Need Advice on two questions.
1) Installed BFGR AT/KO 285/70/17 on my 4x4 05 Screw and the tire sidewall indicates max. 65 psi and the manufacturer's door sticker says 35 psi front and back. The folks that installed them said to go with 35 but the last time I had them balance/ rotate they went with 65 psi.
2) Now this is for the beach drivers and may sound like a stupid question but if I go with 35 psi on the road will I still need to deflate when driving on the beach? I've driven on the beach at 25psi with no problems but hey if I don't need to deflate and inflate that's even better.
Thanks all in advance!

 

The 65psi max is just as it states..."the max" dont go any higher. If you put that much in, I would think it would be like riding a log wagon. The higher pressure would be for a 3/4 or 1 ton with the heavy engine or if your doing some heavy hauling. My opinion your 35psi is a good average pressure for your everyday driving. Ive tried playin around with pressure before with my 35"mud terrains...you can majorly tell a much rougher ride going over 35psi up to and over 40psi. As far as beach driving...Ive drove on daytonas many times, never changed pressure...not sure why you would though?

 

Hey guys, how big, what size tire can I put on the stock rims. F4 crew cab, 2004

 

You should be able to fit 33" tires on your stock rim as far as I know! But what size rim you have, be it 17s or 18s, will determine the metric number...but pretty sure you can fit a 33 on either stock rim!

 

I drive the beaches of the Outer Banks, N.C. and rule of thumb here is to lower pressure so you have more thread for traction. Soft sand in many spots.
Thanks for the input.

 

I Can Use The 33" Rims Without Any Left On The Truck?

 

I normally drop to about 20-25 lbs. at Oregon Inlet, never gotten stuck. Now my know it all brother-in-law decided to keep his Durango at street pressure. I'll bet you know who was getting pulled out of the sand at just the entrance!!!!!

 

05 Screw...my thoughts and what I did in Daytona. If i knew i was gonna be in soft sand, I would flip my switch to 4wheel drive. As you know...lock in and out with the turn of a switch. Plus I dont know how much you use your 4x4, but its a good idea to lock it in once a month or so...so that always worked for me, alot easier than having to change pressure!

William Hornsey...I think you meant 33" tires, but again I dont know your rim size...17 or 18"? I think you can put 33s on stock rims 17" or 18" wheels. About the lift, Yes I think it would work...but you might want to crank up your torsion bars to raise the front up alittle!

 

Stang 302..... Dude! You can drive a car on the beach at Daytona! This man Is talking about driving in deep soft sand if I understand him correctly. The reason for airing down is to gain flotation characteristics on sand. The lower the air pressure the bigger the footprint you'll leave. In other words you'll sit on top of the sand instead of cutting through it like a pizza cutter! I live in NC and used to go to Fort Fisher on a regular basis. I usually aired down to around 20-25 PSI and then re-aired when I pulled out. There was a gas station with an air compressor right there. You might make it without airing down depending on the conditions but I wouldn't chance it. I blew right past a guy on the beach that didn't air down. He was in the process of airing down when I passed him and there was another truck there to pull him out.... he was sunk to the frame in sand! IF there isn't a gas station near by then you'll need a good quality 12V air compressor when you get off the beach. Good luck and have a blast. It's alot of fun!

 

Stang it's pretty obvious you've never run soft sand. Daytona beach where they let you on the sand is just about as hard as Interstate 95.

05' you can't just pick 35lbs and hope it's right. You've screwed around with what was stock. The tire tread depth needs to be measured every 1000 miles for 5-6000 miles. If you are wearing more on the outside of the treads you need more air. If the center of the tread is wearing more you need less air. You'll also probably find you need a few more lbs on the front tires.

35lbs really doesn't let a tire squash out for floatation in the sand. Then again the sand on every beach is different. You should be able to drop to 15-16psi to crawl out of soft spot, but don't do anything crazy at that pressure except drive straight ahead and slow.. You could pop a bead on the rim. Just because you can move with 35psi doesn't make it easy on the truck.

I learned on a new 76 Blazer. 18 miles each way down and back Assateague beach with at 35psi burnt 28 gals of fuel. Made the same trip at 20psi and burnt 7-8gals.. It makes big difference whether you are floating on or digging your way down the beach.

 

Well yah guys I understand that...your exactly right! He never said anything about sand dune driving or anything like that. Ive never been to the "outer banks" N.C. On the other hand...I have driven on Daytona and like you said...YES it is like a "road" Afterall, they started the races of daytona on the beach! Thats the only beach driving Ive done...meaning, thats how I answered his question, from my experiences! Had he specified the kind of "sand" driving he was doing...I would have answered just as you guys are...cuz YES your right about that type of "beach driving" as he stated the question!

 

Thread hyjacker

 

Thanks again everyone for the input.
But like I stated in my first thread I usually drop it to 25psi, with no problems, and can lower it to 15-16 in case I get stuck. So far I have not been stuck but like they say in the Outer Banks, there are two types of drivers: ones that have been stuck and ones that will get stuck. It will eventually happen if you drive the beaches alot. And yes, I keep a 12v air compressor with me at all times. A small investment that has paid off.
Thanks again for the input guy's!!!

 

Hey 05... just a FYI. I had a 97 Expedition with 8 ply Uniroyal laredo's on it. The max PSI on the tire was 65. I usually ran about 45 all the way around. The ride was fine and the tread wear was great. Nice and even. The tires were rotated every 3500 and I had no problems. You will have to play with your pressure like stated above to find out whats right for your truck. If you over inflate you will wear out the center, if you underinflate you will wear out the edges. Keep in mind that this is on the road only. Off road in deep sand you should always drop down the min you can get away with without popping off the bead.