Toyota Tundra Forum

Just picked up my 2010 Tundra Double Cab, 4x4 TRD Off Road with 5.7L, automatic and tow package.

Today I planned on installing BFG TKO AT 285/65/18 tires on my stock aluminum Toyota rims but my local tire dealer wasn't sure how my tpms air pressure sensors would handle the potential 80 psi I might put in these tires.

I plan to pull a 18 ft bumper pull horse trailer that could weight up to 7,000 lbs with a 700 lb. tongue weight. My brother in law also has a bumper pull toy hauler I might tow that weights 10,000 lbs with a tongue weight of 900 lbs. When towing these trailers, I want "E" rated tires I can pump up to 80 psi.

I want the BFG AT's because I have used them before for years and love them for a variety of reasons.

If I install these tires on my stock rims, will the stock Toyota tpms sensors work properly at 80 psi? Can the stock valves with tpms, handle 80 psi without blowing apart? What psi are the stock Toyota tpms stems rated for? I have read a bunch of stuff on this site but can't find answers to these questions.

No one at the Toyota Dealership or the tire store could could answer these questions.

From what I have read on this site, the tpms light seems to come on when the tire pressure gets too low but I haven't read anything about what happens at high air pressure.

Thanks in advance for any help. My tires await me.

You set the TPMS to the pressure you want and the light will come on when the pressure drops 5 pounds. Not sure what the max pressure is.

I'm no tire expert but 80 pounds of tire pressure for 900 pounds of tongue weight sounds excessive. I put that much weight in my truck all the time and leave my tires at 40 pounds and they don't appear under inflated.

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You may not need to air up to the full 80 psi. Over inflating a tire will produce negative effects also. When I say "over inflated" I'm referring to air pressure required to support the additional weight, not the air pressure max of the tire. An over inflated tire will not handle properly & will not have a good footprint for traction. You may need to just try it with a few different pressures to see how it feels. Check with your tire salesman for his recommendation. I wouldn't think you would need 80 in the fronts, maybe start at 60 front and 70 in the rear.
As far as your question concerning the TPMS, I don't know if anyone can tell you for sure. These are engineered for for "P" rated tires. Will they trigger at the 5 psi spec? Will they leak? Will they be damaged with the excessive pressure thus not operating properly when lowered back down to normal?

One other question, Does anyone know what our wheels are rated for? All wheels have a rating. There is a max air pressure and a max carrying capacity.

There's a lot of 10 plys out there on the Tundras. I haven't heard of any wheel problems.

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2008 SILVER CREWMAX

• 5.7 LITER
• PIAA 540 X-treme White Driving Lighting System

I have rarely put in 80 psi even when I used to tow with a Chevy 2500HD with BFG "E" rated tires but I want to know what to expect should I even put them all the way up.

I have also usually run 45 psi in E rated BFG I have used in the past. I had E rated BFG's on my '07 FJ that I just sold to get the Tundra. I like how rugged this tire is. I sometimes drive in Death Valley where the sharp rocks can slice a tire and have to drive through bolder fields. I use the E rated BFG's for towing, hauling and off road driving.

I had two stock Chevy 2500HD valve stems blow when I pumped up brand new tires and wheels to 80 psi while towing a 5th wheel.

The next day I went to a tire shop and they installed metal valves and I never had a problem again. These were not tpms valve stems so I want to know what to expect with these tpms valve stems and wheels.

With the information I have to date, it apprears I will need to stay with the stock tires until I get more information.

Thanks.

those rubber stems can easily handle 80psi, they are metal inside. the place where they pierce the rim is all rubber and also the same with most metal covered stems.
sounds like you did not replace the stems when you put new tires on. with that pressure and the extended life of the E tires, you should have.

This sounds like a good time to figure out how to dual out the truck
would give you a bigger footprint to spread out the weight....
would also look cool as heck !!

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08 CrewMax salsa red.
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Valves, Valves, Valves.
There are hundreds, and they cause much confusion, and problems when the incorrect ones are installed.
I have seen many wheels come with incorrect valves. This goes for auto, LT, motor homes and the worst, travel trailers.

This is the standard valve that's been out since Columbus landed.
This valve is only good for up to 50psi. Suitable for up to and including most 6ply tires.




This is another rubber valve (what, I think, volley was speaking of) that's not as well known.
This valve will handle the high pressures from todays 10ply light truck tires.





Here's a few others. We must stock and sell at least a hundred different valves.

Are any of you Tundra owners running E rated tires with stock Toyota wheels and stock Toyota TPMS stems? If so, have any of you run the psi up to 65 or 80 psi and what have you experienced?

From the feedback so far, it doesn't sound like anyone has done this yet or the ones that have just haven't seen this thread yet.

I'd like to here from someone who has actually done this on their Tundra.

Sorry 2on, I'm running "P" rated tires.
I know there are many here using 10 ply tires. How many have run 80psi, I don't know.
I suspect some have. Referencing your earlier post. I don't think your TPMS valves will fail using 80 psi. What I mean is, I think they will hold your air pressure. I can't tell you, and I don't think anyone else can for sure, whether or not they will function properly being so far out of spec. I'm sure some of the other that have done will jump in soon and give their experiences.

Thanks for the input.

It is always good to here from those who have actually done it. I might just stay with the stock P rated tires that came on my truck, but I have always thought more capacity is better. Maybe I'm wrong. Maybe I should just leave the stock tires, P275x65x18, on the truck.

Does anyone know if the "Rock Warrior" package for the Tundra comes with "D", or "E" rated BFG 285x70x17 tires? Do the Rock Warrior TPMS valve stem sensors have a different part number than the TRD Off Road TPMS valve stem sensors? If they are the same you could assume higher pressure shouldn't make any difference unless the computer in the Rock Warrior Tundra is programmed differently than the ones with the TRD Off Road package.