BBK fitment question - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

cslntuee · 12-23-2014, 09:15 PM

HI,
I plan to upgrade to 18” wheel in the near future.
I do not have budget now, but I also plan to upgrade the BBK when I have budget.
What’s the suggestion (or minimum requirement) for the width of the ET value for 18” wheel in order to fit BBK without using spacer? (I have STI pink spring, so it is around 15 mm drop)
I know that might also need to consider the shape of the wheel, but I just want to have a roughly idea to select my wheel now.
Thanks a lot.

CSG Mike · 12-23-2014, 09:38 PM

It's wheel specific... there's no (common) generic measurement, unfortunately.

mike the snake · 12-23-2014, 10:00 PM

My Enkei Raijins are 18x9.5 with -45 offset and with very wide 265 Michelin Pilot Super Sports (which run a bit wider than other brand tires I'm told) I have a perfect flush fit in the rear with no issues.

The 18x8.5 fronts with the same offset (-45) and 245 MPSS tires could use a 5 or 10mm spacer to be perfectly flush.

Others have run the 9.5's same offset in front, but you need coilovers to clear the springs and perches on the inside.

As already stated, it varies wheel to wheel, but these numbers can give you ballpark as to what you can stuff into the fenderwells.

mav1178 · 12-23-2014, 10:47 PM

Caliper clearance is entirely dictated by (in order of decreasing importance) 1) spoke design, 2) offset, and 3) wheel width.

An example:
http://www.workwheelsusa.com/media/w...IZING_1214.pdf

Another illustration would be this cross-section picture of the Volk Racing ZE40:

-alex

cslntuee · 12-24-2014, 08:46 PM

Quote:

Originally Posted by CSG Mike

It's wheel specific... there's no (common) generic measurement, unfortunately.

Any idea for SSR GTV03 18'' wheel?
http://www.ssr-wheels.com/wheels/gtv03.asp

Thanks.

mav1178 · 12-24-2014, 09:18 PM

@cslntuee only way to know is to provide the template to SSR and see if they can measure for you.

http://www.apracing.com/Drawings/P16.315.pdf

-alex

12-23-2014, 09:15 PM	#1
cslntuee Senior Member Join Date: Sep 2012 Drives: Subaru BRZ Limited Location: Lexington MA Posts: 962 Thanks: 604 Thanked 103 Times in 79 Posts Mentioned: 11 Post(s) Tagged: 0 Thread(s)	BBK fitment question HI, I plan to upgrade to 18” wheel in the near future. I do not have budget now, but I also plan to upgrade the BBK when I have budget. What’s the suggestion (or minimum requirement) for the width of the ET value for 18” wheel in order to fit BBK without using spacer? (I have STI pink spring, so it is around 15 mm drop) I know that might also need to consider the shape of the wheel, but I just want to have a roughly idea to select my wheel now. Thanks a lot. Last edited by cslntuee; 12-23-2014 at 10:38 PM.

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12-23-2014, 09:38 PM	#2
CSG Mike Join Date: Jul 2012 Drives: S2000 CR Location: Orange County Posts: 14,564 Thanks: 8,942 Thanked 14,213 Times in 6,856 Posts Mentioned: 970 Post(s) Tagged: 14 Thread(s)	It's wheel specific... there's no (common) generic measurement, unfortunately.

12-23-2014, 10:00 PM	#3
mike the snake Senior Member Join Date: Jul 2013 Drives: 2013 BRZ Location: Norcal Posts: 1,592 Thanks: 1 Thanked 623 Times in 378 Posts Mentioned: 15 Post(s) Tagged: 0 Thread(s)	My Enkei Raijins are 18x9.5 with -45 offset and with very wide 265 Michelin Pilot Super Sports (which run a bit wider than other brand tires I'm told) I have a perfect flush fit in the rear with no issues. The 18x8.5 fronts with the same offset (-45) and 245 MPSS tires could use a 5 or 10mm spacer to be perfectly flush. Others have run the 9.5's same offset in front, but you need coilovers to clear the springs and perches on the inside. As already stated, it varies wheel to wheel, but these numbers can give you ballpark as to what you can stuff into the fenderwells.

12-23-2014, 10:47 PM	#4
mav1178 Senior Member Join Date: Apr 2013 Drives: 2005 Toyota Camry Location: 91745 Posts: 6,562 Thanks: 493 Thanked 6,099 Times in 3,030 Posts Mentioned: 95 Post(s) Tagged: 3 Thread(s)	Caliper clearance is entirely dictated by (in order of decreasing importance) 1) spoke design, 2) offset, and 3) wheel width. An example: http://www.workwheelsusa.com/media/w...IZING_1214.pdf Another illustration would be this cross-section picture of the Volk Racing ZE40: -alex

12-24-2014, 09:18 PM	#6
mav1178 Senior Member Join Date: Apr 2013 Drives: 2005 Toyota Camry Location: 91745 Posts: 6,562 Thanks: 493 Thanked 6,099 Times in 3,030 Posts Mentioned: 95 Post(s) Tagged: 3 Thread(s)	@cslntuee only way to know is to provide the template to SSR and see if they can measure for you. http://www.apracing.com/Drawings/P16.315.pdf -alex

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