Airing down tires - JeepForum.com
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  • 1 Post By ColdCase
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post #1 of 12 Old 01-20-2020, 07:11 PM Thread Starter
paullee01
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Airing down tires

Curious as to what you all think...Being 20" tires are pretty low profile does airing them down really make any difference? I've been airing down to 18lbs and it don't leave much sidewall. I really can't tell if the footprint is any larger. I'm kinda thinking it doesn't make a difference on this size wheel and tire?


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post #2 of 12 Old 01-20-2020, 07:20 PM
ceb1
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Quote:
Originally Posted by paullee01 View Post
Curious as to what you all think...Being 20" tires are pretty low profile does airing them down really make any difference? I've been airing down to 18lbs and it don't leave much sidewall. I really can't tell if the footprint is any larger. I'm kinda thinking it doesn't make a difference on this size wheel and tire?
When/why are you "airing down" the tires?
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post #3 of 12 Old 01-20-2020, 07:51 PM
ColdCase
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Yeah folks don't air down the OEM 20s much if any. They do air down larger sized 20 inch tires.
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post #4 of 12 Old 01-20-2020, 08:05 PM
rjlindblom
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If youíre off-roading some like to air down. On a 20Ē I would be cautious. Unless I was running a tire with stiff sidewalls and an aggressive tread and off-roading then I would consider it. For the most part I would keep the recommended air pressure in the tires.
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post #5 of 12 Old 01-20-2020, 08:12 PM
Fast55
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On a 20" tire and factory wheel there isn't a lot of benefit but you are putting the wheels at risk. I would stay at your street pressures until an actual stuck that a lower pressure might help with.
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post #6 of 12 Old 01-20-2020, 08:20 PM Thread Starter
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Quote:
Originally Posted by ceb1 View Post
When/why are you "airing down" the tires?
Beach sand so far haven't gotten stuck on stock tires at 18psi. (Won't go any lower) Everyone kinda confirmed my thoughts about airing down the 20's not the best idea. I may try running in the sand with 36psi and see what happens....I've been wanting to try my Kinetic rope anyway!

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post #7 of 12 Old 01-21-2020, 06:44 AM
rjlindblom
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You also might look at some traction boards if you do end up stuck.

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post #8 of 12 Old 01-21-2020, 11:50 AM
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The traction benefits of airing down a low profile tire are marginal at best because the sand will still be softer than the tire at 18PSI. What you are doing is considerably increasing the risk that you roll a tire off the rim. If you have really big off road tires it definitely helps but these guys run really low pressures <10PSI so the tires mold around the terrain. If you are running OEM tires you are best keeping airing down as a last resort in the event you do get stuck. In this scenario air down and work the wheel from side to side and it will often get you out. If you don't mind looking like a prepper, traction boards do work well in sand.
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post #9 of 12 Old 01-21-2020, 03:31 PM Thread Starter
paullee01
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Thanks for all the good advice. My last GC 2014 Limited I took a little more chances then I do with this one. So far I've only been stuck once and that was my own fault for going in mud with the stock tires. I do own a pair of Tred 800's (I've never used them on my Jeep) but my buddies F-150 got bogged and they did work great! I really love the High Altitude but the 20" wheels/ tires are it's downfall.


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post #10 of 12 Old 01-21-2020, 04:31 PM
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There are beaches, then there are beaches.....soft deep sugar sand requires a wider foot print and preferably a less aggressive tread, as you want to "float" over the sand. Lowering tire pressure also relieves pressure on the tranny....when i didn't air down in my old 97 limited on the beach i could smell the transmission oil.

I can't speak to 20"ers, but my 08 gc limited i easily take down to 15-20 lbs depending....

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post #11 of 12 Old 01-21-2020, 04:48 PM
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PS..i just watched that video ^^...he's not on a beach, but a desert and he's reached some solid ground. That would not work on the south end of Brigantine or Cape Hatteras; the truck would've been buried to the chassis and the wheels would just spin and spin...

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post #12 of 12 Old 01-21-2020, 09:07 PM
Blackshirts
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20's you are riding on the rims already. Stay out of the soft sand.

regular size rims and tires, air down to 12lbs and float over the soft stuff at the dune entrances and exits.

20's you are street diving.
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