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Conflicting Information regarding wheel back spacing and offset

Discussion in 'Wheels & Tires' started by Gerard6778, Mar 1, 2019.

  1. Mar 1, 2019 at 9:37 AM
    #1
    Gerard6778

    Gerard6778 [OP] Well-Known Member

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    I've been reading numerous threads about wheel backspacing and offset. I understand the desire to push the wheel outwards (although I think some are too extreme), but I've read doing so causes more rubbing issues than having the wheel inward. I have also read the opposite.
    So which is it?

    I'm going to lift my 2015 Double Cab 4x4 2 inches with 6112 lift from Headstrong and will be buying BFG tires in 265/75R16 and I'm undecided on 16x8, SCS F5 wheels with 4.5" BS and 0" offset or SR8 with 4.0" BS and -12" offset. I would like to have the tires sticking out about 1/2" max from factory fender flares.

    Any and all help is appreciated, thanks in advance.
     
  2. Mar 1, 2019 at 9:40 AM
    #2
    CouchlessPotato

    CouchlessPotato Handcuffed to steering wheels still won firefights

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    You don't buy a truck for its fucking fenders!
    2.5" lift w/35's
    0 offset will push the wheels out about an inch. -12 will be almost 2 inches
     
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  3. Mar 11, 2019 at 4:36 PM
    #3
    4biker

    4biker Active Member

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    I think it's easier to think in terms of offset than backspacing. Since you're running 265's you'll be fine with a zero or -12mm offset (one inch is 25.4mm, so 12mm is about 1/2 inch).

    The standard I use is that an 8" wide wheel at 0 offset will be basically flush with the fender on most Toyotas. If you go 8.5" wide it'll be 1/4 inch wider on each side, and 9" wide rim will be 1/2" wider on each side, pushing the edge of the wheel past the flare. Negative offsets push the wheel further out and positive offsets pull the wheel toward the hub, so plan accordingly.

    Luckily 265/75/16's will fit on almost any wheel and not rub, unless you push like -38mm offset or something like that. With both of the wheel choices you posted, you'll be less than or right about 1/2" outside the flare, so you should be good to go.
     
    Gerard6778 [OP] likes this.
  4. Mar 11, 2019 at 4:52 PM
    #4
    4biker

    4biker Active Member

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