0REDSOX7
Member
- First Name
- Daniel
- Joined
- Apr 20, 2022
- Threads
- 3
- Messages
- 21
- Reaction score
- 15
- Location
- Wilmington, NC
- Vehicle(s)
- 2022 Jeep Gladiator Overland
- Thread starter
- #1
Hi all!
I will preface this with "please don't laugh at me, I am trying to learn..."
On Friday, I upgraded the tires on my 2022 JT Overland from the stock 255/70R18 Bridgestone Dueler H/T 685 to 275/65R18 Falken Wildpeak AT/3. I got the SL load category (same as what was on there).
The tricky part is determining what the tire pressure should now be. The sticker on the door of my JT says cold tire pressure should be 38 Front and 38 Rear. I know that will be too high for these new tires. The receipt from Discount Tire says their calculation should now be 36 PSI, which is where they were. This holds true when you use the Discount Tire "Determining Air Pressure - Load Index Table" going from a 113T to a 116T Standard Load tire.
This evening, after sitting in the garage all day...I decided to do the chalk test.
I started at 36 PSI and got all the way down to 30 PSI on the front before I got uniform even wear. In fact, the rear tires could probably go down a few more PSI, but, assuming I ever carry weight in the back, I'd have issues with a lower tire pressure. 36 PSI vs 30 PSI is quite the difference...
So, with that said, what is correct? The chalk test or the PSI based on the load index?? I am not going to lie, 30 PSI in the front looks as if the tire is a bit "low" on air, but, who knows...
Thoughts here?
Thank you.
I will preface this with "please don't laugh at me, I am trying to learn..."
On Friday, I upgraded the tires on my 2022 JT Overland from the stock 255/70R18 Bridgestone Dueler H/T 685 to 275/65R18 Falken Wildpeak AT/3. I got the SL load category (same as what was on there).
The tricky part is determining what the tire pressure should now be. The sticker on the door of my JT says cold tire pressure should be 38 Front and 38 Rear. I know that will be too high for these new tires. The receipt from Discount Tire says their calculation should now be 36 PSI, which is where they were. This holds true when you use the Discount Tire "Determining Air Pressure - Load Index Table" going from a 113T to a 116T Standard Load tire.
This evening, after sitting in the garage all day...I decided to do the chalk test.
I started at 36 PSI and got all the way down to 30 PSI on the front before I got uniform even wear. In fact, the rear tires could probably go down a few more PSI, but, assuming I ever carry weight in the back, I'd have issues with a lower tire pressure. 36 PSI vs 30 PSI is quite the difference...
So, with that said, what is correct? The chalk test or the PSI based on the load index?? I am not going to lie, 30 PSI in the front looks as if the tire is a bit "low" on air, but, who knows...
Thoughts here?
Thank you.
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