A few more questions for now

[7six2]

Thanks for putting up with my noobness.

1) Regarding the load range on tires…I know that my OEM tires are rated as “C”; but the tires I want are rated as “E”. I’ve never worried about this on a ½ pick-up but how critical would it be on my ’19 Raptor? And what would be consequences of using a D or E rated tire? Specifically I want to go with the Nitto Trail Grapplers. I went through three sets on my previous truck and loved them.

2) Is it possible, perhaps with Forscan, to calibrate my TPMS psi readings? It seems that each sensor is off by 2 psi.

3) Can I use Forscan to lower the threshold that activates the low tire pressure warning?

 

[jzweedyk]

1. As you go up in ratings the sidewalls become stiffer to handle additional weight and air pressure. I had 40" C range that unmounted you could push down with your hand, and I had 38" E rated that unmounted you could sit on without them going down. You can compensate a little by lowering the pressure, but with stiffer sidewalls they will ride rougher. One of the reasons Ford chose these tires is because BFG made them for the Raptor in C range so the ride would be better. Most large tires (like 40's for rock crawling) are C rated so they can wrap around rocks better to grip better off road. Most "truck" tires are E range to handle the higher pressures and higher load ratings.

2 & 3 someone else can answer, as I have not gotten into Forscan.

 

[realjones88]

2) Haven't done this process myself, but check out

3) Yes, you convert the PSI you want to hex and use that as the new value. BCM 726-40-01

 

[7six2]

2) Haven't done this process myself, but check out

3) Yes, you convert the PSI you want to hex and use that as the new value. BCM 726-40-01

Awesome. Thanks!

 

[wheelman55]

This procedure does not calibrate the sensors. Rather it matches up the position of a wheel with TPMS to it’s position on the screen.

My 2018 Raptor does this automatically. Meaning after a tire rotation, the truck recognizes which TPMS is now on which corner. I do a six tire rotation and the truck relearns each time.

 

[7six2]

This procedure does not calibrate the sensors. Rather it matches up the position of a wheel with TPMS to it’s position on the screen.

My 2018 Raptor does this automatically. Meaning after a tire rotation, the truck recognizes which TPMS is now on which corner. I do a six tire rotation and the truck relearns each time.

Ahh OK...I was going to take a closer look today but now I see your right. At least I know that I can change the threshold value for the low pressure alarm.

 

[MEATSWORD]

https://forscan.org/forum/viewtopic.php?t=8613

3rd post down has the spreadsheet. Should have the values you are looking for

 

[rtmozingo]

Thanks for putting up with my noobness.

1) Regarding the load range on tires…I know that my OEM tires are rated as “C”; but the tires I want are rated as “E”. I’ve never worried about this on a ½ pick-up but how critical would it be on my ’19 Raptor? And what would be consequences of using a D or E rated tire? Specifically I want to go with the Nitto Trail Grapplers. I went through three sets on my previous truck and loved them.

2) Is it possible, perhaps with Forscan, to calibrate my TPMS psi readings? It seems that each sensor is off by 2 psi.

3) Can I use Forscan to lower the threshold that activates the low tire pressure warning?

1) I went up to load range D and there's a noticeable different in firmness. Not bad, and more different than worse, but going up to E will definitely make for a more unpleasant ride.

2) There's a way to do this I believe, but I'd have to dig in my shop manual to tell you for sure. It may be in FORSCAN, but I don't recall seeing it.

3) Yes, I recently did it. You alter the door placard recommendation (default 38). I went 32/30, and while I've not aired down since the change, I've not had any low tire warnings when I normally got one around 30 lbs previously.

 

[Loufish]

Check the sidewall of the BFG "C" range tires...theres plenty of load rating for our trucks....I've been running 1/2 ton off road trucks since the late seventies (...yeah I know...I'm the old guy ) and never ran a tire higher then a "D" load rating. "E" ratings on most off road 1/2 trucks ride rough, and don't flex as good which doesn't help with rock crawling and sand...