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  1. #1
    sstime71's Avatar
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    Will these fit a magnum

    I would like to know if these would fit a 05 Magnum RT. I know that the bolt pattern is correct. Not sure about the back spacing though. BOLT PATTERN IS 5X115 AND HAS ABOUT 6" BACK SPACING. They are 20 inch Forte wheels. Any help would be appreciated.
    Last edited by sstime71; 04-01-2009 at 10:02 AM. Reason: spelling
    05 Magnum R/T, Magnaflow catback, Superchips 3825, K&N cold air.

  2. #2
    argentmag is offline LX Padiwan
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    I have 20" forte wheels on an '05 mag rt, lowered with eibach pro springs and struts. Not sure about the back spacing - but mine work well. I forget the model, but they're black with like a silver star in the middle. Everyone loves them.

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    gameover's Avatar
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    Can you find out the offset for them? Also how wide are they?
    05 RT . Jett Black . SRT Fascias . UAS . AFEII . Zoomers . Forgiatos . Wilwoods ...

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    sstime71's Avatar
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    Quote Originally Posted by gameover View Post
    Can you find out the offset for them? Also how wide are they?
    The guy selling them doesn't know the offset. They are 20x8.5, he said they were on a 07 Grand Prix GTP. I was a little skeptical.
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  5. #5
    89grand's Avatar
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    Quote Originally Posted by sstime71 View Post
    The guy selling them doesn't know the offset. They are 20x8.5, he said they were on a 07 Grand Prix GTP. I was a little skeptical.
    I believe they are 5x115, but I'm pretty sure the offset will be all wrong.

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    sstime71's Avatar
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    Quote Originally Posted by gameover View Post
    Can you find out the offset for them? Also how wide are they?
    Quote Originally Posted by 89grand View Post
    I believe they are 5x115, but I'm pretty sure the offset will be all wrong.
    That's what I thought as well. Thanks for the help guys.
    05 Magnum R/T, Magnaflow catback, Superchips 3825, K&N cold air.

  7. #7
    OMSRT8 is offline LX Newbie
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    If the backspace is 6" and the wheel is 8.5" and there is a 1/2" lip or wheel bead on both sides, that would make the actual width of the wheel 9.5"

    At 0mm offset, the back space would be half of 9.5" or 4.75" So, what you need to calculate is the difference between 6" and 4.75" converted into mm to find the offset. If the numbers that you have quoted for the wheels are correct (6" backspace and 8.5" width), the offset on these wheels would be 32mm (actually 31.7mm).

    If the backspace is not really 6" but something slightly different, that will change the calculation to determine the offset. Look up the Forte wheels and find out what offset they have that are closest to 32mm and that is what they probably are.
    Last edited by OMSRT8; 04-04-2009 at 09:30 PM.
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