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Tires, How low can they go?

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smfulle View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote smfulle Quote  Post ReplyReply Direct Link To This Post Topic: Tires, How low can they go?
    Posted: 12 Feb. 2014 at 10:17am
Getting ready to go to Southern Utah for some slick rock trail riding. I have new Cooker NDT tires and tubes mounted. Anyone have any insight as to what the lowest tire pressure I can safely run?
Stan
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Post Options Post Options   Thanks (0) Thanks(0)   Quote rocnroll Quote  Post ReplyReply Direct Link To This Post Posted: 12 Feb. 2014 at 11:04am
I never run more than 20 in NDTs because the are so stiff anyway.

That's just me.....opinions will vary.



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Post Options Post Options   Thanks (0) Thanks(0)   Quote bkreutz Quote  Post ReplyReply Direct Link To This Post Posted: 12 Feb. 2014 at 11:17am
If they've been mounted for a while you could probably let all the air out and not notice much of a difference. (at least on  6 ply's like mineLOL
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Post Options Post Options   Thanks (0) Thanks(0)   Quote smfulle Quote  Post ReplyReply Direct Link To This Post Posted: 12 Feb. 2014 at 11:20am
We are planning on hitting this trail, but not attempting the more challenging obstacles. I'll be driving around most stuff, but hope to take a few things on that I can do safely in a stock 2A. So there will be some rock climbing like activity, and some bumps that I want to soften up if possible.
 
Stan
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Post Options Post Options   Thanks (0) Thanks(0)   Quote jpet Quote  Post ReplyReply Direct Link To This Post Posted: 12 Feb. 2014 at 11:36am
I have run my NDTs as low as 10 and they ride awesome but then you will need to air them up before you hit the highway. On the FCT, I will drop them to 20. They feel pretty good off road, but I can still drive on the highway. At 20 lbs, you can feel the difference on the highway but it is well within control.

Some have told me that if you run your tires at 10 psi, you run the risk of the tire spinning on the rim and perhaps cutting the valve stem but I have not experienced this. I only did it for 2 days of trail riding and then aired them back up before hitting the highway.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote bretto Quote  Post ReplyReply Direct Link To This Post Posted: 12 Feb. 2014 at 12:13pm
I wish you could pick me up on the way down. :(
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Post Options Post Options   Thanks (0) Thanks(0)   Quote smfulle Quote  Post ReplyReply Direct Link To This Post Posted: 12 Feb. 2014 at 12:41pm
Bretto,
Only going to be in the 70's down there  this weekend. I don't know if you could stand it.Evil Smile
Stan
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Post Options Post Options   Thanks (0) Thanks(0)   Quote F Bill Quote  Post ReplyReply Direct Link To This Post Posted: 12 Feb. 2014 at 12:45pm
How many ply rating are those Cokers?
If you haven't checked out the tech FAQ section, go to:
http://www.thecj2apage.com/forums/tech-faq_forum57.html
for a lot of great stuff you need to know!!

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Post Options Post Options   Thanks (0) Thanks(0)   Quote smfulle Quote  Post ReplyReply Direct Link To This Post Posted: 12 Feb. 2014 at 1:07pm
Well, neither Coker or Summit Racing, from whom I bought the tires give an actual ply rating other than "bias ply". I suppose it might say something on the tire itself, but I don't remember. I'll check it this evening.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Metcalf Quote  Post ReplyReply Direct Link To This Post Posted: 12 Feb. 2014 at 1:18pm
Moab in a flat fender is a BLAST! 

The tubes kinda complicate things, but on 15 and 16" rims the bead lip is still the same as a tubeless tire correct? The only thing to really watch out for is spinning the tires in the rim. You don't really see that happen too often at 10psi and above. 5-10psi I have seen it happen on new rims with smooth bead lips, espeically chrome steel rims. 

If your still running manual steering you probably don't want to go much below 10psi. I would start at 15psi and go towards 10psi as you feel more comfortable with it. 

If you can, you might grab a spare tube to take with you. I would imagine that shops in town might have one....but it could come in handy out on the trail too worst case. 

I wish I could get over there this weekend! 

This thread needs a picture of a flat fender in moab.....


Have fun, stay safe. 
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Post Options Post Options   Thanks (0) Thanks(0)   Quote smfulle Quote  Post ReplyReply Direct Link To This Post Posted: 12 Feb. 2014 at 1:43pm
Metcalf, we're actually going to SouthWEST Utah, St George area. Lot of family there so free lodging. Same red rocks though not quite so famous as Moab.
 
Don't think I'll take on things in my stock rig that you do in your flat fender on steroids rig, especially since I am really a novice driver.
I'm really pumped about this trip. Doesn't compare to your adventure to the snow fields, but this will be my first time on anything other than dirt and mud.
 
Here's a video from the trail we are going on. It's not a flat fender and I won't be trying this obstacle, but you can see there is some challenging spots there.
Stan
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Metcalf Quote  Post ReplyReply Direct Link To This Post Posted: 12 Feb. 2014 at 1:51pm
Cool! I have wanted to head down that way. I am driving over to the Rubicon trail this June so I might just have to stop in that area and poke around. 

Wheeling is wheeling. I spent a lot of my youth in a bone stock flat fender getting into just as much trouble as I do now! You'll have a blast. 


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Post Options Post Options   Thanks (0) Thanks(0)   Quote jeeper50 Quote  Post ReplyReply Direct Link To This Post Posted: 12 Feb. 2014 at 4:12pm
i run mine offroad and around town at 15lbs.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Carlsjeep Quote  Post ReplyReply Direct Link To This Post Posted: 12 Feb. 2014 at 9:32pm
Stan, you may be surprised at just what your stock Jeep will do. Use 15 to 20 psi and it would help to have a Lock Right in the rear axle. But that won't happen this trip unless it's already in it.

BobW told me some of the 16" rims have a lip like the tubeless rims do and they hold the tire on better. 

When climbing, the approach you take to the hill and rock is most important. 
Life is only as good as you make it.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Joe Friday Quote  Post ReplyReply Direct Link To This Post Posted: 12 Feb. 2014 at 11:40pm
Ditto on what Carl said, 15-20 psi.
 
Your wheels probably don't have safety humps in the bead area.
 
Regardless of whther the tires are 4 or 6 ply rated they are likely 2 ply Nylon.
 
I've dome most of the Moab trails in a stock 3B including tire test hill and lionsback, buy did not do challenges like Mickey's hot tub or the escalator due to probable body damage.
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