Getting ready to buy a set for the 2020 F350 CCSB, and looking for input. Will these tires rub without any lift, and about how much will it change the speedometer. Can I take my truck to the dealer and have it re-flashed for the larger tires?

 

I have them, they won’t rub. I used Forscan and changed them to the biggest 20” in there. They are still about 4% over.

 

Great tire. I had a set in an f150 and ran them across the jagged rocks of the Oregon high desert and in the muddy hills of eastern Oregon. No problems and the tread life was unreal. Only issue to note was that they pulled right but all my aggressive tires seem to be that way.

 

great tire, I had them on previous trucks and they were also well mannered while towing.

 

the right pull drove me nuts. awesome tire though

itll fit stock height.

 

When the dealer resets the tire size, can they also set the tranny shift points?

 

So, I should be getting my tires this next Friday, and was just checking to see if you're still happy with them. I had a set on my old F350, and really like the way the wear.

 

Yes I'm happy with them. They did get louder as they wore, but no where near MT loud. I have 30k on them and probably will get another 10, but I have only rotated them once or I think 50k might would be seeable.

 

No. According my dealer the software they have only adjusts for/to stock settings. I wanted to lower the TPMS lower limit because I like 50psi in the rear. They tried and but they don't even have the option. I asked about tire size while the tech was in it and they only have stock sizes to choose from and there are no other settings. You will need to get Forscan and do it yourself.

 

I did speak with a tech, and as you said, they only have stock sizes, but I think the 20" tires are really close, so I'll probably have him program those into my truck. Thanks for all of the input!

 

whats the down side of not adjusting for tire size? your speedometer is off a little ?

 

Yes, that's really the only thing that I can see!

 

Find someone with an Autel TS508 or better TPMS scanner. Run it as a 2018 and it should allow you to reset the TPMS set pressure. Forscan will do it with coding, but the TPMS tool is easier

 

That’s all it was on my ‘19 with the same size tires. I just used Rough Country’s Speedo Calibrator.

 

I'm running those now. The dealer told me the same thing others have said, but I would need a VIN from a truck that had stock 20's they said to do it. Even then it would have just been close and not exact. I just changed it myself with Forscan and now it's dead on. Changing to the right hex value did affect the shift points. I like it a whole lot better now than when I was running it with the speedo uncorrected.