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Will my rims fit after theyre widened 1"?

Old 03-17-2008, 08:32 PM
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Default Will my rims fit after theyre widened 1"?

hey guys i currently have c6 z06 wheels and the rears need to be wider. Im gonna get them widened 1" at WeldCraft but im wondering if they will fit. I know ill need to run a spacer but what size and i dont want the tires to come past the fender at all. Preferebly set in just a tad so the tires dont hit the top of the fender under load even with the lips rolled. offset on my rims are 50mm

1. Will this work?
2. What size spacer?
3. BFH mod like crazy?
Old 03-18-2008, 06:13 AM
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i had 19x11 that i got from tomzwheels on the rear of my z last year.the tires were 285-35-19.
Old 03-18-2008, 08:41 AM
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Do a little math . . .

But with out knowing the width of your wheel can't figure it out . . .

Formulas to fill in:

Wheel width (WW) +1" = X

X / 2 = New Center Line of Wheel. (NCL)

NCL - (WW/2) = Difference in Center Lines. (DCL)

Take DCL and convert to MM = DCL * 25.4 MM = DCL in MM.

Add old offset and DCL in MM and now you have your new offset.

From there the spacer size can be calculated, using info from the sticky at top of forum.

Confused Yet???

Oh and typing all that I see the size in your sig . . . fill in the blanks!
Old 03-18-2008, 09:05 AM
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Originally Posted by Xsta Z 28
Do a little math . . .

But with out knowing the width of your wheel can't figure it out . . .

Formulas to fill in:

Wheel width (WW) +1" = X

X / 2 = New Center Line of Wheel. (NCL)

NCL - (WW/2) = Difference in Center Lines. (DCL)

Take DCL and convert to MM = DCL * 25.4 MM = DCL in MM.

Add old offset and DCL in MM and now you have your new offset.

From there the spacer size can be calculated, using info from the sticky at top of forum.

Confused Yet???

Oh and typing all that I see the size in your sig . . . fill in the blanks!
Old 03-18-2008, 04:57 PM
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thanks...sorry i forgot to mention my rims are currently 9.5" wide so once finished theyll end up being 10.5"
Old 03-18-2008, 04:58 PM
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kinda confused on that DCL stuff and how to calculate the size of spacer
Old 03-18-2008, 06:56 PM
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Question

Originally Posted by Xsta Z 28
Do a little math . . .

9.5 +1" = 10.5"

New Wheel Center Line 10.5" / 2 = 5.25"

Old Wheel Center Line 9.5" / 2 = 4.75"

5.25 - 4.75 = 0.5"

Convert to MM = 0.5" * 25.4 MM = 12.7 MM.

50 MM + 12.7 MM and your new offset is 62.7 MM.

From the sticky a 10.5" wheel is recommended to have a 38 MM to 50 MM offset. . . . . So . . . a spacer anywhere between 24.7 MM to 12.7 MM could work. . . .

Get it????
Old 03-18-2008, 09:51 PM
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yeah i understand. Would you lean more towards 13mm spacer or 23mm spacer for not sticking out the fender? u think ill have to bfh mod like crazy?
Old 03-19-2008, 08:23 AM
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Originally Posted by CAMAROZ28AQUINO
yeah i understand. Would you lean more towards 13mm spacer or 23mm spacer for not sticking out the fender? u think ill have to bfh mod like crazy?
Well I have 38 mm offset 10.5" wide rear wheels with 295/35ZR18. No BFH, but I did need to roll the quarter panel lip a bit. (pics below)




The sized spacer to run is really up to you, if you want the wheel slightly tucked in, run a smaller spacer. If you want the wheel and tire closer to flush, run a bigger spacer.

All of my recommendations keep the wheel and tire within the wheel well, I.E. never sticking out (hate that look) . . .

If I were in your shoes I'd most likely shoot for a 7/8" (22 mm) to a 3/4" (19 mm) spacer/adapter. That should put the tire in just far enough to not need rolling and far enough out to not need BFH. . . .
Old 03-19-2008, 09:22 AM
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do you know of any sponsors that sell wheel spacers?
Old 03-19-2008, 03:50 PM
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Originally Posted by CAMAROZ28AQUINO
do you know of any sponsors that sell wheel spacers?
Sorry not off hand.


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