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99dak
Dodge Dakota
9/02/2001
16:25:44
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 Subject: tire psi/rotation
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Message:
just put a new set of 31x10.50 bfg a/t ko's on my 99 4x4 slt . can any reccomend tire psi ? non off-road / daily driver hwy/local - part time tow vehicle {1600 lbs.} also how often should i rotate for the longest life ??? thanks
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Blizzard
Gen III
 
9/02/2001
19:10:08
|  RE: tire psi/rotation
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Message:
I run my BFG's at about 40 pounds. Ran that amount of air in my 35" BFG's on my F150 too. Had lots of miles on 'em and they wore real good. I rotated them about every 5-6k miles too.
'01 QC 4x4
5.9L, 3.92 LSD, loaded
www.geocities.com/blizzzzard69
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99slt
Dodge Dakota
9/03/2001
12:48:42
| RE: tire psi/rotation
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Message:
40 psi not too harsh ? when they were mounted only had 32 psi ????
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kota on 20s
Dodge Dakota
9/03/2001
14:48:51
| RE: tire psi/rotation
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Message:
just for crusing around town go by what DC recomends.(air psi plays a huge role in understeer/oversteer situations) i think its around 32 psi. it should be on your driver door jam along with the stock tire size. when you tow or haul, you can always up the psi for more load carring ability.
Eric
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Bruce P
Dodge Dakota
9/04/2001
20:19:25
| RE: tire psi/rotation
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Message:
DC clearly recommends over 40PSI for the 31X10 tires.
Although the doorjamb suggests somwhat less... the manual says to "...ADD 10PSI TO THE DOOR JAMB NUMBERS..." if you wish to run at highway speeds with the large LT tires.
Why is this?... can anyone say "explorer" or "firestone"?
LT rated tires have a different design than "normal" tires and need to be treated differently.
It is recommended that if you do not haul around 500LBS of tools day-in and day-out, install better-handling and smoother-riding tires that are NOT LT rated. The LT tires have MUCH stiffer sidewalls to handle more weight. This stiffer sidewall also builds up more heat if underinflated to 32PSI.
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kota on 20s
Dodge Dakota
9/05/2001
01:03:58
| RE: tire psi/rotation
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Message:
like i said, go by what DC recomends. if they call for 40+ psi run them at that.
the exploders dont come with LT rated tires, they come with "P" ratted 235/75R15's.
Eric
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J. C. Brandon
Dodge Dakota
9/05/2001
14:20:24
| RE: tire psi/rotation
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Message:
The sticker in the doorjamb pertains to the smallest tire you can use without reducing the GVWR. My truck came with 31s but the sticker shows specs for a smaller tire. Look for a tire pressure insert in your owners manual. If you don't have it, perhaps the dealer will give you one.
I run 40psi most of the time. On washboarded dirt that much pressure causes the truck to slide around a lot so I drop to 28psi. For most other offroad conditions I drop to 15. On sand I go to 12.
I've got 48,000 miles on the original Goodyear Wranglers. I've only rotated them once and they are all wearing evenly. Expect to get about another 5,000 out of them.
-J.
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RJKobbeman
GenIII
9/05/2001
14:59:44
| RE: tire psi/rotation
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Message:
Also, for what it's worth, the Firestone/Ford saga was related to UNDER-inflation.
I highly recommend using the psi numbers printed on the tire.
Rob
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kota on 20s
Dodge Dakota
9/06/2001
00:14:36
| RE: tire psi/rotation
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Message:
i would not go by what the tire psi reads. that just says what psi the tire can handle. go by what the manufacture recomends.
most auto manufactures recomend running a cirtain pressure in the front and a higher pressure in the rear. this if for your safty and it highly effects understeer/oversteer in a panic situation.
Eric
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Bruce P
Dodge Dakota
9/06/2001
18:35:01
| RE: tire psi/rotation
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Message:
DO NOT RUN HIGHER PSI IN THE REAR OF A PICKUP TRUCK! (Unless hauling some cargo) This is NOT a car.
The higher PSI in the rear will cause the center of the treads to wear more than the edges. This is because of very low vehicle weight in the rear of a pickup truck without a load.
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jimmeyjack
Dodge Dakota
9/06/2001
22:32:13
| RE: tire psi/rotation
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Message:
Lets see, my tires say 2250 lbs each at 50 psi x 4 = 9000 lbs and 1 sore butt!
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DarkFury
Dodge Dakota
9/07/2001
09:18:25
| RE: tire psi/rotation
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Message:
Well, currently I am running 35 PSI on my 30 x 10.5s... so everyone is saying to run 40 for "everyday driving" huh?
Cool... now another question. In the wintertime, when things get "slippery", should I drop the PSI down to about 32 - 35 or lower? I plan on putting a 350 lb weight block in the bed (made of a 2x4 wood frame and 10 35 lb cinder blocks) to help me out in the snow here...
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Robert
Dodge Dakota
9/07/2001
10:43:24
| RE: tire psi/rotation
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Message:
You can't always go by what the manufacturer recommends because you do not have the same tire on the truck! Find out the safe operating psi ranges for your TIRE not the truck. I don't care if the manufacturer recommends 20 pounds... if the tire is not meant to run at that psi, you will be sorry.
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J. C. Brandon
Dodge Dakota
9/07/2001
11:44:45
| RE: tire psi/rotation
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Message:
On my truck 40 psi seems too hard for snowy road driving. I drop to about 32 or so. That's for snowy pavement on mostly plowed roads around town and stuff. On snow in the backwoods, I drop down to 15.
With 350 pounds over the rear wheels you will probably have close to 55/45 front to rear weight distribution. I've got a 200 pound shell plus a few other random things back there and I've got 57% of the weight on the front axle, 43% on the rear.
-J.
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J. C. Brandon
Dodge Dakota
9/07/2001
11:46:11
| RE: tire psi/rotation
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Message:
On my truck 40 psi seems too hard for snowy road driving. I drop to about 32 or so. That's for snowy pavement on mostly plowed roads around town and stuff. On snow in the backwoods, I drop down to 15.
With 350 pounds over the rear wheels you will probably have close to 55/45 front to rear weight distribution. I've got a 200 pound shell plus a few other random things back there and I've got 57% of the weight on the front axle, 43% on the rear.
-J.
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kota on 20s
Dodge Dakota
9/07/2001
11:46:31
| RE: tire psi/rotation
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Message:
no auto manufacture on the planet will recomend 20psi. heck tires with E-load range have a max psi of 80. not that you would ever put them on your dak, but you can safely run them at 32 if you wanted.
go by what DC recomends, if its at 40 then run 40. if you drive in snow or sand you can always drop the psi a couple of pounds to get more bite.
Eric
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Robert
Dodge Dakota
9/07/2001
14:23:12
| RE: tire psi/rotation
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Message:
Kota on 20s,
You obviously missed my point. OF COURSE 20 POUNDS IS TOO LOW! I was just trying to make a point that no matter what the manufacturer recommends, you have to stay in the range of the TIRE manufacturer. This was one of the elements of the Ford/Firestone fiasco. Ford ran the Firestone tires low so the vehicle handled better... but the low (too low) pressure damaged the tires. You have to take everything into consideration.
Now, before this gets turned into a Ford/Firestone battle, I will state that I could care less about Ford/Firestone... and that I am not trying to get into this discussion. I am just using them as an example. You can't look at the pressure recommendations on your door jam and expect them to be OK for every fricken tire in the world. Heck, half the time they are for tires that didn't even come on the original vehicle.
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Throttle
Dodge Dakota
9/07/2001
21:13:15
| RE: tire psi/rotation
IP: Logged
Message:
I go with what it says on the sidewall of the tire.
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greybeard
Gen III
9/07/2001
21:47:21
| RE: tire psi/rotation
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Message:
I'm wondering why nobody suggested asking a Goodyear/Goodrich/etc. dealer? They are the tire experts in my humble opinion. I agree completely that load and driving conditions play a vital role in selecting the correct pressure but I would think the tire dealers would provide the best information. Keep in mind, DC or any other vehicle builder is also compensating for the suspension components and ride quality considerations. I had a Nissan Pathfinder and the door jamb sticker recommended 26 lbs. - which was probably intended to soften the ride for "soccer mom's" tender butts! I think most people will agree, higher air pressure = better wear AND handling (on paved roads, of course!)
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Kenny
Dodge Dakota
9/08/2001
18:06:57
| RE: tire psi/rotation
IP: Logged
Message:
Go by what the manufacture recomends IF what they have on the sticker is the same size tire on the truck. If the tire is different than what the sticker says. Go by the pressure printed on the tire.
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