IS F (2008-2014) Discussion topics related to the IS F model

18x9.5 +38 squared tire size/fitment question

Thread Tools
 
Search this Thread
 
Old 02-27-22, 08:20 AM
  #1  
FTWisF
Driver School Candidate
Thread Starter
iTrader: (1)
 
FTWisF's Avatar
 
Join Date: Aug 2021
Location: California
Posts: 33
Received 20 Likes on 7 Posts
Default 18x9.5 +38 squared tire size/fitment question

Will I found some Advan tc418x9.5 +38 all around.
265/35/18 tires all around also.

I do autox once a month and track once every 3 months this is my daily driver also.


I plan to order rr racing coilovers next month also.

Can this setup fit my 2008 isF
Old 02-27-22, 08:55 AM
  #2  
Jwconeil
Moderator
 
Jwconeil's Avatar
 
Join Date: Apr 2017
Location: Indiana
Posts: 3,086
Received 972 Likes on 630 Posts
Default

Yes. You may possibly have a little tire rubbing on the outside lip. I’ve seen some run this without rubbing, some with. You may need a slight lip trim or roll or just to adjust camber. Maybe completely fine with a 265 tire.
The following users liked this post:
FTWisF (03-01-22)
Old 02-28-22, 09:57 AM
  #3  
Gohanburne
Pit Crew
 
Gohanburne's Avatar
 
Join Date: Mar 2013
Location: Wisconsin
Posts: 141
Received 39 Likes on 19 Posts
Default

Originally Posted by Jwconeil
Yes. You may possibly have a little tire rubbing on the outside lip. I’ve seen some run this without rubbing, some with. You may need a slight lip trim or roll or just to adjust camber. Maybe completely fine with a 265 tire.
Would you want a higher offset to not rub or a lower? I'm pretty new to wheels and want to do a squared 18" setup as well.
The following users liked this post:
FTWisF (03-01-22)
Old 02-28-22, 11:56 AM
  #4  
RRRacing
Sponsor
CL Vendor - Starter
iTrader: (1)
 
RRRacing's Avatar
 
Join Date: Dec 2014
Location: Pennsylvania
Posts: 2,706
Received 1,412 Likes on 647 Posts
Default

Originally Posted by Gohanburne
Would you want a higher offset to not rub or a lower? I'm pretty new to wheels and want to do a squared 18" setup as well.

We do a Wedssport TC105x in 18x9.5 square +35 and it fits perfectly. A + 37 should bring the wheel in towards the frame a tad more than a 1/8 so I think that would be fine. I have 1 set of the Wedssports in stock at the moment.

-Justin
RR Sales
__________________
We Engineer Track Proven Upgrades For Your Lexus!
SUPERCHARGERS : ECU TUNING : SUSPENSION : EXHAUST : PPE MASTER DEALER
Online Store: www.RR-Racing.com
Email: Contact@RR-Racing.com
Phone: 484-756-1777
Facebook : Youtube

The following users liked this post:
FTWisF (03-01-22)
Old 02-28-22, 11:59 AM
  #5  
Jwconeil
Moderator
 
Jwconeil's Avatar
 
Join Date: Apr 2017
Location: Indiana
Posts: 3,086
Received 972 Likes on 630 Posts
Default

Originally Posted by RRRacing
We do a Wedssport TC105x in 18x9.5 square +35 and it fits perfectly. A + 37 should bring the wheel in towards the frame a tad more than a 1/8 so I think that would be fine. I have 1 set of the Wedssports in stock at the moment.

-Justin
RR Sales
A 35 offset fits without rubbing on oem fenders and quarters? I have a 45 offset and I don’t see how another 10 mm offset is there.

OP- if you want zero worries, buy a 45 offset. The most popular track size is 18x9.5 et 45. We see 265s and 275 square tire setups on this forum often with no rubbing.
The following users liked this post:
FTWisF (03-01-22)
Old 02-28-22, 12:12 PM
  #6  
ISFpowered
Instructor
 
ISFpowered's Avatar
 
Join Date: Mar 2018
Location: California
Posts: 992
Received 347 Likes on 219 Posts
Default

I have 19x8.5 30et up front with a 255/35 and only rub at full lock on the plastic liner. Take it for what its worth and I’m pretty low.
The following users liked this post:
Positron (02-28-22)
Old 02-28-22, 12:40 PM
  #7  
93MSB
Instructor
iTrader: (8)
 
93MSB's Avatar
 
Join Date: May 2007
Location: Texas
Posts: 994
Received 160 Likes on 103 Posts
Default

FWIW I have no rubbing with Enkei RPF1 18x9.5 +38, 255/40/18 DWS06+, stock suspension in front, and bilstein shocks in the rear w/stock springs
The following 2 users liked this post by 93MSB:
FTWisF (03-01-22), s2ne1 (03-04-22)
Old 02-28-22, 12:43 PM
  #8  
ISFpowered
Instructor
 
ISFpowered's Avatar
 
Join Date: Mar 2018
Location: California
Posts: 992
Received 347 Likes on 219 Posts
Default

Originally Posted by 93MSB
FWIW I have no rubbing with Enkei RPF1 18x9.5 +38, 255/40/18 DWS06+, stock suspension in front, and bilstein shocks in the rear w/stock springs
You’re at stock height AKA monster truck suspension so that’s why you have no rubbing issues lol.
The following 4 users liked this post by ISFpowered:
FTWisF (03-01-22), LexusfanVA (03-01-22), Positron (02-28-22), RJMacReady (07-08-23)
Old 02-28-22, 03:13 PM
  #9  
RRRacing
Sponsor
CL Vendor - Starter
iTrader: (1)
 
RRRacing's Avatar
 
Join Date: Dec 2014
Location: Pennsylvania
Posts: 2,706
Received 1,412 Likes on 647 Posts
Default

Originally Posted by Jwconeil
A 35 offset fits without rubbing on oem fenders and quarters? I have a 45 offset and I don’t see how another 10 mm offset is there.

OP- if you want zero worries, buy a 45 offset. The most popular track size is 18x9.5 et 45. We see 265s and 275 square tire setups on this forum often with no rubbing.

Whether you get rubbing or not also significantly depends on how your shock travel is adjusted as well as camber. If we are talking track, then most track setups run about -2.5deg or more negative camber, so with track camber setting like, and proper setup of the shock length up front (which is why we use helper springs) that running 275 square setup on a 35 offset will work and should not rub.

If you are not running track camber then running 255 front with 35offset should be fine.

Rafi


__________________
We Engineer Track Proven Upgrades For Your Lexus!
SUPERCHARGERS : ECU TUNING : SUSPENSION : EXHAUST : PPE MASTER DEALER
Online Store: www.RR-Racing.com
Email: Contact@RR-Racing.com
Phone: 484-756-1777
Facebook : Youtube

The following users liked this post:
FTWisF (03-01-22)
Old 02-28-22, 06:30 PM
  #10  
Jwconeil
Moderator
 
Jwconeil's Avatar
 
Join Date: Apr 2017
Location: Indiana
Posts: 3,086
Received 972 Likes on 630 Posts
Default

Originally Posted by RRRacing
Whether you get rubbing or not also significantly depends on how your shock travel is adjusted as well as camber. If we are talking track, then most track setups run about -2.5deg or more negative camber, so with track camber setting like, and proper setup of the shock length up front (which is why we use helper springs) that running 275 square setup on a 35 offset will work and should not rub.

If you are not running track camber then running 255 front with 35offset should be fine.

Rafi

If that’s the case, 38 may be better than 45. Inner clearance is very limited with a 45. That’s assuming OP wants to run race camber.
The following users liked this post:
FTWisF (03-03-22)
Old 02-28-22, 11:54 PM
  #11  
ChpEng
Intermediate
iTrader: (1)
 
ChpEng's Avatar
 
Join Date: Mar 2020
Location: CA
Posts: 492
Received 275 Likes on 156 Posts
Default

Originally Posted by RRRacing
We do a Wedssport TC105x in 18x9.5 square +35...
Have these wheels seen road course duty? If so, how have they fared?
The following users liked this post:
FTWisF (03-03-22)
Old 03-01-22, 06:39 AM
  #12  
RRRacing
Sponsor
CL Vendor - Starter
iTrader: (1)
 
RRRacing's Avatar
 
Join Date: Dec 2014
Location: Pennsylvania
Posts: 2,706
Received 1,412 Likes on 647 Posts
Default

Originally Posted by ChpEng
Have these wheels seen road course duty? If so, how have they fared?

We have them on our shop car. It certainly gets its fair share of track abuse. Usually, Rafi is pushing the car to a different level while testing for failure points in new products. Example: when he was jumping curbs at Watkins glen and cracked the windshield in an effort to push the limits of the new control arms.

Another thing to note about the +35's, customers usually have an expectation of a flush wheel. More often than not, a customer will put that on the priority list for wheel fitment. The +35 puts them right there at the fender face. If it's not a track specific application, then you can pair that with a 245 or 255 front for a great street look too.

-Justin
RR Sales






__________________
We Engineer Track Proven Upgrades For Your Lexus!
SUPERCHARGERS : ECU TUNING : SUSPENSION : EXHAUST : PPE MASTER DEALER
Online Store: www.RR-Racing.com
Email: Contact@RR-Racing.com
Phone: 484-756-1777
Facebook : Youtube

The following users liked this post:
ChpEng (03-01-22)
Old 03-01-22, 09:42 AM
  #13  
LexusfanVA
Instructor
iTrader: (1)
 
LexusfanVA's Avatar
 
Join Date: Sep 2016
Location: MD
Posts: 754
Received 262 Likes on 159 Posts
Default

On my 2008 I ran :
Wheels: 18x9.5+38 square Rays Gramlights 57CR
Tires: 255/40/18 275/35/18 BF Goodrich sport comp 2
Suspension: BC coilovers with swift 14/10 springs.
I had soft coilovers and a tall front tire, so I rubbed very slightly on dips and had rubbing going reverse at full turn lock. Wasn't that annoying and tires were meaty and comfortable. That being said, my rears were already rolled from a previous WedSport setup(19x9.5+35 and 19x10.5+45 with 245/275 tires, too much stretch and rub for me with the soft coilovers). Looking back I should have done 265/35 square and likely been great. The gramlights were aggressive looking and flush and had good depth to the spokes. Light too, I recall either 19.4 or 20.4 lbs depending on which website weighed them. To answer your question, at stock height with your suggested setup, you shouldn't have any issues.



On my 2012 I ran:
Wheels: 19x9.5+45 square same Gramlights 57CR
Tires: 255/35/19 and 285/30/19 tires Michelin tires(P4S front and PSS rear)
Suspension: HKS 16/10 coilovers, which were better than both the 14/10 BC swift, and the BC Swift 16/12 my 2012 ISF came with.
The 19x9.5's were 22 lbs and the car had no rolled fenders. Tires were meaty, and yes the inner wheel to suspension was too thin to stick a pinky between the wheel but I never had any issues. I had zero issues with rubbing of any kind, even on the worst dips. They were a little more sunk in, but still looked great and functioned even better.


Side profiles I felt the 19" looked better, especially since 255/40 on the 18 was a little too thick.



If you want more pics, plenty on my ig @russiancarguy anything before 2019 was the 18" black I painted gray. The 19" were HS Gunmetallic. Not the gun blue color.

Last edited by LexusfanVA; 03-01-22 at 10:43 AM.
The following 3 users liked this post by LexusfanVA:
BS ISF (03-01-22), FTWisF (03-01-22), s2ne1 (03-04-22)
Old 03-01-22, 12:49 PM
  #14  
FTWisF
Driver School Candidate
Thread Starter
iTrader: (1)
 
FTWisF's Avatar
 
Join Date: Aug 2021
Location: California
Posts: 33
Received 20 Likes on 7 Posts
Default

Great info in this thread .
I'm still debating on what rims I want.
I also found a great deal on Enkei silver nt03+m 18x8.5 + 38 18x9.5+40.


Also found 18x9.5 +40 all around nt03.
so many choices lol18x9.5 +4018x9.5 +40


Last edited by FTWisF; 03-01-22 at 12:54 PM.
Old 03-04-22, 04:40 AM
  #15  
s2ne1
7th Gear
 
s2ne1's Avatar
 
Join Date: Aug 2021
Location: STRAYA
Posts: 7
Received 1 Like on 1 Post
Default

Originally Posted by 93MSB
FWIW I have no rubbing with Enkei RPF1 18x9.5 +38, 255/40/18 DWS06+, stock suspension in front, and bilstein shocks in the rear w/stock springs
have any pictures of this setup? looking to go similar setup.


Quick Reply: 18x9.5 +38 squared tire size/fitment question



All times are GMT -7. The time now is 06:47 AM.