Notices
IS - 2nd Gen (2006-2013) Discussion about the 2006+ model IS models

Offset Question

Thread Tools
 
Search this Thread
 
Old Dec 1, 2012 | 12:22 AM
  #1  
josephx66's Avatar
josephx66
Thread Starter
Pole Position
iTrader: (4)
 
Joined: Sep 2009
Posts: 201
Likes: 2
From: CA
Default Offset Question

What offset do I need to make 9 inch wheels flush with the fender. THanks!
Reply
Old Dec 1, 2012 | 06:37 PM
  #2  
josephx66's Avatar
josephx66
Thread Starter
Pole Position
iTrader: (4)
 
Joined: Sep 2009
Posts: 201
Likes: 2
From: CA
Default

Anybody? most people run 9.5 or 10 inch rims. I cant find any info on 9inch width rims
Reply
Old Dec 1, 2012 | 06:49 PM
  #3  
MyIS350G's Avatar
MyIS350G
Lexus Champion
iTrader: (6)
 
Joined: Apr 2010
Posts: 2,977
Likes: 2
From: NorCal - 916
Default

need more info, stock height, drop on springs, coils..
ex: 19x9 +20 stock height is not the same as 19x9+20 with springs, same with coils..
Reply
Old Dec 1, 2012 | 07:13 PM
  #4  
Slammer1's Avatar
Slammer1
Lexus Test Driver
 
Joined: Oct 2010
Posts: 1,212
Likes: 3
From: NC
Default

I am curious on this one too. I am running 18s and looking to go with 18x9s on the rear. I have read that a set offset will not necessarily work with any wheel. Seems it depends on the way that the spokes of the wheel are curved? Some wheels I have searched fit in a 45mm offset, but others don't . Very difficult topic for sure.
Reply
Old Dec 1, 2012 | 07:22 PM
  #5  
heyarms's Avatar
heyarms
Pole Position
iTrader: (5)
 
Joined: Oct 2009
Posts: 2,918
Likes: 40
From: SoTX
Default

Y'all should search the forum as well as the Internet in general. Offset is not very complex, and there's plenty of info on the forum to find wheels that fit your criteria
Reply
Old Dec 1, 2012 | 07:25 PM
  #6  
chase350's Avatar
chase350
Driver School Candidate
iTrader: (2)
 
Joined: Mar 2012
Posts: 48
Likes: 0
From: ca
Default

Most wheel companies only make 9.5 not 9. Wider is always better. U could run a 9.5 in the front and 10.5 in the rear with a offset around 25 to 30 with out any problems. So if u run a 9 your offset should be around 20 to make it flush. I use to have a set of forgestar wheels and they can make whatever offset u what.
Reply
Old Dec 1, 2012 | 07:50 PM
  #7  
projectdna's Avatar
projectdna
Lexus Fanatic
iTrader: (56)
 
Joined: Oct 2006
Posts: 7,371
Likes: 25
From: California
Default

Originally Posted by chase350
Most wheel companies only make 9.5 not 9. Wider is always better. U could run a 9.5 in the front and 10.5 in the rear with a offset around 25 to 30 with out any problems. So if u run a 9 your offset should be around 20 to make it flush. I use to have a set of forgestar wheels and they can make whatever offset u what.
you know how there's always one post in a thread where there's more opinion than fact?...

firstly, most wheel companies can make whatever width a customer wants - as long as money isn't an issue. most wheel companies, however, do stick with standard wheel diameters and widths because they are either the easiest to sell, have the highest profit/cost ratio per wheel, and/or are the most popular size(s).

second, is wider better? there's a point of diminishing returns, because as the wheel width increases, the window of useable offsets decrease. on the outside, it's the wheel vs. the fender. on the inside, it's the wheel vs. suspension components. also, unsprung weight of wider wheels and tires actually bog down the car and possibly affect the car's handling negatively.

also, wider wheels are typically more expensive (albeit marginally) than their narrower counterparts. same goes for tires, assuming certain sizes and widths are actually manufactured/available.

btw, 9.5"/10.5" +25 or +30 will require some fender work, along with running narrower tire sizes. if the "will these wheels fit?" thread has taught the 2is community anything, it's that any flush fitment will require fender work.
Reply
Old Dec 1, 2012 | 08:03 PM
  #8  
IS25Heaven's Avatar
IS25Heaven
Lexus Test Driver
iTrader: (8)
 
Joined: Jan 2009
Posts: 1,125
Likes: 2
From: SOcal
Default

google offset calculator. or read 2 pages of any fitment thread and you will find that you need.
Reply
Old Dec 1, 2012 | 10:08 PM
  #9  
josephx66's Avatar
josephx66
Thread Starter
Pole Position
iTrader: (4)
 
Joined: Sep 2009
Posts: 201
Likes: 2
From: CA
Default

well its just a 9inch wheel fsport drop. 235/35/19 tire im pretty sure. they have a 40 offset right now though as it stands.
Reply
Old Dec 1, 2012 | 10:09 PM
  #10  
josephx66's Avatar
josephx66
Thread Starter
Pole Position
iTrader: (4)
 
Joined: Sep 2009
Posts: 201
Likes: 2
From: CA
Default

im really just trying to figure out which size spacer to buy
Reply
Old Dec 1, 2012 | 10:29 PM
  #11  
heyarms's Avatar
heyarms
Pole Position
iTrader: (5)
 
Joined: Oct 2009
Posts: 2,918
Likes: 40
From: SoTX
Default

Originally Posted by josephx66
im really just trying to figure out which size spacer to buy
don't own a tape measure?? Lol
Reply
Old Dec 1, 2012 | 10:30 PM
  #12  
PlacidBoi's Avatar
PlacidBoi
Lead Lap
10 Year Member
Photogenic
Photoriffic
Shutterbug
iTrader: (11)
 
Joined: Jan 2012
Posts: 566
Likes: 9
From: California
Default

I'm running 19x10 +35 dropped on Tein SS Coilovers, about 2inch drop from stock height. I am stretching 235/35/19 tires just so I dont scrape, but I haven't had any fender mods done to it.
Reply
Old Dec 2, 2012 | 05:11 AM
  #13  
josephx66's Avatar
josephx66
Thread Starter
Pole Position
iTrader: (4)
 
Joined: Sep 2009
Posts: 201
Likes: 2
From: CA
Default

Originally Posted by heyarms
don't own a tape measure?? Lol
No im just not sure where to measure from to get the best reading on what i need
Reply
Old Dec 2, 2012 | 06:12 AM
  #14  
SCWB's Avatar
SCWB
Lexus Test Driver
 
Joined: Aug 2010
Posts: 810
Likes: 1
From: BKK
Default

19X9 +30 with 255/35/19 Pretty flush and No fender mod required.
Reply
Old Sep 5, 2019 | 04:39 PM
  #15  
Mikes08's Avatar
Mikes08
Rookie
 
Joined: Jan 2018
Posts: 51
Likes: 2
From: Florida
Default

Hi, guys I will be running ESR SR11's 18x8.5 (fronts) with 225/40/18 18x9.5 (rears) 255/40/18 I will be lowering my 08 IS250 in BC coil overs approximately 1.3inches in the front and 1.2 inches in the back. I just want to get rid of the fender gap I don't plan on slamming the car since this car will be driven for Auto X events, it will not be a daily driver. Will they fit ??
Reply



All times are GMT -7. The time now is 01:10 PM.