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kc92886 01-26-2012 03:05 PM

How Low Should You Go? (PSI)
I've had a lot of success going with 20 PSI in really fine sand (think dunes). I would imagine you might need some bead lock to go much lower than that. What is everyone's take on this?

Bmwister 01-27-2012 09:32 AM

Re: How Low Should You Go? (PSI)
It is not an exact science and truly more like trial & error off road. It depends on the tire and how much sidewall height you have. Some tires have too soft a sidewall and if they are aired down too much, you can end up bending a wheel rim and/or losing the bead if you encounter something hard buried in the sand. Alternatively, you can get too aggressive 4-wheeling and pull the bead on a hard turn which can provide you with the unpleasant experience of changing a flat in the sand. Let us know what size tire you have and that 20psi works in sand; it helps others calculate limits and risk threshold, so thank you for your info.

JeepCoop 01-27-2012 09:48 AM

Re: How Low Should You Go? (PSI)
Been down to 15ish in the sand...just DO NOT take turns fast or youll roll or blow out the tire off the rim. And if you do blow it off the rim, the best and coolest way to get it back on is a little bit of gasoline inside the tire, light and BAM science takes over! Seen it done once!

SO COOL! haha

kc92886 01-27-2012 09:57 AM

Re: How Low Should You Go? (PSI)
I'm loving that set up Silver Surfer. Right now I'm running Yokohama Geolander AT/S 265/60/18. At 20 PSI I was able to handle all of the dunes in the Johnson Valley area, as well as a lot of rocks on some of the trails. I was nervous about the rocks, but did not have any problems.

JeepCoop 01-27-2012 10:19 AM

Re: How Low Should You Go? (PSI)
Thanks KC!! Nice sounds like fun. Pics?! :)

kc92886 01-30-2012 09:48 PM

Re: How Low Should You Go? (PSI)
2 Attachment(s)
The first pic is on the dunes BEFORE I've aired down.

The pic from far away is when the tires were running at 20psi, although it's impossible to tell from that distance.

These are the only ones I have with the 18's. Everything else is with the 20's which I'm no longer running.

OzTJ 02-02-2012 03:33 AM

Re: How Low Should You Go? (PSI)
I've run the 20" overland wheels at 17psi no problem on the sand, but as mentioned above I wasn't exactly hammering along, just taking it easy. :)

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