1. Welcome to Tundras.com!

    You are currently viewing as a guest! To get full-access, you need to register for a FREE account.

    As a registered member, you’ll be able to:
    • Participate in all Tundra discussion topics
    • Transfer over your build thread from a different forum to this one
    • Communicate privately with other Tundra owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

How to determine your new air pressure with LT Tires.

Discussion in 'Wheels & Tires' started by Scuba, Nov 16, 2019.

  1. Nov 16, 2019 at 3:51 PM
    #1
    Scuba

    Scuba [OP] Sober member

    Joined:
    Oct 13, 2018
    Member:
    #20508
    Messages:
    1,248
    Gender:
    Male
    Austin, Tx.
    Vehicle:
    2012 Texas Edition CM.
    Ladies and Gents,
    I see this question come up fairly regularly and I figured with a little write up and the right info I can help you determine your new air pressure after switching tire sizes and/ or type.

    Disclaimer: I am acting and writing as a single entity and not as a part of any company. I use this information as a guide to help you find the minimum correct air pressure in your new tires. I am not getting paid to write this and this is not an advertisement for any company. I am not responsible for over or under pressurization of your tires or the potential side effects that come with it. I am sharing public information with you. This info was taught to me while working in the tire industry.
    Also please note: just because your new LT tires can carry more weight than your p-metric tires, that does not mean your GVWR, payload rating, tongue weight rating or towing capacity has increased. Do not exceed manufacturers limits for said specifications.

    Okay, now that thats out of the way lets get to the nitty gritty. We all know that the chalk test is good to see if your tire has an optimized patch/ tread wear. But, that's not what tire pressure is about. Tire pressure is about supporting your vehicle at max GVWR. I am here to get you to the minimum recommended tire pressure to support your vehicle at max GVWR. What you air your tires up to after that is completely up to you. The charts we use are in 5PSI increments for the LT tires. I do not know where/ how to find the PSI for exact pressures in between the 5PSI increments. LT and XL rated tires will carry less weight at the same PSI as a P-metric tire. As such, when switching to an LT or XL tire careful consideration is needed and you will more than likely need a much higher tire pressure than your original tires.

    Tire pressure charts:
    I mainly use this one..
    https://static1.1.sqspcdn.com/static/f/589830/23447320/1378330097907/Discount+Tire+inflation.pdf

    Toyo has this PDF but it's a long read. It does fill in some gaps of the above chart.
    https://www.toyotires.com/media/2125/application_of_load_inflation_tables_20170203.pdf

    You also need to reference your door jamb manufacturer sticker. This is the actual vin sticker from my truck.
    IMG_7917.jpg


    Example 1.
    My vehicle is a 2012 Toyota Tundra Crewmax SR5 2WD.
    The vehicle was manufactured with P255/70R18 112T tires aired up to 30F/33R.
    https://www.amazon.com/Michelin-LTX-All-Season-Radial-Tire/dp/B00G4TUOFM
    The tires load rating is 112 and it is a Standard Load tire.
    When I find that on the first page of the chart, we see that a 112SL tire will hold 2117 pounds at 30PSI and 2290 pounds at 33PSI. Total weight carrying capacity of all 4 tires is 8,814 pounds or 4234 front and 4580 rear.

    Lets say my new tires are the 275/60R20 LT D Range 119/116S BFG Ko2. For single real wheel trucks we only worry about the first load range: 119.
    https://www.bfgoodrichtires.com/all-tires/all-terrain-t-a-ko2.html
    We need to find on the chart at what psi this tire will hold the same or more weight than the OE tire. For this specific tire it will exceed 2171 pounds at 45PSI by carrying 2330 pounds for the front. For the rear it needs 50PSI to exceed 2344 pounds and at that pressure it will hold 2535 pounds. Total weight carrying capacity of all 4 tires is 9,730 pounds or 4660 front and 5070 rear. 45 PSI front and 50 PSI rear would be your recommended minimum tire pressure to support the same weight that Toyota decided your tires need to support.


    Example 2. This is a more general example.
    Lets say you have a 2016 Tundra TRD Offroad.
    It comes with 275/65R18 Michelin LTX AT2 114T Standard load.
    https://www.michelinman.com/all-season-tires/ltx-a-t-2.html
    The door placard says 30PSI Front and 33PSI rear..
    This tire holds 2226 pounds at 30PSI and 2410 pounds at 33PSI rear.

    Lets say you stay with the same size but go to the LT 275/65R18 Nitto Ridge Grappler E Range 123/120Q. Again, we only worry about the first listed load range of 123.
    https://www.nittotire.com/light-truck-tires/ridge-grappler-light-truck-tire/
    To exceed 2226 for the front, the Nitto will need 55PSI and will hold 2335 pounds at that pressure. For the rear you would need 60PSI to hold 2480.
    So your new tire pressure should be 55PSI front and 60PSI rear in order to support the same weight as your factory tires.

    Again, this is just a guide. I am not an expert but I have lived and breathed tires for the last 5.5 years and counting. Please do not hesitate to ask any questions.

    Thanks for reading and happy inflating. :thumbsup:
     
    Last edited: Nov 21, 2019
    chugs, MS22, Jtundra81 and 15 others like this.
  2. Dec 27, 2019 at 6:14 PM
    #2
    Zero One Actual

    Zero One Actual Member among Members

    Joined:
    Oct 17, 2017
    Member:
    #10330
    Messages:
    2,281
    I have a 2019 CM on 285/75R18 Cooper AT3 XLTs. I think according to your math that I am running the wrong PSI. Where do I obtain the information for that tire?
     
    Last edited: Dec 28, 2019
  3. Dec 28, 2019 at 1:53 AM
    #3
    Scuba

    Scuba [OP] Sober member

    Joined:
    Oct 13, 2018
    Member:
    #20508
    Messages:
    1,248
    Gender:
    Male
    Austin, Tx.
    Vehicle:
    2012 Texas Edition CM.
    Trying to help but the misspelling: looks like you said Toyo but the “AT3 XLT” tells me Cooper so I’m gonna go with those. Correct me if I’m wrong.
    They are a 129E1 Tire.
    4AD70D05-DB4C-410B-B1B2-0075D3CB0613.jpg


    Page 23 of the second chart from my first post has the specs for that size.
    Here it is again. It says Dual and Single. Don’t forget to use the “single” weight numbers.
    https://www.toyotires.com/media/2125/application_of_load_inflation_tables_20170203.pdf
     
  4. Dec 28, 2019 at 7:24 PM
    #4
    Zero One Actual

    Zero One Actual Member among Members

    Joined:
    Oct 17, 2017
    Member:
    #10330
    Messages:
    2,281
    My phone hates me. Yes they are the Coopers. Thanks you!!
     
  5. Jan 3, 2020 at 5:12 AM
    #5
    yoshi82

    yoshi82 New Member

    Joined:
    Aug 21, 2017
    Member:
    #9176
    Messages:
    162
    Gender:
    Male
    First Name:
    DAVID
    HOUSTON
    Vehicle:
    2014 Silver Tundra SR5
    3in ToYtech lift on Tundra and 2.5in in the rear. Tow Mirrors. Toyota grill, and Front bumber. New 6in antenna. Repainted the stepping boards
    3AC51104-4EC7-4474-A231-1F575AE84D73.jpg I just install new tires n rims on my Tundra. One Big question they are 295/70R18 the wall says when cold it should be at 80pSI so should the tire be at 70PSI - 80PSI??? I have them at 50PSI but now I’m worry that it’s not enough air or I’m crazy. How many PSI do y’all run y’all’s tires at???
     
  6. Jan 3, 2020 at 5:28 AM
    #6
    purplenova

    purplenova Not a new member

    Joined:
    Nov 9, 2018
    Member:
    #21513
    Messages:
    705
    Gender:
    Male
    First Name:
    Tom
    Ohio
    Vehicle:
    2016 Tundra Crewmax SR5
    Pillar Tape, Bullet Liner, 20% Tint, Tyger Star Armor Kenwood amp & AudioControl LC7i Tech12volts JL Tweeters
    So if I read the chart correctly

    My Nokian Rotiiva AT Plus tires should be at 36psi ???

    Size LT275/70R18/E
    Serv Desc 125S
    Max Load 3638lbs
    Speed Rating S
    Max inflation 80psi
     
  7. Jan 3, 2020 at 5:35 AM
    #7
    SprinterAE86

    SprinterAE86 New Member

    Joined:
    May 19, 2018
    Member:
    #15447
    Messages:
    1,016
    Gender:
    Male
    First Name:
    Ian
    Charlottetown, PE, Canada
    Vehicle:
    2012 Toyota Sequoia Platinum
    Bilstein 5100 2.3/1.5, TRD sway bars ft/rr, Cooper Tires Discoverer AT3 XLT 295.70.18, Vision Manx 2 18x9 +12, APS side armor steps, TRD-Pro Grill and Bulge, de-chromed, blackout emblems, OEM mirror caps and flares, TRD shift knob, Leather wrapped steering wheel, All weather mats
    Wow, great info. I'm still 5/10 under with my E rated 123.

    Thanks!
     
  8. Jan 3, 2020 at 5:53 AM
    #8
    e30cabrio

    e30cabrio I'm e30cabrio, I'm a modaholic

    Joined:
    Oct 20, 2017
    Member:
    #10410
    Messages:
    1,275
    Gender:
    Male
    West Valley, Phoenix, Az.
    Vehicle:
    2010 Crewmax, 2013 Sequoia Limited
    Sequoia LED Headlights! D.T. L.T. headers, dual exh., BDX, S&B intake, 2018 seat skins.
    Very informative post. Thank you!
     
  9. Jan 3, 2020 at 6:54 AM
    #9
    Hbjeff

    Hbjeff New Member

    Joined:
    Jan 20, 2019
    Member:
    #24845
    Messages:
    3,669
    Gender:
    Male
    Huntington Beach
    Vehicle:
    2010 DC tundra lame-o 2wd
    Awesome post. These numbers are at gvwr right? Unloaded we can run lower?
     
  10. Jan 5, 2020 at 9:17 AM
    #10
    Scuba

    Scuba [OP] Sober member

    Joined:
    Oct 13, 2018
    Member:
    #20508
    Messages:
    1,248
    Gender:
    Male
    Austin, Tx.
    Vehicle:
    2012 Texas Edition CM.
    50 sounds about ballpark for an LT tire but if you post a picture of your vin tag and exact info of old and new tires I can get you closer

    Depends on the GVRW and what came on the truck originally. As mentioned above, if you post your vin tag and exact specs of the old tires I can get you close.

    Theoretically, I suppose so. But I really wouldn’t recommend it unless you have on board air. I would hate to be in an unexpected situation where I have to grab a trailer and then I’m searching for the next gas station that doesn’t have a broken air pump.

    The OE specs of 30/33 or 36 all around (or whatever it says on your placard) will support max GVWR with the OE tires. The method we use to get the new PSI will get you to the closest PSI that the new tires need to be at to handle max GVWR. It is up to you how you inflate them after all.
     
  11. Jan 5, 2020 at 12:36 PM
    #11
    SprinterAE86

    SprinterAE86 New Member

    Joined:
    May 19, 2018
    Member:
    #15447
    Messages:
    1,016
    Gender:
    Male
    First Name:
    Ian
    Charlottetown, PE, Canada
    Vehicle:
    2012 Toyota Sequoia Platinum
    Bilstein 5100 2.3/1.5, TRD sway bars ft/rr, Cooper Tires Discoverer AT3 XLT 295.70.18, Vision Manx 2 18x9 +12, APS side armor steps, TRD-Pro Grill and Bulge, de-chromed, blackout emblems, OEM mirror caps and flares, TRD shift knob, Leather wrapped steering wheel, All weather mats
    I usually do 45-50psi. I might start doing 55/60 now.
    20200105_153321.jpg Screenshot_20200105-152608_Chrome.jpg
     
  12. Feb 6, 2020 at 8:05 PM
    #12
    Mike Honcho

    Mike Honcho New Member

    Joined:
    Jan 6, 2020
    Member:
    #40847
    Messages:
    5
    Gender:
    Male
    Vehicle:
    2019 TRD Pro - black
    Linex, Weathertec mats front/rear, TRD air filter, Nitto Ridge Grappler 285/70 (34.5"), red bed stamp and tailgate inserts.
    Good info, however I believe you have missed a step. Below is excerpted from "Application of Load Inflation Tables Version 20170203":

    P-Metric or hard metric tires on Light Trucks

    When a P-metric or metric tire is installed on a light truck (SUV, pickup, minivan), the load capacity of the tire is reduced by a factor of 1.10 as prescribed by the Federal Motor Vehicle Safety Standards (FMVSS). For example, 305/50R20 has a maximum load capacity of 3086 lbs. If this tire is fitted to a light truck, then the actual allowable load capacity for the tire is 2805 lbs. (3086 lbs. divided by 1.1). If you replace the original tires with the exact same type (P-metric, hard metric, LT-metric, or flotation), size designations, and ply as the tires that were originally installed, just follow the vehicle’s tire information placard for proper inflation pressures. If, however, you apply a ‘Plus zero’ or plus-1, etc., fitment to a light truck, you must discount the replacement tire’s load by the 1.10 factor and ensure that the replacement tire has sufficient load capacity by inflation to support the load of the originally installed tires.

    With that said, if your truck is fitted with P tires, the manufacturer set the allowable load under what is listed in the chart, so by strictly using the listed number you may be slightly over inflating- not a big deal because you're actually safer that way. Just trying to get the info out there. I work for a national tire chain and you'd be amazed how obscure this knowledge is.
     
  13. Feb 15, 2020 at 11:43 AM
    #13
    chrisbusnut

    chrisbusnut New Member

    Joined:
    Sep 6, 2019
    Member:
    #35751
    Messages:
    248
    Gender:
    Male
    First Name:
    Chris
    Pasadena, CA
    Vehicle:
    2020 Tundra Crew Max SR5 4x4 w/TRD Off Road pkg
    DiamondBack bed cover, SDHQ sliders, SwitchPro, Katzkin leather seats, TRD Pro grille, TRD Pro wheels w/Nitto Ridge Grappers, Toyota OEM leather steering wheel, SSO Slimline Hybrid Bumper w/Baja Designs S8 light bar, Warn Zeon Platinum 10-S winch, Baja Design rock lights & flush mount rear bumper lights
    I have a 2020 TRD Off Road and am running 275/65R18 Ridge Grapplers on TRD Pro stock wheels. The tires state up to 50 PSI. I called my tire shop, and they recommended 40-45 PSI.

    I’m confused...

    B781EC43-4A45-43EB-97ED-21BCDAB25479.jpg 30C1E001-5EE5-432E-8756-2496C7B7B6FC.jpg 37AE7854-B86F-42E3-B98D-155B97A6375F.jpg 1C5A39E0-04A1-44FE-B08B-12DF89BF7C19.jpg
     
  14. Mar 2, 2020 at 4:57 PM
    #14
    Mike Honcho

    Mike Honcho New Member

    Joined:
    Jan 6, 2020
    Member:
    #40847
    Messages:
    5
    Gender:
    Male
    Vehicle:
    2019 TRD Pro - black
    Linex, Weathertec mats front/rear, TRD air filter, Nitto Ridge Grappler 285/70 (34.5"), red bed stamp and tailgate inserts.
    Your tires appear from the pictures to be P tires, so you should simply follow the door placard.

    If you were to transition to LT tires then, in your specific situation as an example, the following would apply. First, you need to determine the load index stated by factory tire and psi per your door placard. We're basically translating factory P275/65R18@30 (front) and 33(rear) psi into pounds. To do this you reference a load inflation table- I used "Application of Load Inflation Tables Version 20170203." You should have no trouble finding this via an internet search engine. In this table you will cross reference the stock tire size of P275/65R18 with the stock psi of 30(f) and 33(r). These values are 2502 and 2601 (32 psi was used for front and 35 for rear when cross referencing the tire size in the table as the table displays psi in increments of 3 starting at 29, 32 is the closest to 30 while still being over, same with 35 in place of 33 in the rear). So we now know Toyota intended each tire in the front to support 2502 lbs and each in the rear to support 2601 lbs.

    There is one catch- the following quote from the table- "P-Metric or hard metric tires on Light Trucks When a P-metric or metric tire is installed on a light truck (SUV, pickup, minivan), the load capacity of the tire is reduced by a factor of 1.101 as prescribed by the Federal Motor Vehicle Safety Standards (FMVSS). For example, 305/50R20 has a maximum load capacity of 3086 lbs. If this tire is fitted to a light truck, then the actual allowable load capacity for the tire is 2805 lbs. (3086 lbs. divided by 1.1). If you replace the original tires with the exact same type (P-metric, hard metric, LT-metric, or flotation), size designations, and ply as the tires that were originally installed, just follow the vehicle’s tire information placard for proper inflation pressures. If, however, you apply a ‘Plus zero’ or plus-1, etc., fitment to a light truck, you must discount the replacement tire’s load by the 1.10 factor and ensure that the replacement tire has sufficient load capacity by inflation to support the load of the originally installed tires."

    With this we know Toyota only intended the front tires to be capable of 2502÷1.10=2274.54 lbs and the rear to be capable of 2601÷1.10=2364.54 lbs. We now take these values back to the chart and cross reference with a new tire size of LT285/70R18 to determine what tire pressure will hold AT LEAST the same weights we just determined.

    35 40 45 50 55
    LT285/70R18 Single 2180 2395 2600 2835 2995

    Now you choose a psi that corresponds to the amount of weight or more to ensure you do not decrease the payload of your truck as manufactured. In this case, 35 psi in front would be 2180 lbs, which is less than the 2274 lbs Toyota intended on the front axle- I would recommend 40 in order to be rated at 2395 lbs.

    These in no way take into account fuel mileage, wear, or ride quality. This is strictly what psi you need to run in order to maintain factory payload ratings.
     
    Terndrerrr likes this.
  15. Mar 9, 2020 at 4:39 PM
    #15
    Mredthe7th

    Mredthe7th New Member

    Joined:
    Feb 25, 2018
    Member:
    #13127
    Messages:
    1
    Gender:
    Male
    I've never been accused of being smart... but I'm missing something. 2017 Tundra Crewmax 4x4, original tires are Michelin LTX M/S2 All-Season Radial Tire - 255/70R18 112T, factory 30psi front, 33psi rear. Will be installing
    DISCOVERER AT3 XLT LT275/70R18 125\122S E tires. If I read the "Discount Tire Pressure" chart for load rating "E" it shows only a single psi of 80psi @ 3638 lbs for load factor 125 tires. That doesn't seem correct... what am I missing?
     
  16. Apr 19, 2020 at 6:45 PM
    #16
    linwozzle

    linwozzle New Member

    Joined:
    Mar 12, 2020
    Member:
    #43870
    Messages:
    133
    Gender:
    Male
    First Name:
    Linden
    Houston, TX
    Vehicle:
    2014 SW Tundra Platinum 4x4 CM
    This website can give you an estimate for changing to different tire load ratings
     
    Beeb likes this.
  17. Jul 10, 2020 at 2:02 PM
    #17
    Rocco2Gen

    Rocco2Gen New Member

    Joined:
    May 5, 2020
    Member:
    #45957
    Messages:
    17
    Gender:
    Male
    First Name:
    Rocco
    Vehicle:
    2007 Tundra TRD
    Ekstrom Design Tundra +2" Shackles Polyurethane Bushing Kit Tundra Front Shi, (left corner) Tundra Couchbuilder Steering Kit Bilstien 6112 (Front) Bilstien 5160 (Rear) Raceline Upper Control Arm (4) 18x9 XD778 Blk +35 (4) 275/65/18 Nitto Terra w/lugkit '07 Tundra Ship TRD REAR SWAY BAR KIT 07 Weather Tech Mats TRD Air Intake Borla Exhaust Fog Lights
    Can I ask for your help please.
    Would these guidelines apply to my Tundra:
    LT285/70R18 Nitto Ridge Grapplers

    35 40 45 50 55
    LT285/70R18 Single 2180 2395 2600 2835 2995

    Tire Pressure.jpg
     
  18. Jul 10, 2020 at 2:32 PM
    #18
    Ace402

    Ace402 New Member

    Joined:
    Apr 23, 2018
    Member:
    #14679
    Messages:
    389
    Vehicle:
    2011 Tundra 4x4 SR5
    ADS 2.5 RR front and rear. MCM UCA & Shackles
    Thanks for this! Huge help!
     
  19. Jul 10, 2020 at 3:00 PM
    #19
    14burrito

    14burrito IG @14burrito

    Joined:
    Dec 14, 2014
    Member:
    #798
    Messages:
    3,315
    Vehicle:
    2014 SR5 CM 4x4 5.7
    @ADSracingshocks - F 3 point ohh / R 2.5 - w/clickers @camburgracing - uniball UCA @rigidindustries - 40" amber/white split, Dually XL, D2 @coopertires - 35/12.5/17 STT MAXX @bayareametalfab - low pro bed rack @toyotausa - 17" rock warrior @sdhqoffroad - rock sliders, a-pillar @hondogarage / @apple / @gaiagps / @dualgps- navigation @wheelersoffroadinc - superbumps
    And people think I'm crazy when I do the math.

    Quick way to do math knowing basic specs about your tires.

    Let's say the truck weighs 5500lbs.

    Load range E tire, 3195lbs @65psi.

    So,

    3195lbs x 4 tires = 12780lbs

    5500lb / 12780lb = .43 or 43%

    65psi x 43% = 28psi

    Quick, dirty, easy baseline and obviously circumstances between vehicles is different, so slight alterations may need to be done further.

    Screenshot_20200710-145711_Chrome.jpg
     
  20. Jul 10, 2020 at 3:00 PM
    #20
    Rocco2Gen

    Rocco2Gen New Member

    Joined:
    May 5, 2020
    Member:
    #45957
    Messages:
    17
    Gender:
    Male
    First Name:
    Rocco
    Vehicle:
    2007 Tundra TRD
    Ekstrom Design Tundra +2" Shackles Polyurethane Bushing Kit Tundra Front Shi, (left corner) Tundra Couchbuilder Steering Kit Bilstien 6112 (Front) Bilstien 5160 (Rear) Raceline Upper Control Arm (4) 18x9 XD778 Blk +35 (4) 275/65/18 Nitto Terra w/lugkit '07 Tundra Ship TRD REAR SWAY BAR KIT 07 Weather Tech Mats TRD Air Intake Borla Exhaust Fog Lights
    You are right - huge help!

    Per door lable (above)
    Front OEM Size (P275/65R18 SL) Load Capacity: 2421 lbs. @ 30 psi.
    Rear OEM Size (P275/65R18 SL) Load Capacity: 2535 lbs. @ 33 psi.

    My new tires
    Front New Size (LT285/70R18 E) Load Capacity: 2223 lbs. @ 36 psi.
    Rear New Size (LT285/70R18 E) Load Capacity: 2309 lbs. @ 38 psi.

    Passenger type tires are fitted with a 10% overage in load capability when used on SUV's, Light Trucks, and Vans because of the difference in load handling. This load overage can be removed when changing to an LT type tire.
    This load overage can be removed when changing to an LT type tire.
    That brings the effective load capacity to achieve down to 2201 lbs.

    So towing a Winnebago 16ft trailer at a dry weight of 3705 lbs - I need not make any tire pressure changes - agree?
    If I load up an additional 1000 lbs - I would inflate to 45 psi per the following data I believe applies to me.

    LT285/70R18 Single
    PSI 35 40 45 50 55
    Weight 2180 2395 2600 2835 2995

    Do we agree these are good guidelines?
     
  21. Jul 10, 2020 at 3:44 PM
    #21
    Rocco2Gen

    Rocco2Gen New Member

    Joined:
    May 5, 2020
    Member:
    #45957
    Messages:
    17
    Gender:
    Male
    First Name:
    Rocco
    Vehicle:
    2007 Tundra TRD
    Ekstrom Design Tundra +2" Shackles Polyurethane Bushing Kit Tundra Front Shi, (left corner) Tundra Couchbuilder Steering Kit Bilstien 6112 (Front) Bilstien 5160 (Rear) Raceline Upper Control Arm (4) 18x9 XD778 Blk +35 (4) 275/65/18 Nitto Terra w/lugkit '07 Tundra Ship TRD REAR SWAY BAR KIT 07 Weather Tech Mats TRD Air Intake Borla Exhaust Fog Lights
    14burrito - are trying to tell me that you will run your tires at 28 psi if no load?
     
  22. Jul 10, 2020 at 5:44 PM
    #22
    Stumpjumper

    Stumpjumper New Member

    Joined:
    Sep 15, 2016
    Member:
    #4546
    Messages:
    2,712
    Gender:
    Male
    Fate, Tx
    Vehicle:
    2017 Tundra TSS 4x4
    OEM BFG KO2s D rated on mine and Toyota recommends 46 psi. In fact if i run less my TPMS light comes on. I run 50 in them. 285/55/20
     
  23. Jul 24, 2020 at 10:30 AM
    #23
    Beeb

    Beeb New Member

    Joined:
    Jun 17, 2020
    Member:
    #48092
    Messages:
    2
    Vehicle:
    2000 Black Tundra
    Can someone please help me? lol... this is all Greek to me.
    I bought the truck with new tires already installed, and I'm going on a long-distance road-trip tomorrow (Florida to New Mexico), so I want to make sure my tires are the right pressure.

    Truck is a 2000 Tundra Limited

    Factory recommended:
    FRT 3160 with P265/70R16 TIRES 16x7JJ RIMS AT 26 PSI COLD
    RR 3960 with P265/70R16 TIRES 16X7JJ RIMS AT 29 PSI COLD

    New tires:
    LT295/75R16 123/120Q LOAD RANGE D, MAX PSI 65
    MAX LOAD: 3415LB AT 65PSI COLD

    Based on , it says tires should be 35psi. Previous owner had them at 51psi, and they LOOK fine... but I don't really know what I'm talking about. Just want to make sure that site is calculating it correct.
    Need to be able to leave at 7am tomorrow. Anyone able to help me figure this out so I can be safe?
    Thanks! :help::help::help:

    edit: Correct new tire size is 75R, not 73R... typo.
     
  24. Sep 23, 2020 at 8:06 PM
    #24
    JackwagonJim

    JackwagonJim New Member

    Joined:
    Aug 7, 2020
    Member:
    #50479
    Messages:
    89
    Purlear, NC
    Just found this. Great info. Looks like i need to add a few psi to my rears!
     
  25. Sep 25, 2020 at 8:58 AM
    #25
    vl184009

    vl184009 Cheers Boys!

    Joined:
    Jun 29, 2017
    Member:
    #8326
    Messages:
    1,002
    Gender:
    Female
    First Name:
    Vicky
    Southern, Ca.
    Vehicle:
    2016 MGM CM SR5 4x4 w/Tow Pkg
    I'm so confused! :confused:
     
  26. Sep 25, 2020 at 9:59 AM
    #26
    Hbjeff

    Hbjeff New Member

    Joined:
    Jan 20, 2019
    Member:
    #24845
    Messages:
    3,669
    Gender:
    Male
    Huntington Beach
    Vehicle:
    2010 DC tundra lame-o 2wd
    ask away. I think psi is confusing as it not vehicle specific but rather tire construction specific for a given weight
     
  27. Sep 28, 2020 at 7:39 PM
    #27
    Blueknights75

    Blueknights75 040 IS THE FASTEST

    Joined:
    May 13, 2018
    Member:
    #15276
    Messages:
    4,144
    Gender:
    Male
    First Name:
    Ron
    Clayton, NC
    Vehicle:
    18’ TRD CM leveled with 295/70 Ridge Grapplers
    Ok...I will play and see what you think. Recently got 295/70/18 LT Ridge Grapplers. Discount tire says that they should be set at 35(seems low to me) the shop I got the tires from and installed recommended and set them at 50. Maybe I will just meet in the middle of the two at 42??
     
  28. Nov 12, 2020 at 9:46 AM
    #28
    AZBoatHauler

    AZBoatHauler ASCM#3 Desert Dweller

    Joined:
    Aug 13, 2019
    Member:
    #34576
    Messages:
    2,045
    Gender:
    Male
    First Name:
    Adam
    Arizona
    Vehicle:
    2017 CM LTD TRD 4x4 MGM
    6112 and 5160 w/ CB +2, JL Audio with Kenwood HU, DD 10" Exhaust, RC light bar BD fogs, Platinum LED headlights, RCI skids, WKOR sliders otw
    That sounds reasonable. I reached out to Nitto and this was the response I received for 275/70/18 LT Ridge Grapplers -

    "Thank you for contacting Nitto Tire.



    Based on the information provided, the calculated pressure for your tires is 38 PSI cold pressure on the front tires and 41 PSI cold pressure on the rear tires.


    (NOTE: Although the email indicates a “noreply” email address, function for correspondence is available and photos or documents can also be added as attachments.)


    Thank you,

    Nitto Technical Services Department


    Nitto Tire U.S.A

    Fueled by Enthusiasts"

    When I know I'm going to be towing or hauling I bump it up to 45ish.
     
    Blueknights75 likes this.
  29. Nov 12, 2020 at 11:03 AM
    #29
    14burrito

    14burrito IG @14burrito

    Joined:
    Dec 14, 2014
    Member:
    #798
    Messages:
    3,315
    Vehicle:
    2014 SR5 CM 4x4 5.7
    @ADSracingshocks - F 3 point ohh / R 2.5 - w/clickers @camburgracing - uniball UCA @rigidindustries - 40" amber/white split, Dually XL, D2 @coopertires - 35/12.5/17 STT MAXX @bayareametalfab - low pro bed rack @toyotausa - 17" rock warrior @sdhqoffroad - rock sliders, a-pillar @hondogarage / @apple / @gaiagps / @dualgps- navigation @wheelersoffroadinc - superbumps
    Unloaded I run between 30 and 35 psi
     
    chugs likes this.
  30. Nov 12, 2020 at 12:27 PM
    #30
    Johnsonman

    Johnsonman New Member

    Joined:
    Nov 25, 2019
    Member:
    #39132
    Messages:
    790
    Gender:
    Male
    Austin
    Vehicle:
    Sequoia
    LED headlamps/fogs; interior footlamps.
    Thanks for the info, seems I'm running a little low...
     

Products Discussed in

To Top