275/40/WR18's On Rear???? - Pontiac GTO Forum
User Tag List

 
LinkBack Thread Tools Display Modes
post #1 of 9 (permalink) Old 12-26-2005, 04:19 PM Thread Starter
 
Join Date: Dec 2005
Posts: 202
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
275/40/WR18's On Rear????

Can anyone tell me for sure if a set of 275/40/WR18's would fit on the Rear of my 2004 GTO without rubbing? Any help would be awesome, thanks guys!
BlownGTO is offline  
Sponsored Links
Advertisement
 
post #2 of 9 (permalink) Old 12-30-2005, 03:48 PM Thread Starter
 
Join Date: Dec 2005
Posts: 202
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Anyone please? This would be a big help!
BlownGTO is offline  
post #3 of 9 (permalink) Old 12-30-2005, 11:17 PM
 
Join Date: Dec 2005
Posts: 94
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by BlownGTO
Can anyone tell me for sure if a set of 275/40/WR18's would fit on the Rear of my 2004 GTO without rubbing? Any help would be awesome, thanks guys!

With the correct backspacing they will work. I have 285 DR's going on mine.

Jody
camcojb is offline  
 
post #4 of 9 (permalink) Old 12-31-2005, 08:25 AM
 
Join Date: Nov 2004
Posts: 267
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
they will work with the right offset...but i dont know if the fronts will work with the same offset....personaly i like to rotate my tires because the gto is hell on the rears !!!! ...but, i like the look of super fat rears and "normal" fronts.
flht3 is offline  
post #5 of 9 (permalink) Old 12-31-2005, 09:39 PM
 
Join Date: May 2005
Posts: 53
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
275/35/18 would fit better then 275/40/18. The 40 series 275 will be a taller tire then the 35 series 275 (which is close to stock height).
John Millican is offline  
post #6 of 9 (permalink) Old 01-01-2006, 09:41 PM
 
Join Date: Jun 2005
Posts: 95
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by BlownGTO
Can anyone tell me for sure if a set of 275/40/WR18's would fit on the Rear of my 2004 GTO without rubbing? Any help would be awesome, thanks guys!
I'm running BFG 275/35/18 drag radials on the rear w/ 52mm offset. But I did have to roll my fenderss. I don,t want to get a blow out at 140.
wildchildm39 is offline  
post #7 of 9 (permalink) Old 01-05-2006, 11:03 AM
 
Join Date: Dec 2005
Posts: 1,083
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Here's a link that may help; it shows the impact of changing tire sizes, both profile and width, also calculates MPH difference if you're changing them on a speed monitored axle. From Miata.net

http://www.miata.net/garage/tirecalc.html
noz34me is offline  
post #8 of 9 (permalink) Old 01-05-2006, 03:07 PM
501 RWHP & 469 RWTQ
 
05GOAT's Avatar
 
Join Date: Nov 2004
Posts: 230
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Here is some info for you.

Results of yesterday's wheel & tire test fitting w/ ROH wheels:

Factory wheels & tires:
17x8 w/ 245/45/17
55lbs each (wheel & tire)
5x120mm stud pattern
48mm backspacing

17's
Front:
245/45/17 is still the best fit
255/40/17 fit but had to use a 8.5" wide wheel, the required backspacing hadthe wheels/tire sticking out too from the body line
275/40/17 didn't fit, using a 9" wide wheel, the tire was rubbibg the strut. Again using a different backspacing would have the set sticking out too far

ROH Drift R 17x8 w/ 245/45/17 - 47lbs
ROH Drift R 17x9 w/275/40/17 - 49lbs

Rear:
275/40/17 fit no problems on a 17x9" wheel
These stick out just a little more than the factory tires, but I think they still look great!

Recommendation for 17" wheels: Use your factory tires and and put them on 17x8" custom wheels or 17x8" wheel front w/ 245/45/17 tires and 17x9" wheel rear w/ 275/40/17 tires

Personally I would just reuse the factory tires and put 17x8" wheels at all four corners. This will be cheaper to do and looks good.

18's
By far the best way to go!!

Front:
18x8 w/ a 245/40/18 tire - fit is perfect
18x8.5 w/ 255/40/18 - again sticks out too far

Rear:
18x9 w/ a 275/35/18 tire - fit is perfect

Recommendation for 18" wheels: Without a doubt the best set is 18x8 up front with 245/45/18 matched with 18x9 out back w/ 275/35/18. This set looks great, fits porportionally and lets you pick up some width out back. The ride quality is also great. Or use 18x8 and 245/40/18 at all four corners.

ROH Drift R 18x8 w/ a 245/40/18 tire - 49lbs
ROH Drift R 18x9 w/ a 275/35/18 tire - 51lbs

19's

Front
245/35/19 on a 19x8" wheel

Rear
275/30/19 on a 19x9" wheel

Recommendation for 19" wheels: GO BACK TO 18"!! While the look great on the car the ride quality is horrible. If you could care less about feeling every bump in the road and want all the look, these are for you. If you just gotta have them then use 19x8 w/ 245/35/19 front and 19x9 w/ 275/35/19 rear or the 19x9 w/ 245/35/19 all the way around.

I have some pics from the fitting I just need to get them off of my disc. I'll get some pics of my Goat with the set up I'm going with and personally recommend,
18x8 w/ 245/4018 front and 18x9 w/ 275/35/18 rear. If I'd been working at Pontiac this is what I would have sold the car with!!

By the way, anyone interested in ROH or other custom wheels contact me I now have pricing and availability info!!

18X8 on front with 245/40's 18X9 on the rear with 275/35 Michelin Pilot Sport AS's
Unfortunately Boyd put a +48 offset on the rears and they rubbed, so I rolled the fenders. Boyd was willing to make another pair but I was tired of waiting. It's been about three months already. I think a +55 would be a perfect offset for these on the rear and Boyd could definately do that.


NEW BOLT PATTERN FOR GENERAL MOTORS 5x120mm

WIDTH OFFSET WIDTH OF TIRE
7.0 +26/+65 215/225/235
7.5 +33/+61 215/225/235/245
8.0 +39/+55 225/235/245
8.5 +45/+48 235/245/255
9.0 (MAX) +48 245/255

REAR ONLY
8.0 +36/+65 245/255
8.5 +42/+65 245/255
9.0 +48/+65 255/265/275
9.5 +55/+64 265/275/285

Offsets greater than shown above will rub on rear fender lip (25mm fender lip).

Another fella posted this: "I have a set of wheels from ROH, the rears are 18x9 51mm 275/35 and front are 18x8 41mm 245/40, with Nittos, no need to roll. BFG or Dunlop you may need to roll?"



I have 18x8' rims with 245/40/18 Toyo meats in the front and 18x9' rims with 270/35/18's in the rear.

http://www.cardomain.com/ride/2094213 My Goat



05 M6
Polished Maggie
278/286 551/551 115 LSA Cam
Spec Stage 3+ clutch
LT Headers
LPE CIA
GMM Ripshifter
506 RWHP / 479 RWTQ
05GOAT is offline  
post #9 of 9 (permalink) Old 01-02-2007, 08:57 PM
 
Join Date: May 2005
Posts: 937
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Hey, I am looking to upgrade from my stock 17s. I went to a place here named "WheelTec" and the counter rep found a wheel I like called a TSW Montage, 18", black with a machined lip. The wheel looks good by itself and on my Cyclone Grey I think the black and aluminum would look good. I told him I wanted 8" in front and 9" in back. He said 8.5 front and 9.5 rear is what this wheel offers for my GTO. With 245/40ZR18 front and 275/35ZR 18 rear. They would install Toyo Proxes T1R tires, roll the rear fender lip about 1/4 inch. The total quote was $1900. $165 for the wheels per, and $220 for the 275's and $183 for the 245's. The remainder is install and labor. I would appreaciate any feedback or opinions. Anyone familiar with the tires, anyone familiar with the TSW wheels? I was also considering Kumho Ecsta MX for tires, they would reduce the total to about $1800. Thanks in advance for any comments.
JMVorbeck is offline  
Sponsored Links
Advertisement
 
Reply

  Pontiac GTO Forum > The 2004-2006 GTO > Service, Maintenance and Technical Discussion

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



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