what tire size. - Pontiac GTO Forum
User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 6 (permalink) Old 06-04-2011, 11:43 AM Thread Starter
 
The Chosen One's Avatar
 
Join Date: Dec 2010
Location: Cincinnati Ohio
Posts: 40
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
what tire size.

im buying a set of 18x8 tsw thruxtons. im wanting to lower the car roughly 1" up front and 3/4" in the rear. now my question is with running a set of 18x8 will i be able to use 245/40/18 or will i need to roll. im getting a deal on the wheels so my future plan is to buy 2 18x9 and use a 275/35/18. i found these tire sizes in the sticky of 17 vs 18. but didnt find anything about theyre fitment with a 1" drop front and 3/4" drop in the rear. thanks in advance for the help
The Chosen One is offline  
Sponsored Links
Advertisement
 
post #2 of 6 (permalink) Old 06-05-2011, 05:57 AM Thread Starter
 
The Chosen One's Avatar
 
Join Date: Dec 2010
Location: Cincinnati Ohio
Posts: 40
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
also if i were to go with 18x8.5 on the rear would the 275/35/18 still be the choice of size
The Chosen One is offline  
post #3 of 6 (permalink) Old 06-05-2011, 05:58 AM Thread Starter
 
The Chosen One's Avatar
 
Join Date: Dec 2010
Location: Cincinnati Ohio
Posts: 40
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
what offset is needed for the front and for the rear
The Chosen One is offline  
 
post #4 of 6 (permalink) Old 06-06-2011, 06:35 PM
Former Moderator
 
svede1212's Avatar
 
Join Date: Oct 2005
Location: Grand Rapids, Michigan
Posts: 4,081
Mentioned: 0 Post(s)
Tagged: 1 Thread(s)
Quoted: 25 Post(s)
Garage
So I don't have to search all over what are the offsets on those wheels. They should be stamped on the inside. I think they're 45mm but want to be sure.

2004 Blk/Rd M6
6.3 litre LS1

Built and tuned by svede
svede1212 is offline  
post #5 of 6 (permalink) Old 06-07-2011, 12:43 PM Thread Starter
 
The Chosen One's Avatar
 
Join Date: Dec 2010
Location: Cincinnati Ohio
Posts: 40
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
im waiting to hear back with the offset. im in afghanistan and they wont let me have my car.damn government
The Chosen One is offline  
post #6 of 6 (permalink) Old 06-07-2011, 02:29 PM
Former Moderator
 
svede1212's Avatar
 
Join Date: Oct 2005
Location: Grand Rapids, Michigan
Posts: 4,081
Mentioned: 0 Post(s)
Tagged: 1 Thread(s)
Quoted: 25 Post(s)
Garage
Bastiges! The stock offset is 48mm. A smaller offset puts it whatever the difference is closer to the fender lip if you have the same wheel width. As you go to wider wheels and if you kept the same 48mm offset every inch puts " more to the outside and " more to the inside. Let's say in the future you do a 9" and the offset is 45mm. You'd be 3mm + 12.7mm ( ") or about a total of 15.7mm (0.62") closer to the outside fender, pretty doable. A wider wheel keeps the tire from bulging out the sides more so you can run bigger tires than you could with the same wheel distance from the fender than a narrower wheel. For 9" you'd like a 45-54mm offset but could maybe squeeze a few mm out without too much trouble. It is much better to have too much offset than too little. With too little you can jack the back end up like a 4x4 or whack the alignment up in the back. Either way you lose the benefit of the handling with wider rubber, the jacked up in cornering or the camber off in straight line traction and tire wear. If you have too much offset you can just put a spacer on to bring the wheel back out if you need to.

2004 Blk/Rd M6
6.3 litre LS1

Built and tuned by svede
svede1212 is offline  
Sponsored Links
Advertisement
 
Reply

  Pontiac GTO Forum > The 2004-2006 GTO > Wheels and tires

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Pontiac GTO Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
64 tire size? Jimconv64 1964-1974 Tempest, Lemans & GTO General Discussion 16 06-26-2013 04:34 PM
Tire Size GuatoLT1 2004-2006 GTO General Discussion 4 01-02-2011 01:35 AM
need tire size scy-co 1964-1974 Tempest, Lemans & GTO General Discussion 3 07-23-2010 10:31 PM
tire size Pontiac Tempest Cstm 1964-1974 Tempest, LeMans & GTO Technical and Electrical Wiring 6 01-02-2009 07:28 AM
help tire size? gtony Wheels and tires 0 06-04-2006 12:38 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are On
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome