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Hey everyone,

I'm effin excited, I just had my new OL Bronze R716 wheels delivered and they will be off to the tire guy by the end of the week. I got the 8.5 width and will get 245/40R18 Conti. ExtremeContact Sports. I have a set of studdless winters on the Rado Gray Snowflakes that I run at the recommended pressures with no issues.
I've reached out to Continental and Ford for recommended pressure and both would not commit to even a suggestion (not surprising from a liability standpoint).
Question:
I understand there are personal preferences out there. However, would anyone running a 245/40R18 on an 8.5 width for some time recommend a good middle of the road pressure for me to start with? Thanks in advance

Pics to come!

-G
 

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I'm running that size tire on a 8 1/2 inch wheel. I'm running 36 pounds just like it says on the door panel in the car.
 

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Congrats on the new wheel and tire set-up! Be sure to share some images once you have the new assemblies bolted-up.

As you noted, pressure tends to be a personal preference, however, tires are pneumatic so you need to be aware of the minimal safe "cold" inflation pressure.

Your O.E. tires (95 load index - XL construction) carry 1,346 lbs per tire at the placard pressure (36 PSI) so your new 245/40R-18 ExtremeContact Sport tires (97 load index - XL construction) need to have the cold inflation pressure set to meet that 1,346 lbs. Using the load inflation tables, 34 PSI is the minimum cold inflation pressure your Extreme Contact Sport tires need to be set at to meet this load requirement.

My recommendation is to set the pressure at 36 PSI and adjust to your liking from there. Just be sure not to go below 34 PSI cold and to not over inflate the tires past the maximum pressure as indicated on the sidewall.
 
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