How far can I air down?
03-13-2019, 03:22 PM
#1
Member
Thread Starter
How far can I air down?
Hey guys,
I bought a 2007 XLT 4x4 SuperCab with the 6.5' bed over the summer. The truck has a set of Toyo Open Country A/T II tires in size LT265/70R17 on it. These are E rated tires and are rated up to 80psi. I've been running them at 35 psi for normal driving conditions.
The tires are rated at 3195 lbs. at 80 psi. The truck weighs ~5800 lbs. Doing the math it looks like I'm in the right range.
5600 / (4 * 3195) /80 = 35.05
My question is if I'm off roading and keeping the speeds below 35mph how far can I air them down?
Thanks,
Chris
I bought a 2007 XLT 4x4 SuperCab with the 6.5' bed over the summer. The truck has a set of Toyo Open Country A/T II tires in size LT265/70R17 on it. These are E rated tires and are rated up to 80psi. I've been running them at 35 psi for normal driving conditions.
The tires are rated at 3195 lbs. at 80 psi. The truck weighs ~5800 lbs. Doing the math it looks like I'm in the right range.
5600 / (4 * 3195) /80 = 35.05
My question is if I'm off roading and keeping the speeds below 35mph how far can I air them down?
Thanks,
Chris
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ChrisAttebery (03-13-2019)
03-13-2019, 06:26 PM
#3
Senior Member
Hey guys,
I bought a 2007 XLT 4x4 SuperCab with the 6.5' bed over the summer. The truck has a set of Toyo Open Country A/T II tires in size LT265/70R17 on it. These are E rated tires and are rated up to 80psi. I've been running them at 35 psi for normal driving conditions.
The tires are rated at 3195 lbs. at 80 psi. The truck weighs ~5800 lbs. Doing the math it looks like I'm in the right range.
5600 / (4 * 3195) /80 = 35.05
My question is if I'm off roading and keeping the speeds below 35mph how far can I air them down?
Thanks,
Chris
I bought a 2007 XLT 4x4 SuperCab with the 6.5' bed over the summer. The truck has a set of Toyo Open Country A/T II tires in size LT265/70R17 on it. These are E rated tires and are rated up to 80psi. I've been running them at 35 psi for normal driving conditions.
The tires are rated at 3195 lbs. at 80 psi. The truck weighs ~5800 lbs. Doing the math it looks like I'm in the right range.
5600 / (4 * 3195) /80 = 35.05
My question is if I'm off roading and keeping the speeds below 35mph how far can I air them down?
Thanks,
Chris
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ChrisAttebery (03-13-2019)
03-13-2019, 06:43 PM
#4
Super Duper Senior Member
I have never aired down unless I was rock climbing. When I did, I always stayed around 22psi.
03-13-2019, 09:12 PM
#5
Senior Member
I air down to 15psi regularly to run on the beach, but I am not doing near 35mph either on varying terrain . I believe under 12psi is where you have to start worrying about breaking the beads loose.
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ChrisAttebery (03-19-2019)
03-13-2019, 11:29 PM
#6
Senior Member
What width wheels? The narrower the wheel, the Lower you can go.
20 psi is barely airing down for offroad. On my 2012 with 285/70/17s and 8.5" wide wheels, I air to 15 for the beach if I there is a good air up station very close by. If I'll need to drive a bit too air up, I go to 20 psi.
My Jeep has 35x12.50x15s in 15x8s. I adore down to about 15 psi on the beach and 8-10 for wheeling. I'll probably play around with more single digits at the beach this year. It's got OBA, so I'm not worried if I pop a bead.
This is the 35 on my Jeep at ~10 lbs
This is my brother's jeep, 32x11.50 on a 15x8 at 10 psi
20 psi is barely airing down for offroad. On my 2012 with 285/70/17s and 8.5" wide wheels, I air to 15 for the beach if I there is a good air up station very close by. If I'll need to drive a bit too air up, I go to 20 psi.
My Jeep has 35x12.50x15s in 15x8s. I adore down to about 15 psi on the beach and 8-10 for wheeling. I'll probably play around with more single digits at the beach this year. It's got OBA, so I'm not worried if I pop a bead.
This is the 35 on my Jeep at ~10 lbs
This is my brother's jeep, 32x11.50 on a 15x8 at 10 psi
03-14-2019, 12:56 AM
#7
How's she goin' eh?
it’s a couple of bad angles but when I run on the sand it’s somewhere around 15psi. These aren’t E load but I ran E load on my ranger cus it’s all the store had in stock and I was adamant about running duratracs.
I ran those duras at 15psi too and the thick sidewalk didn’t even show signs of bulge. It’s gonna be a little uneasy feeling running that low, but it’s doable like others have posted. I trusted my buddy’s when they told me that my first time out.
On the street I ran the duras at 35psi. The tire store had them at 50psi and I was all over the road since my ranger was only 4300lbs.
Last edited by M0RRIS; 03-14-2019 at 12:58 AM.
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ChrisAttebery (03-19-2019)
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03-14-2019, 07:58 AM
#8
Senior Member
03-14-2019, 09:15 AM
#9
How's she goin' eh?
03-18-2019, 08:44 PM
#10
Junior Member
Right after I got my truck, we were down on the north end of the Outer Banks where you have to drive on the beach to get to your house. I aired my 18" Cooper Discoverer on stock rims down to 15PSI and was just fine and was able to cruise 35mph down the sand no problem. Now granted the only concrete I saw with them that low was the 1-2 miles back to the nearest service station with a high powered compressor to air back up.
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ChrisAttebery (03-19-2019)