Fuel Off-road Flame & Wildpeak at4w 275/60r20

[Indaram]

I just put on a new set of wheels and tires. Went with Fuel Off-road Flame wheels 20x9 +1mm and Falken Wildpeak at4w 275/60r20 tires. Notice my Speedo was off (low) about 2mph at 65mph. I know default setting for my 275/55r20 was 2462mm in AlfaOBD, and after a few test settings I locked it in at 2550mm and now it's perfect. I tested at 65, 75, and 80mph using a GPS speedometer and matches perfectly.

So far I love the new setup. Wheels look great and tires ride smooth, virtually no road noise with radio off, and so far I'm not noticing or feeling any rubbing (no lift or level yet). Need to drive on them a lot more to give any feedback on mpg loss if any.

Question I have is, should I run these tires at same 39 psi or bump up a bit? Max tire psi is 51. Shop inflated them to 46 psi but I felt it was too high so dropped them to 40psi for now.

Now sitting and having a beer while my alignment is being done.

Thanks!

 

[Indaram]

And now I need help... Entered in new tire size and now in the stored messages section it says "Auto emergency breaking turned off". Anyone know how to fix this?

EDIT: ok so when you change your tire size it turns that off. All you need to do is go into the vehicle settings on the radio, then safety & driving assistance. Then automatic emergency breaking. Turn the setting to off, then exit out. Go back in and turn it on. Fixed and my Speedo is reading right and no dash lights whooo!

 

[Indaram]

Photos of the wheels and tires on the truck!

 

[Boxmannn]

Beautiful set up. I just put the same exact same tires (275 60 R20) on my truck this past week but kept the stock Big Horn rims for now. I had a little rubbing at full lock but zip tied the inner liners to fix it.

I was wondering about air pressure as well. I tried 40 psi. but felt it was too high so I called Falken directly and they said that if I wanted to match the load rating on the door jamb (which is the most important number for safety) I could run them as low as 34 psi. However they also made sure to mention that for legal purposes they could only “officially” recommend 36 psi because thats what is on the door sticker. They also have a load rating/psi chart on their website if your interested.

Now to adjust the speedometer with AlfaOBD. This makes me a little nervous but I’m going to try it just need to find the instructions for a 2020 model year.

 

[CHeYeNNe71]

Looks great!! Glad to hear about the AT4W. I have a set eventually getting installed on mine, once I install the lift and figure out if I'm going to leave the wheels I picked up, or PC them.

As far as PSI, look into the chalk test.

I've also seen this, but not sure how reliable it is.

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

 

[H2OMAN]

Your truck is very sharp my man. They look so clean without flares.