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Anyone knowledgeable about wheel offset?

beneteaubeneteau Member Posts: 8,552 ✭✭✭
edited May 2017 in General Discussion
I'm window shopping for an aftermarket set of wheels for my pickup. The stock OEM wheels on it now are positive 34mm offset.

I've found several wheels with a 38mm offset. I'm aware a positive offset moves the tire/wheel to the inside closer to the suspension.

Do you think the positive increase of 4mm would cause any interference with the suspension system?
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Comments

  • p3skykingp3skyking Member Posts: 23,916 ✭✭✭
    edited November -1
    4mm is less than two turns of a lug nut.

    I'm gonna go out on a limb and say that's probably not too far outside of a manufacturing tolerance on a mass production automobile.

    I would be more concerned with the sway bars handling the quicker direction change.
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  • iceracerxiceracerx Member Posts: 8,860 ✭✭✭
    edited November -1
    You've got your understanding BACKWARDS. Positive offset moves the CENTERLINE of the RIM outward from the contact surface between the wheel hub and the brake rotor/drum surface.

    Thus, the tire/rim will be further away from the suspension components.

    I've said it before and I'll say it again: It is rarely productive to try to out think the automotive engineers that designed your vehicle to work as a system.

    Think about the FORD Exploders (Explorers) that had problems casued by the rear wheel(s)
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  • bpostbpost Member Posts: 32,669 ✭✭✭✭
    edited November -1
    I sell that type of stuff and can say this about the matter. I refuse to sell anything except for what the vehicle came with. The nightmares are legion about trying them, they hit while turning right but not left or the shock tower hits. Plus you can't return them because they are USED. If you run them they are used wheels. If the seller will let you try them first for interference, awesome, if not BUYER BEWARE.
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  • beneteaubeneteau Member Posts: 8,552 ✭✭✭
    edited November -1
    quote:Originally posted by iceracerx
    You've got your understanding BACKWARDS. Positive offset moves the CENTERLINE of the RIM outward from the contact surface between the wheel hub and the brake rotor/drum surface.

    Thus, the tire/rim will be further away from the suspension components.

    I've said it before and I'll say it again: It is rarely productive to try to out think the automotive engineers that designed you vehicle to work as a system.

    Think about the FORD Exploders (Explorers) that had problems casued by the rear wheel(s)


    You will have to argue that with "everything" I've read on the internet. There are offset calculators online that display wheel/tire placement using negative or positive offset. Negative offset moves the wheel/tire outward away from the hub.
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  • tsavo303tsavo303 Member Posts: 8,913 ✭✭✭
    edited November -1
    i thought more offset moves the wheels further from centerline
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  • iceracerxiceracerx Member Posts: 8,860 ✭✭✭
    edited November -1
    quote:Originally posted by tsavo303
    i thought more offset moves the wheels further from centerline


    It does.

    If the centerline of the a vehicle is "O" (ZERO) anything outward from that is POSITIVE (not getting into body design where the passenger side is 'positive' and the driver's side is negative, yet as the dimensions on the DS move away from '0' they are larger, yet negative dimensions)

    M-OFFSET-wheel-diagram-1.jpg
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  • HandLoadHandLoad Member Posts: 15,998 ✭
    edited November -1
    Tire Rack folks are pretty up on wheel and tire possibilities.

    I'm with IceracerX - Degreed Engineers who are specialists spend a lot of time calculating best compromises. Moving Wheels and Tires off OEM positions changes EVERYTHING! Bearing loads, Effective Spring rates, Effective Unsprung Weights, Shock Effectiveness, even Ackermann angles need adjusting.
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  • beneteaubeneteau Member Posts: 8,552 ✭✭✭
    edited November -1
    I seriously doubt 0.15748" (4mm) change will make any difference.
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  • 1911a1-fan1911a1-fan Member Posts: 51,193 ✭✭
    edited November -1
    quote:Originally posted by beneteau

    I seriously doubt 0.15748" (4mm) change will make any difference.







    then why did you ask ?
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  • beneteaubeneteau Member Posts: 8,552 ✭✭✭
    edited November -1
    quote:Originally posted by 1911a1-fan
    quote:Originally posted by beneteau

    I seriously doubt 0.15748" (4mm) change will make any difference.







    then why did you ask ?


    To make people like you wonder.
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  • montanajoemontanajoe Forums Admins, Member, Moderator Posts: 60,240 ******
    edited November -1
    Man,I wouldn't do it,,,
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  • westernMDhunterwesternMDhunter Member Posts: 2,938 ✭✭✭
    edited November -1
    Are these wheels for your Tacoma? No way the picture you posted earlier this year where stock wheels on that, they look like sh**.
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  • remingtonoaksremingtonoaks Member Posts: 26,245 ✭✭✭
    edited November -1
    quote:Originally posted by beneteau

    I seriously doubt 0.15748" (4mm) change will make any difference.





    I seen that much tear up a front end on a 4x4 Chevy!!!!!

    Play stupid games when stupid prizes. Don't cry here when your vehicle to gets tore up because of it
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  • MaaloxMaalox Member Posts: 5,155 ✭✭✭
    edited November -1
    I would suggest yo go to a tacoma forum and ask this question. I have a tundra and on the tundra forum there are literally 100's of posts showing the different wheel options and lift levels and then the outcome of whether or not there are tire rubs.


    Here is one option https://www.tacomaworld.com/forums/wheels-tires.15/
    Regards, MAALOX
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  • gunnut505gunnut505 Member Posts: 10,290 ✭
    edited November -1
    4mm is four dimes stacked up. That's quite a difference.
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  • grumpygygrumpygy Member Posts: 48,464 ✭✭✭
    edited November -1
    The real question is what size tire do you plan to put on it. Also what is the width of that new rim is it wider.
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  • beneteaubeneteau Member Posts: 8,552 ✭✭✭
    edited November -1
    quote:Originally posted by Maalox
    I would suggest yo go to a tacoma forum and ask this question. I have a tundra and on the tundra forum there are literally 100's of posts showing the different wheel options and lift levels and then the outcome of whether or not there are tire rubs.


    Here is one option https://www.tacomaworld.com/forums/wheels-tires.15/


    I've been a member Of Toyota Nation for a few years. I posted the question 2 days ago and haven't received a response.
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