18x8.5 fitment

2006sinavi · 10-01-2007, 10:28 PM

Looking at a 18x8.5 wheel with a 48mm offset 5x114.3 bolt - will this fit the si? recommended tire size?
Thanks - and sorry if this has been asked - I tried searching...

Black³ · 10-02-2007, 09:24 AM

18X8.5 45mm offset 235/35-18 will fit, I'm not sure how to do the math for +3 offset to make 48 though?

NA06Si · 10-02-2007, 09:47 AM

I installed my 18X8.5 (45mm offset) Gram Lights yesterday with 225/40 rubber and no fitment issues. I've been told by several folks (including Tirerack) that 235 rubber would require the wheel well lip to be rolled.

***Z1 Performance*** · 10-02-2007, 10:22 AM

Quote:

Originally Posted by Black³

18X8.5 45mm offset 235/35-18 will fit, I'm not sure how to do the math for +3 offset to make 48 though?

225/40/18 is the better fitment

Black³ · 10-02-2007, 05:37 PM

Sorry about that, I meant to type 225 - on a side note just an fyi

when the speedo says 65 mph with those 18"'s you'll actually be going 63.9 mph so thats 1.1 mph off - and thats a good thing because you'll be less likely to get a ticket!

2006sinavi · 10-02-2007, 07:21 PM

Thanks guys - what about the 48mm offset? Is that ok?

next level · 10-03-2007, 05:33 PM

I'm running 215-35-19's on a 8.5 width minor stretch the offset was a 40mm

streetmachine02 · 10-04-2007, 03:56 AM

i had a wheel with a 45mm offset. i am lowered on tein basics. my tire rubbed just barely enough that i got a 3mm spacer. now thats how i run my setup.

HONDACARE · 10-04-2007, 04:02 AM

Quote:

Originally Posted by NA06Si

I installed my 18X8.5 (45mm offset) Gram Lights yesterday with 225/40 rubber and no fitment issues. I've been told by several folks (including Tirerack) that 235 rubber would require the wheel well lip to be rolled.

several folks and tire rack are wrong. i run 235's w/no rubbing

AznSupastar · 10-04-2007, 04:35 PM

Quote:

Originally Posted by streetmachine02

i had a wheel with a 45mm offset. i am lowered on tein basics. my tire rubbed just barely enough that i got a 3mm spacer. now thats how i run my setup.

how low is ur car? would ride height affect the tire / tein coil rubbing (aside from the fender rub if any)? any pix of ur ride, i'm thinking of doing similar setup.

***Z1 Performance*** · 10-05-2007, 09:46 AM

Quote:

Originally Posted by AznSupastar

how low is ur car? would ride height affect the tire / tein coil rubbing (aside from the fender rub if any)? any pix of ur ride, i'm thinking of doing similar setup.

235's will rub on a car with 18x8.5 wheels that is lowered 1.5 inches or more. It may be possible to dial most of it out with negative camber.

A 235mm tire will also rub on the Tein coilover body because it is noticably thicker than the OEM shock body. You would want to run a small spacer to clear the coilover but that would mean even more rubbing on the outer fender/liner.

10-01-2007, 10:28 PM	#1 (permalink)
2006sinavi Junior Member Join Date: Feb 2007 Posts: 9 iTrader: 0 / 0%	18x8.5 fitment Looking at a 18x8.5 wheel with a 48mm offset 5x114.3 bolt - will this fit the si? recommended tire size? Thanks - and sorry if this has been asked - I tried searching...

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10-02-2007, 09:24 AM	#2 (permalink)
Black³ Member Join Date: Aug 2007 Location: Just Moved To TX Posts: 99 Brett iTrader: 0 / 0%	18X8.5 45mm offset 235/35-18 will fit, I'm not sure how to do the math for +3 offset to make 48 though?

10-02-2007, 09:47 AM	#3 (permalink)
NA06Si Senior Member Join Date: May 2007 Location: Durham, NC Age: 33 Posts: 437 Christian iTrader: 1 / 100%	I installed my 18X8.5 (45mm offset) Gram Lights yesterday with 225/40 rubber and no fitment issues. I've been told by several folks (including Tirerack) that 235 rubber would require the wheel well lip to be rolled.

10-02-2007, 05:37 PM	#5 (permalink)
Black³ Member Join Date: Aug 2007 Location: Just Moved To TX Posts: 99 Brett iTrader: 0 / 0%	Sorry about that, I meant to type 225 - on a side note just an fyi when the speedo says 65 mph with those 18"'s you'll actually be going 63.9 mph so thats 1.1 mph off - and thats a good thing because you'll be less likely to get a ticket!

10-02-2007, 07:21 PM	#6 (permalink)
2006sinavi Junior Member Join Date: Feb 2007 Posts: 9 iTrader: 0 / 0%	Thanks guys - what about the 48mm offset? Is that ok?

10-03-2007, 05:33 PM	#7 (permalink)
next level Junior Member Join Date: Sep 2007 Posts: 2 iTrader: 0 / 0%	I'm running 215-35-19's on a 8.5 width minor stretch the offset was a 40mm

10-04-2007, 03:56 AM	#8 (permalink)
streetmachine02 Senior Member Join Date: Mar 2007 Location: St. Louis Posts: 393 Chris iTrader: 0 / 0%	i had a wheel with a 45mm offset. i am lowered on tein basics. my tire rubbed just barely enough that i got a 3mm spacer. now thats how i run my setup.