1. Welcome to Tacoma World!

    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 Tacoma discussion topics
    • Communicate privately with other Tacoma owners from around the world
    • Post your own photos in our Members Gallery
    • Access all special features of the site

What psi should i run?

Discussion in 'Wheels & Tires' started by TacoTRD420, Sep 10, 2009.

  1. Aug 3, 2014 at 5:49 PM
    #121
    White Ball

    White Ball Member

    Joined:
    Jul 21, 2014
    Member:
    #134370
    Messages:
    8
    Gender:
    Male
    Central SC
    Vehicle:
    '13 TRD Sport DCLB 4x4
    Bak F1 / Western Bull Bar
    Adding to above:
    If your tires and rim width are not matched up correctly, neither the calk method nor the math method will likely give you correct PSI readings.
     
  2. Sep 13, 2014 at 2:53 PM
    #122
    jca1386

    jca1386 Active Member

    Joined:
    Jul 28, 2014
    Member:
    #134865
    Messages:
    33
    Gender:
    Male
    First Name:
    Joe
    South Central CT
    What Im gathering here from reading all the info (which is absolutely effing awesome) is that if I have a stock 14 DBL Cab with the BFG's that toyota installs should be 29/32 according to the door. I checked mine today with 600 miles on the truck and i was at about 40 all around on a relatively cold tire. Do you guys recommend going to the 29/32 pressures, driving around and adjusting from there? I do about 50/50 between highway and city...

    Thanks for the help!
     
  3. Sep 14, 2014 at 3:50 AM
    #123
    toendanger

    toendanger Well-Known Member

    Joined:
    Nov 12, 2013
    Member:
    #116470
    Messages:
    1,309
    Gender:
    Male
    First Name:
    Harlan
    Maricopa, Az
    Vehicle:
    01 ext cab prerunner
    40 is way too high. Especially if it was cold, with heat from the friction and from daytime your pressures gonna be even higher than that. Take em down right away. From what I hear (I forget why) but dealers tend to keep their tires up a bit higher than normal for the cars on the lot. But if they installed newer tires since you bought the truck, kinda odd they would put them that high. Max pressure is probably 35 on those! I just fail to understand why people do this at tire shops and have no clue about proper tire pressures. Or fail to read the Damn tire to see what max is and make a judgement off that alone on pressure. Really surprised Toyota put them at 40! Wtf! That's why I ALWAYS check my tire pressure if I have any shop service my tires. And if it's ridiculously high I make it a point to go back in and explain what happened.
     
  4. Sep 14, 2014 at 8:47 AM
    #124
    Ostrichsak

    Ostrichsak Don't taze me bro!

    Joined:
    Apr 5, 2012
    Member:
    #76327
    Messages:
    8,211
    Gender:
    Male
    First Name:
    Jer
    Northern Colorado, USA
    Vehicle:
    Supercharged '10 Tacoma 4x4 TRD
    TRD Supercharger, aFe CAI (same as TRD 1st gen) w/Dry Filter, URD 2.85" Stealth Pulley, custom exhaust system, 5100's front & rear, TSB rear springs, 55 watt Xenon HID hi/lo 4500k Headlights, 35 watt 3000k yellow fog lights, fogs on w/headlights mod in sig, tinted side windows & windshield, Kenwood Navigation Unit, 5mm wide-angle flush mount LEDs in orange tied into illumination circuit to light up all storage & cubby areas at night, DEI Alarm, remote start w/cell phone control that works from anywhere, Custom electric roof mount rifle rack for LMT AR15
    Funny that your bring up the subject of tire pressure and dealerships....

    Just last week the low tire pressure sensor in our Optima (in my sig pic below) came on. I keep a good eye on tire pressure in all of my vehicles (probably the most important factor to MPG and safety that 99% of drivers don't bother ever checking) so I know that they're all within 1-2psi of target pressure & each other unless there's an issue. The wife (also in the sig pic below) told me the light was on so I checked all the tires immediately and, as expected, 34.5-35psi all the way around. Evened them all to exactly 35psi resting temp at a moderate ambient air temp and then went to the spare. It was 52psi when the tire calls for 60psi so I was confident this was the problem and put the extra 8psi in it. The next day my wife drove to work and the light still hadn't gone off so she called the dealership to schedule a service appointment for a potentially bad sensor. The service manager (yes, manager) told her that tire pressure can vary greatly and she should just put 39psi in all of her tires and she'll be fine. 39psi. Mind you we live in Colorado and the day she called the high temp was an unseasonably cold 55 degrees. This means that if she fills them to 39 psi cold during a 55deg day her likelihood of a blowout at highway speeds when it's nearly 100deg increases dramatically. This is very dangerous advice they're volunteering to customers who call to schedule appointments to check a TPMS. I can't believe this is what the service manager of all people is telling people who call. Fortunately I know better but most who call would not. That very day the light reset itself when she left for lunch so fortunately we weren't forced to take the car into that dealership. Just a little side story to showcase how trustworthy a dealership should be when it comes to matters such as tire pressure.
     
  5. Oct 3, 2014 at 9:34 PM
    #125
    Tdkrum5

    Tdkrum5 Active Member

    Joined:
    Aug 12, 2014
    Member:
    #135966
    Messages:
    44
    Gender:
    Male
    First Name:
    Ted
    Olympia, Wa
    Vehicle:
    14 DC TRD OR 4x4
    After reading this thread i went out and checked the tires of my new 14 DCSB TRD OR. Tires were cold. You were right they were all set at 40 psi. Sticker says front 29, Rear 32. I set the front at 32 rear at 34. We will see how they ride and wear. What do you all air down to while out wheeling?
     
  6. Oct 8, 2014 at 6:59 PM
    #126
    2012txpro

    2012txpro New Member

    Joined:
    Jan 18, 2013
    Member:
    #95511
    Messages:
    4
    Gender:
    Male
    First Name:
    Chris
    Elma, NY
    Vehicle:
    2012 tX Pro
    Just got a recall on my 2012 txPro that is changing the air pressure in my tires from 29/32 to 42 all the way around!! Sent me a new door sticker and everything. What do you guys think of this?
     
  7. Dec 5, 2014 at 5:04 AM
    #127
    BCephus

    BCephus Alright then

    Joined:
    Oct 28, 2013
    Member:
    #115459
    Messages:
    72
    Gender:
    Male
    First Name:
    Slingblade
    Virginia
    Vehicle:
    08 DCabSB 6 speed OME'd
    OME 886/dakar heavy, ARB bumper, 9.5XP warn, PDM tranquil kit, custom bullet hole tailgate anti theft kit, Camburg ball joint UCAs, Centerforce II clutch, FJ cruiser TRD wheels (black) with 285/75/16 Ds (white letters out, (Duh))
    I prefer the duct tape method. Clean the tires and tape a strip of duct tape all the way across the tread down to the wheel (but not on it). You can get a better composite by driving a really long ways compared to chalk, plus you can reach highway speeds where the tire changes shape due to centripetal force. I ended up at 38 front and 30 or so rear when not towing. My wheels are 7.5s and on the narrow side for 33s.
    Not responsible for goo left by gorilla tape on a hot day.

    BFG publishes the recommended wheel width for a given size tire. The narrow end of the wheel width spectrum tends to wear in the middle more vs wider wheel at the same pressure, BUT your wheels are a little better protected by the bigger sidewall bulge.
     
    Last edited: Dec 5, 2014
  8. Jan 2, 2015 at 9:53 PM
    #128
    mightytacoman

    mightytacoman Well-Known Member

    Joined:
    Apr 3, 2013
    Member:
    #101270
    Messages:
    244
    Gender:
    Male
    First Name:
    kelby
    new york
    Vehicle:
    09 pyrite upgraded
    windows tinted 25%, sony stereo, 12" subwoofer, 1000 watt 2 channel amp, on-board air, retrofit headlights with legal demon eye, kryptek marathon seat covers, helo 791 rims, 315/75/r16 mt/r, 5100 at 0 and OME 886, 1/2" spacers in front, 1/4" spacer drivers side, Dakar leak pack, brute force fab front bumper galvanized and powder coated, DTRL mod, yellow fogs, fog anytime mod, relocated rear differential breather, synthetic fluid swap, afe drop in dry filter, secondary air filter removed, airflow snorkle, 4x innovation sliders powder coated, aero turbine 2525xl exhaust dumped over axel, seat belt chime disabled, warn 8000i winch, 2- 20" light bars, custom light bar bracket, mesh grill, brute force fab rear bumper with extra reverse lights, u bolt flip kit, SS extendend brake lines, hockey puck bump stop extension, AT shackle flip kit, light racing UCA's, 4crawler 1.5" bodylift. custom built front and mid skid plates, regeared to 4.56s
    Quick question and to revive a dead thread.. When you go up in tire size - say 265/75r16 to 315/75r16. How would one expect that to change the "perfect" tire pressure? Would the sweet spot increase or decrease or stay the same. Thanks
     
  9. Jan 10, 2015 at 9:51 PM
    #129
    supremetaco2

    supremetaco2 Well-Known Member

    Joined:
    Jul 9, 2009
    Member:
    #19500
    Messages:
    1,107
    Gender:
    Male
    concrete jungle, oahu
    Vehicle:
    04inacoma
    +hp, lifted, lights, dif breather mod, debadged, shorty antenna...
    Another question... With more added weight in the front, such as a steel bumper (100lbs+) is it better to run a higher pressure in the front? Thanks
     
  10. Jan 10, 2015 at 9:54 PM
    #130
    Ostrichsak

    Ostrichsak Don't taze me bro!

    Joined:
    Apr 5, 2012
    Member:
    #76327
    Messages:
    8,211
    Gender:
    Male
    First Name:
    Jer
    Northern Colorado, USA
    Vehicle:
    Supercharged '10 Tacoma 4x4 TRD
    TRD Supercharger, aFe CAI (same as TRD 1st gen) w/Dry Filter, URD 2.85" Stealth Pulley, custom exhaust system, 5100's front & rear, TSB rear springs, 55 watt Xenon HID hi/lo 4500k Headlights, 35 watt 3000k yellow fog lights, fogs on w/headlights mod in sig, tinted side windows & windshield, Kenwood Navigation Unit, 5mm wide-angle flush mount LEDs in orange tied into illumination circuit to light up all storage & cubby areas at night, DEI Alarm, remote start w/cell phone control that works from anywhere, Custom electric roof mount rifle rack for LMT AR15
    With the same air volume in your tires added weight will increase tire pressure.
     
  11. Jan 11, 2015 at 1:26 PM
    #131
    BCephus

    BCephus Alright then

    Joined:
    Oct 28, 2013
    Member:
    #115459
    Messages:
    72
    Gender:
    Male
    First Name:
    Slingblade
    Virginia
    Vehicle:
    08 DCabSB 6 speed OME'd
    OME 886/dakar heavy, ARB bumper, 9.5XP warn, PDM tranquil kit, custom bullet hole tailgate anti theft kit, Camburg ball joint UCAs, Centerforce II clutch, FJ cruiser TRD wheels (black) with 285/75/16 Ds (white letters out, (Duh))
    It sure will. That weight is cantilevered, so it acts like even more weight. Just like towing, you would add air to keep the tread profile where it needs to be. I ended up like 6 lbs more in the front with ARB and winch.
     
  12. Mar 21, 2015 at 3:53 PM
    #132
    olddriver

    olddriver New Member

    Joined:
    Mar 19, 2015
    Member:
    #151295
    Messages:
    4
    Gender:
    Male
    So I got a 1st gen. Tacoma (2003) from my son. It's got 215x70x15 tires on it. What??? That's not a truck tire size. He laughs and says that if I want real tires I'll have to spend my own money and buy a whole set of wheels and tires. Even my wifes Hyundai has bigger tires. The 215's I have now are running at 35lbs all around and the sticker for the stock 205x75x15's suggest 29lbs all around. 205's to 215's doesn't seem to be much of a difference. One tire guy suggested 32's all around but this is suppose to be a truck not a car. And yes with these radial car tires - it does handle like a car. Even my old Ford Courier and B2000 handled better. So, reduce pressure or leave it?
     
  13. Mar 23, 2015 at 6:51 AM
    #133
    BCephus

    BCephus Alright then

    Joined:
    Oct 28, 2013
    Member:
    #115459
    Messages:
    72
    Gender:
    Male
    First Name:
    Slingblade
    Virginia
    Vehicle:
    08 DCabSB 6 speed OME'd
    OME 886/dakar heavy, ARB bumper, 9.5XP warn, PDM tranquil kit, custom bullet hole tailgate anti theft kit, Camburg ball joint UCAs, Centerforce II clutch, FJ cruiser TRD wheels (black) with 285/75/16 Ds (white letters out, (Duh))
    I think I remember those wheels being pretty skinny, like 6 inches. 35 sounds a little high. The wear pattern will let you know. If they are wearing in the middle, its too high. Since "I love me some" BFG A/Ts, that's what I would recommend when the current tires wear out. You will need a little wider wheel, and then put some 31x10.5 on there. If you have "P" tires on there now, going to a "LT" will make a big difference. Those BFGs have nice stiff sidewalls, and you will not believe how much better it handles. Might ride a little stiffer though. Good luck.
     
  14. Mar 23, 2015 at 7:59 AM
    #134
    olddriver

    olddriver New Member

    Joined:
    Mar 19, 2015
    Member:
    #151295
    Messages:
    4
    Gender:
    Male
    I'm not too thrilled with these 215 tires but there's nothing I can do aboiut it yet. These are on stock wheels which are 15" and there's no truck tires that come in 15's unfortunately. To get better tires I'll have to also get at least 16" wheels. I'm been thinking about another 4x4 4runner so I'm not going to spend money unless I have to. Oh well---
     
  15. Apr 3, 2015 at 6:50 PM
    #135
    AMartin

    AMartin Well-Known Member

    Joined:
    Sep 19, 2014
    Member:
    #138663
    Messages:
    64
    Gender:
    Male
    First Name:
    Andre
    New Brunswick
    Vehicle:
    2009 TRD sport DCLB
    3" Bilstain lift, Anytime Fog, Skid Plate, Procomp 7036, Cooper STmaxx, Heated Seats, Interior Plugs.
    Im at 30 front and 29 back on E class STmaxx.. at that pressure it rides a lot smother.
     
  16. May 15, 2015 at 6:47 PM
    #136
    harpolith

    harpolith Well-Known Member

    Joined:
    Sep 28, 2009
    Member:
    #23469
    Messages:
    633
    Gender:
    Male
    Western SD
    Vehicle:
    2014 SR5 Double Cab 4x4
    I'm running my 245-75-16 MS2's at 35 front, 36 rear. DC 4x4. It's what the dealer put them at when they put the tires on my truck. Seems to be ok. Feels a little soft to me and I wanted to bump them up a little, but when I discovered today that I was already at 35/36, I'm gonna stay where I'm at.

    It's been my understanding that the front is lower pressure because the extra weight in front (coupled with steering) generates more heat, increasing the front tire pressure more than the rear while driving.
     
  17. May 30, 2015 at 6:27 PM
    #137
    tystoy2013

    tystoy2013 Member

    Joined:
    Jun 6, 2013
    Member:
    #105707
    Messages:
    10
    Gender:
    Male
    First Name:
    Tylar
    Ely, Nevada
    Vehicle:
    13 DBLCSB Off Road Tacoma
    Bilstien 5100's with OME 855 springs and Camburg UCAs BP Fabricating Grill Tuffstuff LED lightbar in bumper
    Running 275/70/17 what should I run? Got them from Mr. Wheel deal and it's hot here and they are at 42.... Too high?
     
  18. Aug 2, 2015 at 5:47 PM
    #138
    jumpy180

    jumpy180 Member

    Joined:
    Aug 2, 2015
    Member:
    #160849
    Messages:
    7
    Gender:
    Male
    First Name:
    Barry
    Vehicle:
    '15, TRD Off-road, DC
    None
    The chalk line method can also be replicated by using masking tape.
    Put a strip of masking tape across the tread and put in a day of normal driving; work and back, around town, freeway, what ever is the majority of your normal driving pattern. Then, just like with the chalk line method, see where the tape has worn off. Worn from the middle most, equals a higher pressure, worn fron each edge, equals a low pressure, worn equal across the tape, pressure is fairly right.
    The area on which the tire wears changes with speed, so driving your normal pattern before checking the tape or chalk will give a better indication as to average tire wear. The tape method may take longer to see results, but I think may give better indication than a short, 100 yard drive at slow speed.
     
To Top