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Jeep Wrangler JK
JK General Discussion
Tire air pressure
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<blockquote data-quote="JerryD" data-source="post: 461025" data-attributes="member: 17662"><p>Chalk test is where you run a line of chalk across the tread of the tire and then drive and see where it wears. You want an even wear. If it wears off in the center more than at the edges, you're still over inflated.</p><p></p><p>I don't recall what the factory settings are, but the placard on your door will tell you what the Jeep thinks it should be at. And for whatever reason shops and tire places always seem to want to put in 40 PSI regardless of what the placard says. J scan or other devices just allow you to run at the quote unquote proper pressure for your vehicle. Without the nanny light coming on</p></blockquote><p></p>
[QUOTE="JerryD, post: 461025, member: 17662"] Chalk test is where you run a line of chalk across the tread of the tire and then drive and see where it wears. You want an even wear. If it wears off in the center more than at the edges, you're still over inflated. I don't recall what the factory settings are, but the placard on your door will tell you what the Jeep thinks it should be at. And for whatever reason shops and tire places always seem to want to put in 40 PSI regardless of what the placard says. J scan or other devices just allow you to run at the quote unquote proper pressure for your vehicle. Without the nanny light coming on [/QUOTE]
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Jeep Wrangler JK
JK General Discussion
Tire air pressure
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