Notices
Series I Wheels, Tires, Brakes & Suspension

Seriosly need some input for picking offsets (8.5)

Thread Tools
 
Search this Thread
 
Rate Thread
 
Old 06-30-2009 | 04:00 PM
  #1  
dezau's Avatar
Thread Starter
Registered
iTrader: (3)
 
Joined: Mar 2009
Posts: 1,711
Likes: 2
From: Windermere, FL
Seriosly need some input for picking offsets (8.5)

Guys, I swear this is gonna be the last thread of me asking about wheels.

So, I'm gonna get some 18x8.5 CR-Kai next week (finally)
However, I'm still stuck in picking out the best offset between within the three semi-concave offsets.
I currently have 245/40ZR18 Tires with stock suspensions

Which one do you guys think would look best actually, between +25, +32 and +38, I am really confused now.
My car is pretty bone stock on exteriors
http://i42.tinypic.com/1zbgntc.jpg
http://i41.tinypic.com/2guzleo.jpg

Though I'm probably going to lower the car by an inch or a little more later with coilovers
+25, +32, +38 offsets would push my wheels out by 18mm, 24mm, 31mm respectively.
These all fit, so please dont' tell me to post it on "Will It Fit"

What really confuses me the most are these.
These are pictures of Im_DANomite's car, he has 9.5 and +38mm offset, which by calculation shud be the same as +25 of 8.5, pushing the wheel out 31mm
Name:  VIR.jpg
Views: 628
Size:  46.8 KB



when this, the front wheel is +30mm

which the offset would look closer to +32

To me, I think +32 would suit me most, but if they had to be special ordered, then I'd rather decide between +25 and +38, which one do you think would give me a closer look to the one with +30 offset?


This is +38

This is too conservative, don't u think?
So my main concern!
Would 8.5 +25 look bad? Would it look too wide? I need input please! Thanks a lot guys!
Trust me, i looked, nobody had this combination before, and i don't really wanna Eff up my car on my first set of custom wheels

Last edited by dezau; 06-30-2009 at 04:08 PM.
Old 06-30-2009 | 04:14 PM
  #2  
bose's Avatar
Reginald P. Billingsly
iTrader: (5)
 
Joined: Sep 2007
Posts: 1,915
Likes: 1
From: Taylorsville, UT
I would do the 25 offset. It will put the wheels nice and flush, you may need to do a fender roll but you might be able to get away with it.
Old 06-30-2009 | 04:24 PM
  #3  
Easy_E1's Avatar
Registered
iTrader: (2)
 
Joined: Sep 2005
Posts: 7,675
Likes: 5
From: Bellevue WA
This is a 38 offset. It works fine. If you want them farther out then get the 25 offset. I'm happy with this setup. No rubbing at all. And the tires are 265/35

Name:  mini-Newrims10152007011.jpg
Views: 657
Size:  46.5 KB
Old 06-30-2009 | 04:25 PM
  #4  
J8635621's Avatar
Pew Pew Pew
iTrader: (10)
 
Joined: Jun 2007
Posts: 6,344
Likes: 128
From: Waco
You will have to roll the fenders/run negative camber to make them fit. AND they won't look as good as 9.5" my .02 (in +25)
Old 06-30-2009 | 04:32 PM
  #5  
Jedi54's Avatar
Administrator
iTrader: (7)
 
Joined: Mar 2004
Posts: 22,444
Likes: 2,797
From: The Dark Side
****paging Atilla****
Old 06-30-2009 | 04:39 PM
  #6  
Atilla's Avatar
I am THAT guy
iTrader: (1)
 
Joined: May 2007
Posts: 5,994
Likes: 5
From: Caca Cali
Atilla here...

+25 on a 8.5 will fit with 245/40.

IIRC this is the setup that dozer currently has on his rears and they fit fine. You may want to also take into consideration that if you're gonna go with 40 sidewall - you may want to steer away from KDW's as they seem to run a little 'fatter' than most tires.

On second thought - depending on how aggressive your drop is...40 sidewall might cut it a little close. I don't know what kinda tire you have ATM however if you're gonna drop more than an inch you may want to take that into consideration as well. I believe a smaller sidewall would also help if you don't plan on cambering.

p.s. - cambering would also help your cause

Last edited by Atilla; 06-30-2009 at 04:46 PM.
Old 06-30-2009 | 05:00 PM
  #7  
The Reverend's Avatar
That's a lie
iTrader: (1)
 
Joined: Jan 2009
Posts: 2,320
Likes: 1
From: I don't wear panties
+25 Offset

Do it.
Old 06-30-2009 | 05:54 PM
  #8  
I8U's Avatar
I8U
Registered
iTrader: (1)
 
Joined: May 2006
Posts: 1,934
Likes: 0
From: Carolina Beach, NC
Of those 3, I pick the +38.
Old 06-30-2009 | 08:55 PM
  #9  
c0ldf1ame's Avatar
Registered
iTrader: (5)
 
Joined: Mar 2004
Posts: 1,394
Likes: 0
From: los angeles, ca
i'd go with +38 since its the closest to the stock setup,
Old 06-30-2009 | 09:01 PM
  #10  
mike[piston eater]'s Avatar
O' Let's do it.
iTrader: (3)
 
Joined: Sep 2008
Posts: 2,175
Likes: 2
From: riverside, cali
+25 it'll be hella flush lol, nahh itll look really clean
Old 06-30-2009 | 09:46 PM
  #11  
rx8thunder's Avatar
Being (new) single rocks!
 
Joined: Mar 2008
Posts: 1,485
Likes: 0
From: Toronto, Ontario, Canada
+ 25, definitely. Will be flush and look hot!
Old 06-30-2009 | 10:21 PM
  #12  
SilverHokie's Avatar
I'm Delaware Fast
iTrader: (1)
 
Joined: Dec 2007
Posts: 450
Likes: 0
From: Blacksburg VA/Dover DE
dezau,

1.) Might I ask where you ordered your wheels? I just ordered CR Kai's myself. I went with the 9.5's +38 Deep Concave in the rear and 8.5 +37 semi-concave in the front. The flat face's look terrible in my opinion. Hopefully when they get here, it is what I ordered.

2.) I would honestly go with the +38. Not that I think you want to be conservative, but because with this setup at least you would be able to do almost anything you want with it.

Fatter/Taller Tires (255?), and go about as low as you want to. Maybe some Tein S-Tech's would do the trick. I believe with the +25 you may run into issues if you decide to lower the car, which could be fixed with a roll, but you gain no particular concavity advantage changing around the offsets. +38 and drop the **** out of it. Annddddddd....go!
Old 07-01-2009 | 01:42 AM
  #13  
Juice's Avatar
I made some poos
iTrader: (1)
 
Joined: Sep 2005
Posts: 841
Likes: 0
From: Pittsburgh, PA
Why get the 8.5 inch wides?

I don't know if I missed a previous thread or if there is something else I have not considered, but why even bother with the 8.5 inch wide wheels.

My opinion would be to get the 9.5 +38, mount your 245/40/18 tires on them and be done with it

When the time comes for new tires, you can go for something wider like a 265/35.
Old 07-01-2009 | 01:48 AM
  #14  
Razz1's Avatar
Mu ha.. ha...
 
Joined: Aug 2004
Posts: 14,361
Likes: 3
From: Cali
I would stick as close to 45mm offset as possible.

Especially if you want to track it.
Old 07-01-2009 | 03:19 AM
  #15  
TeamRX8's Avatar
Registered
iTrader: (25)
 
Joined: Apr 2005
Posts: 26,866
Likes: 2,083
highly recommend the new Kumho XS, good price and awesome grip

http://www.tirerack.com/tires/tires....Model=Ecsta+XS

running a low offset may look kool, but it hurts handling by increasing the steering geometry scrub radius, plus the longer suspension lever arm also results in more body roll for a given swaybar/spring rate


.

Last edited by TeamRX8; 07-01-2009 at 03:24 AM.
Old 07-01-2009 | 10:49 AM
  #16  
SilverHokie's Avatar
I'm Delaware Fast
iTrader: (1)
 
Joined: Dec 2007
Posts: 450
Likes: 0
From: Blacksburg VA/Dover DE
18x9.5's CR Kai's are damn near impossible to get now...it took Fluid a couple of days to find my staggered set. Mind you I wanted the 9.5's all around. Dezau, you didn't answer where you ordered your wheels from.
Old 07-01-2009 | 10:55 AM
  #17  
Atilla's Avatar
I am THAT guy
iTrader: (1)
 
Joined: May 2007
Posts: 5,994
Likes: 5
From: Caca Cali
Originally Posted by TeamRX8
highly recommend the new Kumho XS, good price and awesome grip

http://www.tirerack.com/tires/tires....Model=Ecsta+XS

running a low offset may look kool, but it hurts handling by increasing the steering geometry scrub radius, plus the longer suspension lever arm also results in more body roll for a given swaybar/spring rate


.
I know it's probably a long shot to get this answer as it might take this thread wayyyyy off track but...can you elaborate on how it would disturb the handling? Not that I disagree in anyway, I'm just genuinely interested.
Old 07-03-2009 | 04:45 AM
  #18  
TopGear8's Avatar
mkuhnracing.com
iTrader: (3)
 
Joined: Jun 2007
Posts: 6,212
Likes: 4
From: Charlotte, NC
If your going to go with the 8.5's, I would get the +32.

Are you worried more about performance, or looks.

If it is looks, get the +25.

If it is handling, get the +38.
Old 07-03-2009 | 09:15 PM
  #19  
SilverHokie's Avatar
I'm Delaware Fast
iTrader: (1)
 
Joined: Dec 2007
Posts: 450
Likes: 0
From: Blacksburg VA/Dover DE
So the +32 is for looks AND handling? (What I ordered for the fronts)
Old 07-12-2009 | 03:22 PM
  #20  
Nick R's Avatar
06 Copper Red Shinka
 
Joined: Mar 2007
Posts: 104
Likes: 0
From: Pewaukee, WI
Originally Posted by Atilla
I know it's probably a long shot to get this answer as it might take this thread wayyyyy off track but...can you elaborate on how it would disturb the handling? Not that I disagree in anyway, I'm just genuinely interested.
I don't have a ton of time to expound right now but it is true.

Offset is the distance from the center line of the wheel to the hub mounting surface. The further you move the offset from the stock distance the more you move the wheel away from its intended pivot point on the pavement. You need to increase or decrease offset evenly with your changes in width, etc... If you don't, instead of the wheel pivoting on a point when you turn, it hast to travel along an arc instead. This changes the response and driving behavior of the car and scrubs your tires. As also mentioned this changes suspension geometry as well and can put extra stress on members than originally intended.

I believe tirerack has something on this as well. If I get a chance later I'll elaborate more.

-Nick
Old 07-12-2009 | 03:54 PM
  #21  
Razz1's Avatar
Mu ha.. ha...
 
Joined: Aug 2004
Posts: 14,361
Likes: 3
From: Cali
That's why your best option is da Enkei RPF1 45mm off set from

http://www.good-win-racing.com/
Old 07-25-2009 | 11:38 PM
  #22  
dezau's Avatar
Thread Starter
Registered
iTrader: (3)
 
Joined: Mar 2009
Posts: 1,711
Likes: 2
From: Windermere, FL
so i got my wheels finally
+25 offset with 1.6 drop looks super awesome!
Old 07-26-2009 | 12:55 AM
  #23  
RickA's Avatar
Party.
iTrader: (2)
 
Joined: Jul 2009
Posts: 464
Likes: 0
From: Newport Beach, CA
Originally Posted by dezau
so i got my wheels finally
+25 offset with 1.6 drop looks super awesome!
I was about to reply to the thread with an endless supply of "+25" but I'm glad to see you got them post pics

Last edited by RickA; 07-26-2009 at 12:57 AM.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
fourwhls
RX-8's For Sale/Wanted
7
02-20-2019 06:16 PM
hufflepuff
Series I Wheels, Tires, Brakes & Suspension
6
05-30-2016 11:45 AM
JCTaylor
New Member Forum
3
09-30-2015 08:31 PM
GranTouTou
Series I Wheels, Tires, Brakes & Suspension
0
09-30-2015 07:11 AM
Learners_Permit
Series I Interior, Audio, and Electronics
8
09-27-2015 08:38 PM



You have already rated this thread Rating: Thread Rating: 0 votes,  average.

Quick Reply: Seriosly need some input for picking offsets (8.5)



All times are GMT -5. The time now is 11:40 AM.