wheel offset?
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RWD 19xx-1984 DeVille and Fleetwood,
1985-1996 Fleetwood and Brougham Forum Discussion, wheel offset? in Past Cadillac Vehicle Discussion; I looked for the info but didn`t find. I am playing with the idea of maybe putting some 17 in ...
  1. #1
    shrike77 is offline Cadillac Owners Fanatic
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    wheel offset?

    I looked for the info but didn`t find.
    I am playing with the idea of maybe putting some 17 in wheels with 245/55/17 tires on my 1987 Brougham.
    But I cannot figure out the offset they should have.
    I don`t want to rub the front wheels when turning.
    Does anyone have an idea of what the offset would be?

    I kinda like these wheels but not sure they would fit properly (17x8):

    http://www.visionwheel.com/pdf/Visio...RWD%20Tech.pdf

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    cadillac kevin's Avatar
    cadillac kevin is offline Cadillac Owners Master
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    Quote Originally Posted by shrike77 View Post
    I looked for the info but didn`t find.
    I am playing with the idea of maybe putting some 17 in wheels with 245/55/17 tires on my 1987 Brougham.
    But I cannot figure out the offset they should have.
    I don`t want to rub the front wheels when turning.
    Does anyone have an idea of what the offset would be?

    I kinda like these wheels but not sure they would fit properly (17x8):

    http://www.visionwheel.com/pdf/Visio...RWD%20Tech.pdf
    I'd go with whatever the offset is for the factory impala ss wheels.

  4. #3
    shrike77 is offline Cadillac Owners Fanatic
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    Re: wheel offset?

    Thanks!

  5. #4
    turbojimmy's Avatar
    turbojimmy is offline Cadillac Owners Connoisseur
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    Re: wheel offset?

    My '96 and '94 are +2mm, which I think is the same for just about any B/D-body irrespective of the year. I know it's correct for the Roadmasters, Caprices and Impalas.

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    jayoldschool's Avatar
    jayoldschool is offline GM RWD V8 addict
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    Re: wheel offset?

    That's for a 7" wheel, though. IIRC, the wider 8.5" SS wheel is +6.

    http://www.impalassforum.com/vBullet...hp?t=228471%22 That thread will help. Check post 3 and 4. Make sure you understand the difference between backspacing and offset.

    245 45 17 is shorter than stock, btw. You will lose ground clearance, speedo will read high, and engine will be turning faster. 255 55 17 would be stock height.

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    turbojimmy's Avatar
    turbojimmy is offline Cadillac Owners Connoisseur
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    Re: wheel offset?

    Quote Originally Posted by jayoldschool View Post
    That's for a 7" wheel, though. IIRC, the wider 8.5" SS wheel is +6.

    http://www.impalassforum.com/vBullet...hp?t=228471%22 That thread will help. Check post 3 and 4. Make sure you understand the difference between backspacing and offset.

    245 45 17 is shorter than stock, btw. You will lose ground clearance, speedo will read high, and engine will be turning faster. 255 55 17 would be stock height.
    Oops, yes...the +2mm was an 8" rim.

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    shrike77 is offline Cadillac Owners Fanatic
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    Re: wheel offset?

    Thanks guys.

    That is a good link. I did not see it yet but I looked at other threads on the impalassforum.

    Yeah, that was my idea too, before buying wheels I will read more and understand how the offset and backspacing is calculated to make sure the wheels fit

    I`d love 9" wheels at the rear at least but I belive 255/55/17 tires are way more expensive. Still a decision to be made. If I replace my rear end as I plan to I have to swap speedo gears anyways.

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    turbojimmy's Avatar
    turbojimmy is offline Cadillac Owners Connoisseur
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    Re: wheel offset?

    Quote Originally Posted by shrike77 View Post
    Thanks guys.

    That is a good link. I did not see it yet but I looked at other threads on the impalassforum.

    Yeah, that was my idea too, before buying wheels I will read more and understand how the offset and backspacing is calculated to make sure the wheels fit

    I`d love 9" wheels at the rear at least but I belive 255/55/17 tires are way more expensive. Still a decision to be made. If I replace my rear end as I plan to I have to swap speedo gears anyways.
    www.rimsntires.com lets you put in year, make and model and it will find wheels in a variety of diameters and widths. For 20x8, it picked a +2mm offset for my car. They fit perfectly (though they're on my brother's Roadmaster now).

  10. #9
    shrike77 is offline Cadillac Owners Fanatic
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    Re: wheel offset?

    Thanks turbojimmy. I`ll check it out

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