Diesel Forum
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Old 08-26-2010, 10:47 AM
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outside of tire wearing fatser than inside?

i installed a 7" icon lift and a set of 37 12.5 17 bfg km2s. i installed the alignment cams and let everything setle for a few days, then i took it to a very reputable chassis shop and had it aligned. after driving about 1000 miles i noticed that the nipples are missing off the outside of the front tires and not the inside. i took it back to the alignmnet shop and they said it was spot on and all parts were good. he suggested that it may be from when i make turns, but why only the outside? the tires are on a 6.5" rim and have a nice flat footprint. i just dont feel like replacing a $300 tires because i f'ed them up. its not wearing the tread but obviously its hitting more out then in becaus eof the nipples. is this normal? any suggestions? thanks
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Old 08-26-2010, 10:52 AM
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If you lift it you are going to have a higher center of gravity and more body roll. This explains his turning theory. You might have to rotate every 5000 miles to keep those tires looking good.
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Old 08-26-2010, 01:50 PM
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Is this happening on all 4, just the fronts, just the backs?
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Old 08-26-2010, 08:06 PM
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i believed the tech as this place is very good i just didnt understand. now that you mention the center of gravity being higher it make sense
sorry i should have specified, its just the fronts
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Old 08-26-2010, 08:39 PM
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could it be a tire pressure issue? Have you done a chalk test?

Checking Tire Pressure - Determine Correct Pressure
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Old 08-26-2010, 08:48 PM
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i thought about that but im running 45 in each and it looks pretty good. also if it were tire pressure wouldnt it wear on both sides? i believe the chassis shop did a chalk test because when i picked it up i had blue lines on the tires.
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Old 08-26-2010, 08:50 PM
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yeah would be wearing on both edges of the tires, from low pressure, or wearing in the center for too much pressure. I know what it is....you need my 4-link!!
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Old 08-26-2010, 09:37 PM
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when body roll occurs, it pushes on the outside tire which make it wear more on the outside of that tire but the inside tire doesnt really roll enough ot do anything because the weight is now off this tire. shouldnt put too much more wear on the tires but definately rotate them often
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Old 08-27-2010, 03:47 AM
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If this is just happening to the fronts I say you have the fronts toed in too much. Run the at 0 toe and see if that doesn't help. It may tend to wander just a touch more but I really bet that is where your problem lies.

With the tires toed in you will wear the outer edge.
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Old 08-27-2010, 04:11 AM
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Those 6.5" rims do not seem wide enough for that 12.5" tire. Any chance that the side wall is rolling under when you corner?
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