What psi is anybody putting into their 265/75 All Terrains? I have looked all around the tire and I guess I am just not seeing it. Right now they are at about 32 psi which is what I have put into every tire I have owned (car or truck) and they seem to flatten out at the pavement a little. Is that normal?

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2000 F-150 XLT
4.6 Triton V8,3:55,AT,2WD
SuperCab, SB, StyleSide
Gold + Wedgewood Blue w/ tan interior, Captains chairs,
Mods:Kenwood 40x4 CD player/changer, True Dual exhaust w/ 18" glasspacks
w/ chrome tips out the back, bug/rock shield, K&N air filter,tinted windows
265/75/16 BF Goodrich All-Terrain TA's
Westin Chrome nerf bars.
Soon: Spray-in bedliner,maybe 3" suspension lift eventually.

[This message has been edited by 19-SeventyFord (edited 07-17-2000).]

 

I'm rumming 65psi in all four corners. It's kinda bumpy. I'm thinking of airing down to 50psi in all four corners.

Ps. I'm running 285/75/16 BFG KO's

[This message has been edited by Loser1 (edited 07-17-2000).]

 

It depends upon whether you have LT or P series tires.

Check out http://www.bfgoodrichtires.com/ and find your tire.

Hope this helps.

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Y2K™ Jim Gorka

Toreador Red, Keyless XLT SC SB 5.4L E4x4 4wDisc/ABS, 3.73LS, Skid, HD 7700# Towing, LT-245's on Chrome, Tube-Steps, Captain's, 6CD, Tonneau, named: "Nick"

 

Look at your door Jam on the drivers door will tell you how much psi to put in.
I run 32 all around on my truck. I wouldn't go much over 35 psi, but I see many people who do.

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1999 F150 4x4 4.6V8 regcab/shortbed
Oxford White with Wedgewood Blue two tone, with Blue Captains chairs
Bullet Cat Back, Superchip,WMS Velocity Tube with modified K&N filter.
Centerline Saber rims 17x8" with Firestone GTA 275/60hr-17 tires.





[This message has been edited by Don C (edited 07-18-2000).]

 

Look at all those different answers.

Dont look on the door - thats for the stock tire combination (manufacturer, tread pattern, and size)

65psi seems way too high - you'll get a center-based wear pattern. Your ride will be rough, handling/cornering ability will be reduced, etc.

LT or P - thats for load ratings. A factor, but by itself, dosent determine the correct psi.


The actual tire pressure is dependent upon the the weight that is on the tire. The tire's tread should be perfectly flat (width wise), with about an inch of contact (fore to aft). The pressure will will vary with a different type, sizes, construction, and/or load range of the tire.

Any easy way to determine the correct pressure is to air all the way up (to the tire's maximum load range), roll through a little puddle, and look at your footprint. The pattern should not be full width (unless your vehicle normally weighs in at the tire's max load range). This pattern is high-centered - a bow is formed across the width. You may see the entire pattern, but the center will look 'denser' than the edges. Keep airing down, little by little, while checking your pattern and stop when you have a perfectly flat width print of equal density. This is your correct pressure for your current weight. If you air down beyond this point, you will increase the fore-aft contact patch, thus increasing your rolling resistance which will lower your mpg, increase your chance for hydroplaning, increase noise, retard handling, etc.

As you can determine, with an empty bed, the rear pressure should be less than the front pressure. With a loaded bed, the rear pressure will be greater.

I know this was long winded, but you did ask.

 

Hey Loser1 (no disrespect intended)

Your running 65 psi in a BFG 285/75-16. I checked BFGs specs. The load range for that tire at 65psi is 3305 lbs (which happens to the the tire's max load range).

So at 65psi, your truck's current weight (with you and your normal load in it) should be 13,220 lbs (3305 x 4) for the tires to wear and ride properly.

Thats a heavy ***** truck you got there <grin>.

 

riotrob,

I've never looked at it as a weight distribution formula. I have been checking the wear regular basis. The tires seem to be wearing normally. I think I will air down the tires.

Thanks!

Mike

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99 4x4 XLT supercab 5.4L Flareside, Deep Wedgewood Blue/Med. Graphite w/Captain Chairs, Pioneer DEP-4000, Tint, K&N, Bedliner, 3" Catback w/3 Chamber Flowmaster, Superchip, 285/75/16 BFG A/T on American Racing Python wheels, Stull Billet Grill, Clear Corner Lenses.

'00 Expedition XLT, Silver w/Dark graphite interior, 5.4L, Stull Billet Grill and some other stuff. All in all she'll stay stock. Ok, maybe a Flowmaster 50 series soon.

 

19-Seventy,

You want the tires to flatten out a little at the road, that is perfect. If they don't flatten a little, you are will have a loss of traction and a shortened tread life.

I've run BFG AT's all my life. If you run PSI that high, the centers wear out way before the sides of the tread ever do. I have found that 26-32 psi is about perfect for handling, mileage and tread life. And this is on a 6500# full size Bronco.

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Boss™

Just Ordered 2001 F-150 Lariat Wht/Slvr medium graphite leather, 4x4, SC, SB, SS, 99L 5.4L, 44E tran, 7700# payload, Class III Tow, 3.73LS, Skids, Capts chairs, 4W disc ABS, shift-on-fly, keyless, HD everything
Planned Mods:
Westin Chromed Stainless Nerf Bars, ARE LS II bed cover, Bedrug™, Gibson Swept Side Cat Back, K&N filter w/airbox mods, Headman headers, Superchip, 3" body lift with at least 33's, alarm/pager/auto start system, stereo system




[This message has been edited by Boss96Hog (edited 07-19-2000).]

 

Just had brand new BFG AT KO, 285/75/16's put on my truck and the dealer aired them all to 40psi... seems to ride and handle very well.

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-JonC-
*2000 4x2 F150 Supercab
*4.6L V8
*BFG 285/75/16 AT KO's
*16 x 8 PCW 5-spokes
*K&N GenII FIPK
*Custom Cat-back w/ Flowmaster 50 Series
*Fabtech 3.5" Performance lift
*Extang Black Max soft tonneau
*tint/vent visors/air deflector
(no, I did NOT get stuck in
the accessory dept. at K-Mart!)

 

I've driven BFG All Terrain 265/75s for over 23,000 miles with 32 lbs. in each corner. The traction has been superb in wet, snow, dry and sandy conditions (I don't even have to air down on loose sand). When pulling a heavy load, I simply set the Rancho RS9000s to 4, but that's another story.
The tires still look new.
My two cents worth.