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Anyone Running BFG KO3(s) on Stock Suspension?

Discussion in '4th Gen 4Runners (2003-2009)' started by UFlaw98, Apr 25, 2025 at 8:23 PM.

  1. Apr 25, 2025 at 8:23 PM
    #1
    UFlaw98

    UFlaw98 [OP] New Member

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    Does anyone have any experience with BFG KO3(s) in 265/70 R17 on stock suspension with XREAS? On road wet performance? Road noise? Rubbing?
     
  2. Apr 28, 2025 at 8:00 AM
    #2
    Hungryhawk

    Hungryhawk New Member

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    I always understood that unsprung weight (tires&wheels) rebound after compression was controlled by the shocks internal valve set-up & design.
    Stock suspension is designed around stock tires & wheels which are much lighter than KO3. The drivability might suffer with stock shocks and heavy tires.
     
  3. Apr 30, 2025 at 3:42 AM
    #3
    Bluesky 07

    Bluesky 07 Not a New Member

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    “Deep” Satoshi grille | X-REAS delete / Eibach | Weathertech front & rear mats | Tinted front windows | Floor Armor cargo mat | TPMS bypass | LED interior, tag, & reverse lights | BlueSea Systems console USB power ports | Pioneer AVH-2550NEX HU + Audiovox backup camera | Fumoto F-103S | Rockville lo-pro subwoofer | Kenwood speakers & KAC-M1804 amp | Philips H9/9011 headlight bulbs | Wolfbox G850 Pro dash/rear cam | Map light mod | Breather mod | OBD Fusion diagnostics
    Subjective questions are tough to answer. AT tires will be noisier, but one person’s “slight hum” is someone else’s “loud roar.” As for X-REAS, you’re likely over 150K in an ‘05 so it may be time to think about something else. The “X-REAS delete…” post linked in my sig may be helpful. Read it from the bottom up as I’ve added updates through the years.
     
  4. Apr 30, 2025 at 3:56 AM
    #4
    nye307

    nye307 New Member

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    I used to run K02s on all my off-roady vehicles. I felt it was an all around really great tire, both on road and off. They'd get you out of bed spots off road but at the same time weren't noisy or anything on the highway.

    I'm running falken Wildpeaks now just because a little bit cheaper. I can't tell a difference between the two
     
  5. Apr 30, 2025 at 7:33 AM
    #5
    BoiseG

    BoiseG New Member

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    I’m running KO3s on after market suspension and hate to say it, but I do not recommend the KO3. I’ve had nothing but issues with mine since new. I’ve had one tire warrantied by Discount Tire and after 4 attempts at road force balancing, I still cannot get them balanced. The shop had one extra set when they warrantied mine and they had to go through 3 of them to find one that balanced correctly. They will also develop a flat spot when sitting overnight. It’s not a big deal because it will round out after it warms up, but I’ve never had another tire do that after sitting for only 1 night. I’ve owned multiple sets of KO2s without issues.
     
  6. Apr 30, 2025 at 7:46 AM
    #6
    Spare Parts

    Spare Parts New Member

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    Almost every morning I can feel flat spots the first few miles, seems to be more noticeable with the 4Runner than other vehicles I have owned.
     
  7. Apr 30, 2025 at 8:15 AM
    #7
    BoiseG

    BoiseG New Member

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    What size and type tire are you running?
     
  8. Apr 30, 2025 at 8:50 AM
    #8
    Spare Parts

    Spare Parts New Member

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    Currently, I have the factory slicks (Bridgestone Duelers, 265/70/r17). And I also have Goodyear Wrangler Ultra Terrain 265/70/r17 on old pro rims. Both seem to do it, even my wife’s Rav4 prime has flat spots in the morning, just not as noticeable.
     
  9. Apr 30, 2025 at 9:59 AM
    #9
    nye307

    nye307 New Member

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    IDK, that sounds like an issue other than tires to me. I had the Michelins on my Arnage road force balanced multiple times before a tire tech brought to my attention that one of my wheels was out of round and that they'd be impossible to balance. To which I was asked why nobody in their organization had told me this before while I was wasting money having the tires rebalanced and my question was met with a resounding shrug. There's just so many things that can cause a vibration at speed and not all of it is old car sh** either. As just one example, Discount Tire might have not torqued you to spec and caused a rotor to warp.

    The K02s were such high quality it's really hard for me to believe they would drop down in quality that much for the next iteration while still charging premium prices. Particularly since (at least with the K02s) they sort of held the mantle as the absolute best A/T tire you could buy. But then again, I suppose anything is possible.
     

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