just got bfg AT 285/65/18, problems

[simps33]

i just got the bfg AT 285/65/18 that replaced the stock michelins. i have no lift.

i have not reset my computer yet.

the problem i have is that at certain speeds, if i give it some gas, i will get the stability/traction control to come on...the one with the squiggly lines.

its like my computer shift points are not calibrated for the new tires.

i had discount tire put 50 psi cold in the tires, drove it home and have some sway. i dropped the psi down to 45 psi hot and that seemed to help the sway and a little on the traction.

i am going to reset my computer tonight and see if that does the trick.

anyone else have this issue? do you have to take it to the dealer to get something reset? (zero point calibration?) what psi should i run with these tires for normal wear?

[rockstate45]

If you're getting the squigly lines with those tires then you're driving too fast. I never get my TC to come on unless it's in the rain and I'm pulling out.

Try airing down the rears to about 40 and the fronts to 43.

-rockstate

[brtn540]

I have the same tires and haven't seen the symptoms you are describing. I would have a shop take a look at it maybe from an alignment perspective or something.

[SE2000]

What load rating are your tires? I would suspect that you were overinflated. You also need to check pressure cold. There is no reset for tires, only tpms

[simps33]

They are load range E, so 80 max psi. i probably do have them overinflated. but would that cause them to have TC go off if you give it gas? ill be cruising at 50 and floor it and it will kick on. on the stock tires it would just launch.

[SE2000]

Yes it will as you have harder rubber and with nothing in the bed, the tires will be slightly rounded so you give it gas, and you might only have a few inches of actual rubber pressed into the road

[VooDooDan]

I would try using less air. I run mine at 38psi with out any issues. Discount tire put 50psi in mine when I first got them and the ride wasnt very nice. I didnt have any issues with the traction control though.

[SE2000]

I run 40psi in my 4 ply duelers and I think it is a good jumping off point for any tundra tire.

[Saltwater Sam]

I have had these tires since I bougt my 07 rcsb and have not had any trouble. Keep the presure at 40....anything more makes it a pretty rough ride. No problem with the TC.

______________________________________

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[RamItOne]

Why do people always seem to think that if they have to over inflate (over auto mfg specs) do they really think the max psi means thatsthe best for their application? Low 40s would be as high as you need to go. If your tire didn't say 80psi would you run it at 50? Somehow I think the auto mfg knows a lil bit more... Well except when ford reco 26psi in their ford exploders.

SE2000 hit the nail on the head with the decrease in contact patch.

[FS 2000]

I have to agree with most. your pressure even with towing dosen't need to be over 40.
i have 285/55/20 e-rated and i keep them at 38 when not towing and 42 when i do tow.
they work great at those pressures.

[simps33]

i just got a reply back from michelin and they say to run 35 front 40 back. i did lower them to 40 cold and i havent had any issues yet, the responsiveness is back now. i do still think 40 is a bit high now as well, so im going to go down to 38.

[Chris 345]

Originally Posted by RamItOne

Somehow I think the auto mfg knows a lil bit more... Well except when ford reco 26psi in their ford exploders.

HeHe good one...ford decided it would be acceptable to kill a few hundred people so they could have a softer ride than the Jimmy

[RamItOne]

LOL yeah they didn't want to invest in building a better suspension so what if you have a "few" rollovers. Firestone was absolved as they produced numerous documents sent to ford advising of the issue with underinflating a tire. Firestone stepped up to the plate and still replaced the tires. The biggest flaw in that tire was the tread wouldn't wear down so the average customer still thought since they had deep tread left it's still a good tire. They saw a lot of them with 60-80,000 miles on em and you can't expect the integrity of the tire to still be there

Alright back on the original subject......

[off roader]

Id bet those tires wouldnt get no 60,000 on my Tundra. I can smoke em off in 25-30k on accident. Wimpy Fords.