KO3's!!!

[msenske]

Based on all the feedback from this thread, I increased my tire pressure on my 265/70R18 124S RWL KO3s from 38psi to 46psi. I spoke with a BFG representative as well as referenced the tire pressure calculator mentioned in this thread, and both helped me land on 45-46psi. So far the ride is great, with cornering being much improved. I haven’t driven enough to see what, if any, impact this change has made to fuel efficiency. Thank to everyone for the exchange of information and the thoughtful discussion!

 

[msenske]

Not sure if anyone has posted the BF Goodrich Load & Inflation tables yet as the thread has quite a few posts, but here they are in the event that someone needs them. The Light Truck Load & Inflation Tables begin on page 24 of 30 in the document and the specific reference to the KO3 in the OEM size of LT265/70R18 124S is on page 26 of 30.

 

[Buckfever]

So cold they're at 46 PSI this morning and hot the rear left needed a little air. Surprisingly it doesn't feel as bad driving this morning even over the tracks. I think maybe coming from the SL tire to the LT tire that was just the initial impression. And as was mentioned by @msenke the steering is tighter. We will see what happens with the MPG after some time. Thing is my comfort has definitely increased with this vehicle so I am driving with a good bit more enthusiasm and that can't help any,

 

[Buckfever]

“Thanks for contacting the BFGoodrich Consumer Care Team.

We would recommend using 45 PSI for these tires”

Response from BFG.

 

[Buckfever]

And for some reason now this calculator also gives the 45 psi recommended by BFG.

Tire Pressure Calculator

Easy to use tire pressure calculator. Use our tire pressure calculator to calculate the new tire pressure needed when changing tire sizes.

tiresize.com

 

[Buckfever]

We are now down to 20.3 mpg. I can't seem to get myself to stop running at 84mph on the highway.

 

[Buckfever]

Interesting tidbit, it's colder here so the cold PSI in the morning is at 44PSI.
So it got me wondering, turns out the industry standard is that the cold PSI is at an ambient temperature of 68F or 20C.

I didn't know.

 

[Buckfever]

Down to 20.2 MPG. I am driving at higher speeds as I am much more comfortable with the vehicle. so that is a factor, but I would say that you're going to lose some with these tires as they are a good bit heavier. I'll keep reporting and see what the total drop is. Drove off the lot at 20.6 MPG when I had the tires changed out so a .4 drop so far.

I really like the character of the vehicle with these tires and depending on the snow performance I may be done.

The only thing I would say is for sure go for a snowflake rated off road tire, BUT if MPG is a priority, maybe consider a non LT tire for the savings in weight.

Someone here put LT285 65 R18 on the stock rims. Honestly that probably would have been my preference however the spec sheet on the KO3's state the minimum rim width is 8" and the stock rims are 7.5" so I didn't want to push it. Those tires though are a good bit heavier so you'll lose even more. That said the stock size looks pretty damned good.