Tire size help - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

sharris721 · 08-11-2013, 11:14 AM

Hey everyone, I need some help deciding on a tire size. I recently bought Volk CE28N 18x8.5 5x100 +44 offset and am going to be purchasing Michelin Pilot Super Sports and can't decide on tire size, 235/40ZR18 or 245/35ZR18, also up for suggestions, any help would be greatly appreciated.

I have a few power mods intake, exhaust, and tune coming soon.
In the spring I plan to get coilovers that have a drop of about 1.42'' front 1.38'' rear

These will be used for daily driving and only in the summer with 3-8 track/autocross days in there.
thanks guys/gals

ZDan · 08-11-2013, 11:39 AM

I'd go 245/35-18. The 235/40 is taller, 25.4" vs 24.8", so it gives slightly worse gearing and higher ride height. No weight penalty for the 245s, and a smidge more lateral grip. No doubt some will insist that 245s are "too wide" for 8.5" wheels, but it's a totally legit fitment, and preferable over the 235/40s.

sharris721 · 08-11-2013, 06:45 PM

Thanks, I think that's what I'll go with. I was a little worried about them rubbing up front.

Amir Ghadiri · 08-12-2013, 12:42 AM

I agree, go with the 245

coyote · 08-12-2013, 12:48 AM

Congrats on the wheels. CE28Ns are a quality modern classic.

I have 245/35R18 Pilot Super Sports on 18x8.5 +43 wheels on the front of mine with 1.75 degrees of negative camber and around a 20mm drop.

Nothing has ever touched, anywhere ... despite my very best efforts.

Jive Turkey · 08-12-2013, 10:01 AM

245's are not too wide for a 8.5 wheels. thats actaulyl what you want.

the 2008+ STI's havea 8.5' wide wheel and come with a 245/40 STOCK. its perfectly square. if i were you i'd go with a 245/40. i think a 245.35 is too small of a side wall.

luckily the PSS do run wider so you will have more meet. you should not rub AT ALL with that setup. just look at how aggressive i'm running and i'm 100% fine DD'ing AND on track.

-ivan

Suberman · 08-12-2013, 10:05 AM

245/35x18 gives stock rolling circumference. 40 series are too tall.

The closest 40 series that gives similar rolling circumference to stock is 225. Also, 225/35 is similar but on the small side, plus not very common!

I find this site very useful because it includes offset:

http://www.rimsntires.com/specs.jsp

sharris721 · 08-12-2013, 11:36 AM

Thanks for all the help! I went with the 245/35ZR18 and got some lug nuts too
http://www.mcgard.com/part-search/pr...-4-valve-stems

sharris721 · 08-17-2013, 11:19 PM

Volk CE28 18x8.5 wrapped in Michelin Pilot Super Sports 245/35/18
saved about 4lbs per wheel!

BUMBLEDOG · 06-19-2014, 12:03 AM

NICE WHEELS !WANT MORE PICS AFTER DROP!

08-11-2013, 11:14 AM	#1
sharris721 Senior Member Join Date: Jul 2012 Drives: BRZ 6MT Location: Ohio Posts: 122 Thanks: 53 Thanked 22 Times in 15 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Tire size help Hey everyone, I need some help deciding on a tire size. I recently bought Volk CE28N 18x8.5 5x100 +44 offset and am going to be purchasing Michelin Pilot Super Sports and can't decide on tire size, 235/40ZR18 or 245/35ZR18, also up for suggestions, any help would be greatly appreciated. I have a few power mods intake, exhaust, and tune coming soon. In the spring I plan to get coilovers that have a drop of about 1.42'' front 1.38'' rear These will be used for daily driving and only in the summer with 3-8 track/autocross days in there. thanks guys/gals

08-17-2013, 11:19 PM	#9
sharris721 Senior Member Join Date: Jul 2012 Drives: BRZ 6MT Location: Ohio Posts: 122 Thanks: 53 Thanked 22 Times in 15 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Volk CE28 18x8.5 wrapped in Michelin Pilot Super Sports 245/35/18 saved about 4lbs per wheel! Attached Images

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08-11-2013, 11:39 AM	#2
ZDan Senior Member Join Date: May 2011 Drives: '23 BRZ Location: Providence, RI Posts: 4,584 Thanks: 1,377 Thanked 3,891 Times in 2,032 Posts Mentioned: 85 Post(s) Tagged: 0 Thread(s)	I'd go 245/35-18. The 235/40 is taller, 25.4" vs 24.8", so it gives slightly worse gearing and higher ride height. No weight penalty for the 245s, and a smidge more lateral grip. No doubt some will insist that 245s are "too wide" for 8.5" wheels, but it's a totally legit fitment, and preferable over the 235/40s.

08-11-2013, 06:45 PM	#3
sharris721 Senior Member Join Date: Jul 2012 Drives: BRZ 6MT Location: Ohio Posts: 122 Thanks: 53 Thanked 22 Times in 15 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Thanks, I think that's what I'll go with. I was a little worried about them rubbing up front.

08-12-2013, 12:48 AM	#5
coyote Senior Member Join Date: Oct 2011 Drives: Slowly Location: brisbane.qld.au Posts: 1,064 Thanks: 212 Thanked 539 Times in 235 Posts Mentioned: 21 Post(s) Tagged: 1 Thread(s)	Congrats on the wheels. CE28Ns are a quality modern classic. I have 245/35R18 Pilot Super Sports on 18x8.5 +43 wheels on the front of mine with 1.75 degrees of negative camber and around a 20mm drop. Nothing has ever touched, anywhere ... despite my very best efforts.

08-12-2013, 10:01 AM	#6
Jive Turkey the tuna, no crust. Join Date: Oct 2012 Drives: 2014 Hachiroku of the year Location: jersey Posts: 2,298 Thanks: 874 Thanked 1,770 Times in 761 Posts Mentioned: 78 Post(s) Tagged: 0 Thread(s)	245's are not too wide for a 8.5 wheels. thats actaulyl what you want. the 2008+ STI's havea 8.5' wide wheel and come with a 245/40 STOCK. its perfectly square. if i were you i'd go with a 245/40. i think a 245.35 is too small of a side wall. luckily the PSS do run wider so you will have more meet. you should not rub AT ALL with that setup. just look at how aggressive i'm running and i'm 100% fine DD'ing AND on track. -ivan

08-12-2013, 10:05 AM	#7
Suberman Banned Join Date: Jul 2013 Drives: Subaru BRZ Sport Tech Satin White Location: Calgary, Alberta,Canada Posts: 1,228 Thanks: 147 Thanked 320 Times in 225 Posts Mentioned: 10 Post(s) Tagged: 0 Thread(s)	245/35x18 gives stock rolling circumference. 40 series are too tall. The closest 40 series that gives similar rolling circumference to stock is 225. Also, 225/35 is similar but on the small side, plus not very common! I find this site very useful because it includes offset: http://www.rimsntires.com/specs.jsp

08-12-2013, 11:36 AM	#8
sharris721 Senior Member Join Date: Jul 2012 Drives: BRZ 6MT Location: Ohio Posts: 122 Thanks: 53 Thanked 22 Times in 15 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Thanks for all the help! I went with the 245/35ZR18 and got some lug nuts too http://www.mcgard.com/part-search/pr...-4-valve-stems

06-19-2014, 12:03 AM	#10
BUMBLEDOG Junior Member Join Date: Mar 2014 Drives: GT86 Location: CHINA Posts: 3 Thanks: 0 Thanked 0 Times in 0 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	NICE WHEELS !WANT MORE PICS AFTER DROP!

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