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e-rated tire pressure

Discussion in '3rd Gen. Tacomas (2016+)' started by Teal_6, Jan 14, 2021 at 7:21 AM.

  1. Jan 14, 2021 at 7:21 AM
    #1
    Teal_6

    Teal_6 [OP] Well-Known Member

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    So i've had my nitto ridge grappler LT285-70-17 e rated for 6 month and toyed with higher pressures. I did't realize the lift shop spec out E tires. But i've been running about 32 and still wasn't as pleased how rough they felt. So i tried the chalk test and it seems 28 is good on the front and looks like i could go lower than 26 in the rear. See the before and after videos here

    My tpms light is on even though the pressure is higher than tech stream. Any ideas? Besides swapping to like C rated. That's the eventual plan later this year unless there's a good solution to keep these.

    139187329_223853159213637_6369949727646896780_n.jpg
     
  2. Jan 14, 2021 at 7:33 AM
    #2
    Mace27

    Mace27 Well-Known Member

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    Did you do the lift and tires at the same time? If so, do you have the ability to swap back to stock tires? I did my lift first and 285/75r16 E Ridge Grapplers later. Running 32psi and didn't notice much of a ride difference when i changed tires.
     
  3. Jan 14, 2021 at 7:36 AM
    #3
    Teal_6

    Teal_6 [OP] Well-Known Member

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    I did do the lift, wheels, and tires at the same time. And my old wheels and tires are gone. I was running falken wildpeaks in 265/70/16 and changed to 17 when i lifted
     
  4. Jan 14, 2021 at 7:45 AM
    #4
    Mace27

    Mace27 Well-Known Member

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    I did the front lift 5100s stock coils, drove for a week. Then AALs, drove for 2 weeks, then tires. The ride really stiffened up with the AALs but that was expected. I did it this way after reading the horror stories on here about vibes and noises and wanted to be able to pinpoint any potential issues. Didn't have any.
     
    71tattooguy likes this.
  5. Jan 14, 2021 at 7:50 AM
    #5
    Teal_6

    Teal_6 [OP] Well-Known Member

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    Interesting. Yeah i ran into issues because what my shop chose to do with my lift. And many troubles with traction control that are almost resolved. But i am also running 5100 struts with 888 coils and a 1.5" rear block. But you did notice a rougher ride
     
  6. Jan 14, 2021 at 7:59 AM
    #6
    Mace27

    Mace27 Well-Known Member

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    Front rode same as stock, although i could the valving is different, just the rear stiffened. From the sound of it the 888s are stiffer even though they have a lower weight rating than stock.
     
  7. Jan 14, 2021 at 8:00 AM
    #7
    CT Yankee

    CT Yankee Well-Known Member

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    Only aesthetic mods so far Leer 180 cap & Clazzio covers on order.
    Did you set your tire pressures cold, then reset the TPMS system?
     
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  8. Jan 14, 2021 at 8:01 AM
    #8
    Teal_6

    Teal_6 [OP] Well-Known Member

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    I mean it is cold out but no i aired them down after driving 1/2 hour. Then did the chalk test.
     
  9. Jan 14, 2021 at 8:02 AM
    #9
    Sungod

    Sungod Well-Known Member

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    That is a shame they got you the Es when Cs are available in that size. Es are an acquired taste for sure.

    Don't waste your time with the chalk test. There is nothing scientific to it. As tempting as it is to go lower with the air pressure, resist the urge. Lower pressure = more heat. More heat = shorter tire life. The draw back to the increased pressure is that you get the rough ride. That is something that is almost unavoidable with Es. The only way you can improve it would be to throw another thousand pounds on to get the ride like you would in the 3/4 ton trucks they are designed for. I would go back to the shop and raise hell to get you the correct tires. I realize that there are some sizes that Ds and Es are unavoidable, but this particular size isn't. They should know better.

    As for your TPMS, did they reuse the factory sensors? You should be able to get techstream to sort it out yourself. There is a ton of information out there. Tonered has the most comprehensive info.
     
  10. Jan 14, 2021 at 8:03 AM
    #10
    dangeroso

    dangeroso Model citizen. Zero discipline.

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    I'm just impressed that someone actually did the chalk test.
     
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  11. Jan 14, 2021 at 8:05 AM
    #11
    Mace27

    Mace27 Well-Known Member

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    The chalk test is to ensure you have proper contact patch with the road. To much psi and the center of the tire wears, to low and the outside wears and creates excessive heat.
     
  12. Jan 14, 2021 at 8:10 AM
    #12
    Teal_6

    Teal_6 [OP] Well-Known Member

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    I wish i could but as its been 6 months i'm not sure i could do that. I already rose hell and got them to fix the lift and they did that free. Yes i did reuse the factory tpms sensors. How do i use techstream to sort it out. I was trying to click around but couldnt figure out how to change the tpms settings.

    Lol i did search around and after seeing lots of people say to chalk test i chose to do that before asking questions.
     
    Last edited: Jan 14, 2021 at 8:40 AM
  13. Jan 14, 2021 at 8:48 AM
    #13
    Sungod

    Sungod Well-Known Member

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    Unfortunately that isn't actually how it works and it why there is nothing scientific about it. No one should waste their time putting chalk on their tires.
     
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  14. Jan 14, 2021 at 9:17 AM
    #14
    Mace27

    Mace27 Well-Known Member

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    Look dude, I know your trying to start an argument its what you do in every post. It doesn't need to be scientific to work, the chalk test is giving you a ball park on the correct psi to run your tires at.
     
  15. Jan 14, 2021 at 9:21 AM
    #15
    Teal_6

    Teal_6 [OP] Well-Known Member

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    Yes no arguments on my post. Just looking for help and suggestions. Thanks for those that have. Still curious as to how to use techstream to adjust the factory tpms
     
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  16. Jan 14, 2021 at 9:24 AM
    #16
    Mace27

    Mace27 Well-Known Member

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    @tonered
    He might know. Thats out of my wheelhouse.
     
    tonered and Teal_6 [OP] like this.
  17. Jan 14, 2021 at 9:33 AM
    #17
    tonered

    tonered tacorider

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    Looking at your pic, I'm not sure why you would have a light, unless there is a factor applied to the threshold?

    My best suggestion would be to set the pressures cold and hold the TPMS reset button under the steering wheel. That should drop the thresholds down further.
     
  18. Jan 14, 2021 at 9:36 AM
    #18
    Teal_6

    Teal_6 [OP] Well-Known Member

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    Thank you i will give that a shot. I wasn't even sure why techstream showed about 2psi less but regardless Tommorow i will add air in the morning while plugged into techstream.
     
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  19. Jan 14, 2021 at 9:41 AM
    #19
    tonered

    tonered tacorider

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    There is going to be some variance between your gauge and the sensors. Just the nature of the beast. Only a gauge calibrated to a standard will tell you something close to accurate.

    Speaking of, if you haven't seen it, @Shellshock has a sweet little deflator / inflator set up that is easy to make:
    https://www.tacomaworld.com/threads/shellshocks-diy-inflator-deflator.613122/
     
    Last edited: Jan 14, 2021 at 9:47 AM
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  20. Jan 14, 2021 at 9:45 AM
    #20
    splitbolt

    splitbolt Well-Known Member

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    I don't understand how swapping to Cs will make the TPMS problem to go away.
    You plan to run more PSI in the Cs?
     

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