50psi?? New LT265/60R18 BFG TA KO2 - Jeep Garage - Jeep Forum

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Old 08-21-2015, 09:43 PM
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50psi?? New LT265/60R18 BFG TA KO2

So I just dumped my Latitude stock "pretend AT" for tires that I can trust in off road conditions. Americas Tire says their computer is recommending 50 psi for my vehicle and tires. Does this make any since? I was always under the impression that the the factory recommended pressure would apply if I kept to the factory size and aspect ratio. To me, 50 psi is way too high. What are others running with their LT tires on the stock 18" rims?

By the way, these tires have transformed a tame CRD into a HC looking JGC.


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Old 08-21-2015, 10:20 PM
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Re: 50psi?? New LT265/60R18 BFG TA KO2

Go with what the door jamb says.
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Old 08-21-2015, 10:21 PM
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Re: 50psi?? New LT265/60R18 BFG TA KO2

And let us know what you think of the tires. I'm considering them in the same size on my Limited ECD ORAII.
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Old 08-21-2015, 11:44 PM
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Re: 50psi?? New LT265/60R18 BFG TA KO2

The rating on the door only works for the OEM tires or tires that are the same rating as the OEM. When you start changing to ATs, MTs and especially an LT rated tire your PSI requirements will change.
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Old 08-21-2015, 11:51 PM
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Re: 50psi?? New LT265/60R18 BFG TA KO2

For now, I lowered to 45psi which seems more reasonable and will see how that works. I would be curious to others experience. I am also looking forward to seeing what the air suspension feels like now with stiffer LT type tires. Maybe less like a Cadillac. Hehe


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Old 08-22-2015, 09:40 AM
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Re: 50psi?? New LT265/60R18 BFG TA KO2

Care to post pics? I'm trying to decide on keeping the 20" size or going down to 18's with KO2's.
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Old 08-22-2015, 09:48 AM
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You selected LT tires rather than P tires.

Size-for-size, LT metric tires require higher air pressure to carry equivalent loads. Therefore, you would expect to have substantially higher pressure than your door sticker indicates. You have also correctly noted that your LT tires are stiffer.
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Old 08-22-2015, 10:54 AM
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Re: 50psi?? New LT265/60R18 BFG TA KO2

If you want to know the correct tire pressure for the tires do what is the standard. Get white caulk or marker and put a line across the tread perpendicular to the rotation of the tire. Drive the Jeep straight ahead and get out and check to see the wear pattern. Once it wears evenly you have the correct tire pressure. This is what is still done to achieve the best contact patch and even wear pattern for any tire on any car. You are not guessing doing this you are dialing the tire pressure in.
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Old 08-22-2015, 12:16 PM
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Re: 50psi?? New LT265/60R18 BFG TA KO2

Quote:
Originally Posted by volvite View Post
The rating on the door only works for the OEM tires or tires that are the same rating as the OEM. When you start changing to ATs, MTs and especially an LT rated tire your PSI requirements will change.
I have the BFG TA KO1 LT versions and stock PSI felt sloppy (34 PSI?) so I think I filled to 36 PSI all around..gets up to 40 PSI on a summer day when fully warmed up. I think it's at a good level between ride comfort and performance. If I remember filling to stock PSI on a cold winter day had me only at 29 PSI on start up which too me felt under inflated, at 36 PSI during the winter I drop down to about 32/33 PSI on a cold day start up which felt more normal.
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Old 08-22-2015, 05:26 PM
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Re: 50psi?? New LT265/60R18 BFG TA KO2

36psi works well for the stock Michelins. I use that pressure even when towing.
So far, with 2 rotations and the third next week at 22500, the tires look really good with decent tread depth and even wear across all 4.
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Old 08-23-2015, 02:34 PM
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Re: 50psi?? New LT265/60R18 BFG TA KO2

I made the same change and am quite pleased. Roadkill has it correct and this concept is described on the BFG site though I do not remember the exact location. I contacted the BFG rep to get their recommended value and it took the them a day to get it from their engineer as the database had not been updated. 50 psi is the cold inflation value for this tire when switching from a P-metric. That said, I found 50psi to be too high in practice. It crowned the tire and gave skittish ride. Another hint might have been the tire pressure rise as a result of driving was only 1 psi though this is possibly suspect. I settled on 40psi... we'll see.
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Old 08-23-2015, 09:55 PM
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Re: 50psi?? New LT265/60R18 BFG TA KO2

Farfromovin...here are some pics with the AT KO2. They look awesome. I dropped to 40psi after feeling 45 was too skiddish on rough pavement. So far, I think 40psi feels perfect. Too soon to give any feedback on the performance. (no idea if images will post)


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