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BFG KO2 PSI?

Discussion in 'Wheels & Tires' started by AlexM102017, Dec 8, 2018.

  1. Dec 8, 2018 at 4:20 PM
    #1
    AlexM102017

    AlexM102017 [OP] New Member

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    Hey guys i have 275/70/17 bfg ko2’s. What psi do yall run them at?
     
  2. Dec 8, 2018 at 4:22 PM
    #2
    4X4Runner

    4X4Runner The Anti Pro, Pro! Staff Member

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    The left coast
    Vehicle:
    2017 4Runner Smashed Ass Edition
    Mad driver mod. OME Suspension. 285/70R17 BFG AT KO2
    Best bet is to run the chalk test to see what’s PSI gives you the best wear
     
  3. Dec 8, 2018 at 5:33 PM
    #3
    AlexM102017

    AlexM102017 [OP] New Member

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  4. Dec 8, 2018 at 5:39 PM
    #4
    4X4Runner

    4X4Runner The Anti Pro, Pro! Staff Member

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    The left coast
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    Mad driver mod. OME Suspension. 285/70R17 BFG AT KO2
    Yes, take a piece of sidewalk chalk and a large open parking lot. Draw a straight line across your tire and slowly drive 75’-100’ forward keeping the wheel straight. Then, slowly drive straight back to the starting point and check the tire to see what chalk remains. If you have chalk at the edges of the tire, they are over inflated. You may need an air compressor though if you’re already under inflated.
     
    DrewMan, Large, Bob and 1 other person like this.
  5. Dec 8, 2018 at 10:11 PM
    #5
    Kyblack76

    Kyblack76 New Member

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    Kyle
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    285s ko2s here. Run around 32 ish. Dont pay much attention tho..
    Have about 20k on em. All is well so far. Like em. A lot. Heavy snow here, and they do well. Good enough for me and the girls I roll with
     
    Sanchezamed.as@gmail and jgcaps like this.
  6. Dec 22, 2018 at 3:15 PM
    #6
    Irikumi

    Irikumi New Member

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    Adrian
    Arizona
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    ARB Locker, rear.
    I just put BFG KO2'S on mine in size LT285/70R17 load range E. The 275 KO2 is nearly identical specs, except 10mm narrower and 1/2 inch shorter. I asked BFG what they recommended for my 4Runner and they recommend 40PSI. You can go on the BFG website and ask them directly, they have a live chat function on this website during business hours. I am 99% sure they will also tell you 40PSI. The Ford Raptor which comes with KO2'S, although in LT315/70R17, are 38PSI as recommended by Ford on the door sticker... It you go look at the other 4Runner forum, most guys their have settled on 36 to 38 being the sweet spot. A long answer to your question... But, start at 40 and go down, but not below 36PSI and you should be OK. Lower air pressure will reduce your tires carrying capacity but make a little softer ride. If you want to closely match the load capacity of the stock P rated tires with your new LT's, then stick with 40.

    When Off-roading, lower your pressures to increase contact patch foot print, you can find a variety of recommendations from the net, that can vary from 10 to 15PSI on up. I like to stay at 20+ because going to low can risk popping a bead, unless you run bead locks... I don't recommend bead locks on daily driver for the inexperienced, they are technically not DOT approved and more for the dedicated off road machine
     
    DrewMan and Backslider like this.
  7. Dec 22, 2018 at 3:23 PM
    #7
    Irikumi

    Irikumi New Member

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    ARB Locker, rear.
    Just to add something to keep in mind, BFG's tend to wear out the centers a little faster in general, when at recommended pressures. I've had several sets of BFG's on other trucks. But, even with that I get 50k and still have roughly 6/32nds left. I usually replace when I get to 6/32nds.
     
  8. Dec 22, 2018 at 8:57 PM
    #8
    Kyblack76

    Kyblack76 New Member

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    I run around 32-34 ... sheesh
     
  9. Dec 23, 2018 at 4:29 AM
    #9
    karmatp

    karmatp New Member

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    Trevor
    Arizona
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    TRD wheels, 265/70/17 KO2's, Bilstein 5100's .85
    You can actually sent a email to BFG and they will tell you what psi is appropriate for your vehicle. I stayed stock size so I could run load range C and run mine at 40psi.
     

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