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BMC needed?

Discussion in 'Suspension' started by Ron_Pro, Jul 22, 2022.

  1. Jul 22, 2022 at 4:34 PM
    #1
    Ron_Pro

    Ron_Pro [OP] New Member

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    I have 2020 TRD Pro with the stock Fox suspension with the Westcott lift and stock uppers. No bmc was needed to fit 35’s and +25mm wheels.

    I’m upgrading to Kings 2.5’s with Total Chaos uppers. Will I need to get a bmc now?

    Wheels/Tires: 35/12.5 Nitto Ridge Grapplers and +25mm SCS Wheels.
     
  2. Jul 22, 2022 at 5:03 PM
    #2
    Vizsla

    Vizsla 2 = 2.5

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    Maybe? I did not, but every truck is different. Did you get adjustable TC uppers? If not both the non-adjustable and adjustable come set the same, both move the top of the knuckle back to add caster making the tire closer to the body mount. With the adjustable you can move the knuckle forward but lose some caster. Both will allow better alignment with more caster via moving the lower control arm forward some, but maybe not enough to cancel out the additional set back with the TC uppers.
     
    Ron_Pro[QUOTED][OP] likes this.
  3. Jul 22, 2022 at 5:27 PM
    #3
    Ron_Pro

    Ron_Pro [OP] New Member

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    Thank you for your response. I did not order the adjustable tc uppers. I am hoping it’s not needed, but I guess we’ll have to see. I’m not opposed to it at all, I was just wondering if there was a clear cut answer for a yes/no for a bmc.
     
    Vizsla[QUOTED] likes this.
  4. Jul 22, 2022 at 5:37 PM
    #4
    pvn.beluga

    pvn.beluga New Member

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    You may have to since once you change out your suspension components, then it'll mess around with alignment. Install the new kit, get an alignment, and go from there.
     
    Tundra18overland and Ron_Pro[OP] like this.
  5. Jul 22, 2022 at 6:22 PM
    #5
    Vizsla

    Vizsla 2 = 2.5

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    There is not a clear cut answer, but a good alignment tech will help things. I do alignments and have been able to clear things nobody else does but that requires some time. Feel free to dm me with any alignment questions, happy to try and help.
     
  6. Jul 22, 2022 at 7:23 PM
    #6
    Ron_Pro

    Ron_Pro [OP] New Member

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    Appreciate it. Thank you.
     
  7. Jul 22, 2022 at 7:28 PM
    #7
    Elduder

    Elduder New Member

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    Going with no, since the wheel position remains the same. Suspensions more or less (with the exception of long travel), travel roughly the same amount up and down. Lifting the truck reduces the frequency of rub on a truck with a very aggressive offset but get it to full stuff and it'll rub. Changing from the Fox/Westcott to King wont increase scrub radius for the wheel either.

    +25s are pretty much the sweet spot.
     
    Ron_Pro[OP] likes this.
  8. Jul 23, 2022 at 7:59 AM
    #8
    reywcms

    reywcms New Member

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    Too many mods to come
    When in doubt cut it out. Lol I had that same setup previously and definitely needed the BMC done.
     
    Ron_Pro[OP] and pvn.beluga like this.
  9. Jul 23, 2022 at 9:11 AM
    #9
    timdske

    timdske Another Old Guy

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    I did the preemptive strike and did the BMC before my lift and tires. I'm glad I did, because I would've needed it.
     
    Ron_Pro[OP] and pvn.beluga like this.
  10. Jul 23, 2022 at 12:11 PM
    #10
    Ron_Pro

    Ron_Pro [OP] New Member

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    Thanks everyone. I’ll see next Tuesday when it’s all said and done.
     

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