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  #25  
Old 09-16-2015, 08:06 AM
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Re: 50psi?? New LT265/60R18 BFG TA KO2

Many WK2s with P265-60R18s have placards that recommend 36 psi, discussed in Suspension/Driveline/Brakes/Wheels/Tires section here -> Michelin Latitude Tire Pressure

I'm at 55 now but considering a drop to 45.

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  #26  
Old 09-17-2015, 12:12 AM
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Re: 50psi?? New LT265/60R18 BFG TA KO2

45 works well.
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  #27  
Old 12-24-2015, 02:21 PM
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Re: 50psi?? New LT265/60R18 BFG TA KO2

Contacted BFG and got the following response. I am following up because the person thinks I am changing tire SIZE, which is not the case. The size is the same (265/60R18), but the rating changes from P to LT.

+


12/24/2015

Hello Jim,

Thank you for your email. We welcome the opportunity to serve you.

In regards to the email you sent stating:
---------------------------------------------------------------------
What is the recommended tire pressure from BFG for the All-Terrain T/A KO2 for on a 2011 Jeep Grand Cherokee 4x4? Jeep recommends 33 PSI cold for normal on/off road driving for the stock P-rated 265/60R18 tires. On-line Jeep forums about this tire recommendations vary widely. What is your recommendation for these LT-rated LT265/60R18/E 119 S (Part Number 63681)?

---------------------------------------------------------------------

When installing a different size than the original equipment tire, all vehicle manufacturer specifications must be maintained. The replacement tire should be inflated to provide the same load capability of the original tire size at the manufacturer’s recommended pressure.

The original equipment tire size for your 2011 Jeep Grand Cherokee Overland is 33 psi cold. At 32 psi cold, the tire supports 2,183 pounds per tire and at 35 psi cold the tire supports 2,271 pounds per tire.
Jim, when you changed the tire size from a P-Metric tire to a LT (light truck) tire size LT265/70R18, the new inflation will be 55 psi cold which supports 2,330 pounds per tire. At 50 psi cold, the tire will support 2,205 pounds per tire.

If you have any further questions or concerns, please contact us.

We appreciate your business and thank you for choosing BFGoodrich.

Sincerely,

Sue
Consumer Care Department
Certified BFGoodrich Product Expert
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  #28  
Old 12-24-2015, 02:43 PM
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Re: 50psi?? New LT265/60R18 BFG TA KO2

I'm running 38psi front and 36 rear on my KO2s. 2014 EcoDiesel 4x4


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  #29  
Old 12-24-2015, 03:42 PM
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Re: 50psi?? New LT265/60R18 BFG TA KO2

Quote:
Originally Posted by WK2 Rover View Post
Contacted BFG and got the following response. I am following up because the person thinks I am changing tire SIZE, which is not the case. The size is the same (265/60R18), but the rating changes from P to LT.

+


12/24/2015

Hello Jim,

Thank you for your email. We welcome the opportunity to serve you.

In regards to the email you sent stating:
---------------------------------------------------------------------
What is the recommended tire pressure from BFG for the All-Terrain T/A KO2 for on a 2011 Jeep Grand Cherokee 4x4? Jeep recommends 33 PSI cold for normal on/off road driving for the stock P-rated 265/60R18 tires. On-line Jeep forums about this tire recommendations vary widely. What is your recommendation for these LT-rated LT265/60R18/E 119 S (Part Number 63681)?

---------------------------------------------------------------------

When installing a different size than the original equipment tire, all vehicle manufacturer specifications must be maintained. The replacement tire should be inflated to provide the same load capability of the original tire size at the manufacturer’s recommended pressure.

The original equipment tire size for your 2011 Jeep Grand Cherokee Overland is 33 psi cold. At 32 psi cold, the tire supports 2,183 pounds per tire and at 35 psi cold the tire supports 2,271 pounds per tire.
Jim, when you changed the tire size from a P-Metric tire to a LT (light truck) tire size LT265/70R18, the new inflation will be 55 psi cold which supports 2,330 pounds per tire. At 50 psi cold, the tire will support 2,205 pounds per tire.

If you have any further questions or concerns, please contact us.

We appreciate your business and thank you for choosing BFGoodrich.

Sincerely,

Sue
Consumer Care Department
Certified BFGoodrich Product Expert
+

Doing my own math for 265/60R18 tires:

Latitude Tour
2271 max load @ 44 PSI max
= 1703 load @ 33 PSI

BFG All-Terrain T/A KO2
3000 max load @ 80 PSI max
= 1703 load @ 45 PSI

Note that 1703.25 pounds times 4 tires = 6813 pounds. The GVWR for my vehicle is 6800 pounds.
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  #30  
Old 12-26-2015, 09:27 PM
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Re: 50psi?? New LT265/60R18 BFG TA KO2

I have been at 38 psi for about 5000 miles. At highway speeds it gets to about 44. It sure feels stiff when I hit bumps and I wonder if it is safe for rain or snow.

Anyone have any scary hydroplane experience?

I just came from Durango CO and I aired down to be sure.
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  #31  
Old 12-27-2015, 07:46 PM
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In general, I like to run my tires at high pressure for fuel efficiency; however, in the winter I'm willing to sacrifice efficiency for additional traction and I air down to standard pressures.
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  #32  
Old 01-03-2016, 09:16 PM
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Re: 50psi?? New LT265/60R18 BFG TA KO2

Quote:
Originally Posted by WK2 Rover View Post
+

Doing my own math for 265/60R18 tires:

Latitude Tour
2271 max load @ 44 PSI max
= 1703 load @ 33 PSI

BFG All-Terrain T/A KO2
3000 max load @ 80 PSI max
= 1703 load @ 45 PSI

Note that 1703.25 pounds times 4 tires = 6813 pounds. The GVWR for my vehicle is 6800 pounds.

BFG didn't want to discuss the math and referred me to the load tables again. Fortunately someone provided a link to them above!

Based on the tables the proper inflation would be 50 PSI. I will try 45 to 50 PSI range until it feels right.


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  #33  
Old 01-04-2016, 05:36 AM
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Re: 50psi?? New LT265/60R18 BFG TA KO2

50psi get a kidney belt whilst you are going. Ran light truck tyres for a number of years, normally driving never run higher than 36 cold, when hot raise to about 39/40.


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  #34  
Old 01-04-2016, 08:49 AM
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Re: 50psi?? New LT265/60R18 BFG TA KO2

I concur with our brethren from the land of Oz - @ 50psi you're going to feel every expansion joint, every contact patch, pot hole and corrugation the road has to offer. Computationally 50psi/3.44 bars looks great on paper, but the weak link in the chain is the fragile human inside the Jeep.


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  #35  
Old 01-06-2016, 02:31 PM
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Re: 50psi?? New LT265/60R18 BFG TA KO2

Not the same tires or size...but....had 42 in GY Adventure ATs.......awful in the snow......dropped to 34 and traction was drastically improved.
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  #36  
Old 02-21-2016, 10:10 PM
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Re: 50psi?? New LT265/60R18 BFG TA KO2

I'm running 285/55/20 KO2 @ 44psi, appears to be the sweet spot....max on these is 65psi.
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