70P VIAIR Portable Compressor Kit (12V Car Charger/Outlet): The hose is 4 feet, the cord is 16 ft. (Total 20 ft., and plenty of length) The gauge is in PSI and BAR, goes to 150 PSI. I have filled 8 tires already, had it about 3 weeks now. It fills fast (very fast for such a small compressor) and like I said before it is extremely quiet.

For a size reference


Pump with in-line fuse

 

I have one like that, helps a lot on the air up process. I am thinking of installing a permanent tank where the spare used to go, have a compressor to air the tank when leaving the beach, and have the line be by bumper so I can just plug and air up!


I have 31s, I usually air to about 10-15 psi.

 

A good set of tyre deflaters also comes in handy. You set them to the required pressure & screw them on. They deflate to the pressure & you simply remove them & all 4 tyres are at the same pressure. Beats holding a matchstick in the valve to let air out.
These are the ones I got. The American ones were double the price!

http://www.staunproducts.com/tire-deflator-features.php

 

I go off pavement quite a bit actually. I usually air down to 20 psi with my Pathfinder At's.
Last weekend we drove the entire length of Longbeach (Washington) without airing down.

 

For where i go i usually go down as far as 10psi. But i usually have a mix of both sand and rocks that I'm crawling over so i need the low pressure to make as big of a footprint as i can. For just loose sand though, going between 15-18 psi would be just fine. Gives ya enough deflection in the sidewall to get the extra traction you need and if you are moving at speed it definitely will make the ride much smoother than the full 35psi.

 

i live by some dunes, and i go there 3 times or so a year. so im pretty good with sand, so i go at 12psi, and i have the same size tires u do. i feel fine with them that low.

 

In sand I air down to 20 psi on 31 10.5 r15 BFG mud terrain ta's with no problem's. went down to 10 one day & broke the bead & that sucks.

 

I also got the Viair gauge deflator, continuous or burst, I thought it worked great and was fast

 

Last time I tried to drive on sand with fully inflated tires, I had to be pulled out by a Land Rover.

As soon as I deflated only my rear tires, I was crusing the dunes no problem. I deflated them to approx. 13 psi.

I then towed out a Hyundai about 30 minutes later. Just for you

 

the beach i go to has an air station there for you its great and i normally air down to 15-20 psi