LS1GTO.com Forums banner

1 - 20 of 35 Posts

·
Registered
Joined
·
102 Posts
Discussion Starter #1
Looking for technical specs on GTO wheels.

Has anyone found the width, offset, bolt circle, and lug size
of the wheels that will be on the GTO?

I am looking to swap out the wheels quickly.
I don't want to take any wheel seller's word on the correct
size.


Impulse Blue/Blue MN6 on order
Anticipation is great.

Carguy in Michigan.
 

·
Registered
Joined
·
3,255 Posts
Dang,
The tires are 245/45ZR17 KDWS. I remember somewhere in one of this forums some one posted that other stuff. They will come by and answer eventually or you can look through all the posts.

:drink: :drink: :drink: :drink:
 

·
13 year owner
Joined
·
16,379 Posts
All that stuff was tire size I believe. I don't know any of the specs on the wheels. I wouldn't bet the house on it, but my guess is that they aren't too far off the 18's used on Vette's and on a standard Chevy 4.5" (or is it 4.25") bolt pattern. I can never remember.
 

·
13 year owner
Joined
·
16,379 Posts
Ok, for those of us that don't prescribe to the metric system, I went and converted them

35.42mm = 1.39449"
120mm = 4.72441"
 

·
Registered
Joined
·
61 Posts
Bolt pattern

CMNTMXR57 said:
All that stuff was tire size I believe. I don't know any of the specs on the wheels. I wouldn't bet the house on it, but my guess is that they aren't too far off the 18's used on Vette's and on a standard Chevy 4.5" (or is it 4.25") bolt pattern. I can never remember.
5x4 3/4 is the spacing.
 

·
05/06 AEROFORCE HERE NOW!!!
Joined
·
2,352 Posts
If you go over to the wheels/tires section or do a search there's a ton of info.

5x120 does not equal 5x4 3/4...yes some have bolted them up, but it's not advisable to run them all the time...in other words, don't use fbody wheels

make sure the wheel is hub-centric and not just lug-centric...the weight of the car should be resting in the hub, if it's on the lugs, you're in for an accident
 

·
2010 Camaro SS Owner
Joined
·
408 Posts
Snafu said:
If you go over to the wheels/tires section or do a search there's a ton of info.

5x120 does not equal 5x4 3/4...yes some have bolted them up, but it's not advisable to run them all the time...in other words, don't use fbody wheels

make sure the wheel is hub-centric and not just lug-centric...the weight of the car should be resting in the hub, if it's on the lugs, you're in for an accident
Is there any reason not to remachine the taper for the nuts to an actual 120mm bolt pattern so people don't have to throw out f-body rims or not have the option of buying other new 120.65 rims? Christ, you only have to move the bolt pattern in about .013 radially. I figure you would have to drop the taper down about another .030 at the new location to ensure full engagement on the 120mm pattern. Yes, I are a machinist with a PHD (push here dummy).
 

·
I like boobs.
Joined
·
6,581 Posts
5x120 bolt spacing, 48mm offset (stock 17x8's), 69.5mm center bore

Do a search in this forum for info on what you should use for wheel offsets for different size/width wheels and tires without having rubbing issues or a froggy looking retard car.
 

·
No mo' GTO.
Joined
·
3,969 Posts
CSiJason said:
5x120 bolt spacing, 48mm offset (stock 17x8's), 69.5mm center bore

Do a search in this forum for info on what you should use for wheel offsets for different size/width wheels and tires without having rubbing issues or a froggy looking retard car.
This info will come in VERY handy. Thanks, Jason.
 

·
I like boobs.
Joined
·
6,581 Posts
This may be even more handy...

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)
 

·
Registered
Joined
·
217 Posts
CSiJason said:
This may be even more handy...

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)


Ahhh the offset Bible.
I was wondering when that would show up again.
Spent many a website searching with that.....and found crap :(
 

·
No mo' GTO.
Joined
·
3,969 Posts
CSiJason said:
This may be even more handy...

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)
:hail: You're right. That is handier. Are all of these measurements that have been tested? If they are, you saved me a sh*tload of work & calculation.
 

·
I like boobs.
Joined
·
6,581 Posts
This was determined by the folks at discounttiredirect.com I do believe.
 

·
No mo' GTO.
Joined
·
3,969 Posts
CSiJason said:
This was determined by the folks at discounttiredirect.com I do believe.
Works the same, I suppose. They have the free time to swap out different combos.
 

·
Registered
Joined
·
6 Posts
CSiJason said:
This may be even more handy...

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)
Do these numbers apply to stock or rolled fender lips?
I'm wondering how much could be fit up front with a heavily rolled fender lip, custom coilovers to get the perch out of the way on the inside, and maybe camber plates if anybody ends up making some.

Right now I think a wide 265 on an 18x10 rear looks doable, and the same 265 pinched on an 18x9 could perhaps be made to work up front, with enough negative camber...??
 

·
No mo' GTO.
Joined
·
3,969 Posts
Damn, JZR, don't be greedy on the tire size. 18"x10" in the rear may still require notching the control arm in the rear. an 18x9 in the rear with a 265 tire will work fine. A 265 on a 10" wide rim will make the tire look too small for that rim. A 265 on front may be out of the question. Some people are having problems fitting 245s on front. I'd say a 245 for the front would be the limit.

Rampage, PM CSiJason. He has or can have made some of the hubcentric rings for that combo.
 
1 - 20 of 35 Posts
About this Discussion
34 Replies
19 Participants
holler
LS1GTO.com Forums
LS1GTO.com is a forum community dedicated to the LS1 Pontiac GTO. Come discuss mods, horsepower, engine specs and more!
Full Forum Listing
Top