Will these rims fit my Opel?

[73OpelMan]

http://cgi.ebay.com/ebaymotors/Nippo...67252261QQrdZ1

These are a great price for me right now and I think they would look awsome on my car, but I was wondering if the bolt pattern and size, width, and whatever else there is to know about it is able to fit my Opel GT? Right now there are 13" rims on there and I want 15".

[jordan]

Please.....PLEASE, use the search feature. This subject has been beaten to death and there are many threads already about wheel sizes, offsets, widths, styles. But to answer your question, The bolt pattern is correct but the offset is way off to fit on an opel.

[WannaBOpelOwner]

correct me if im wrong but isnt the offset for and opel like 73 or something

[jordan]

Instead of guessing and throwing random numbers around just read this... http://www.opelgt.com/forums/3d-whee...t=wheel+offset

[kwilford]

Moderators, please move this to the Wheels and Tires Forum and see if they can look around for the answers there

It's pretty simple. GT's can tolerate up to a 4 3/4" backspace, but that depends on the specific wheel and tire. Just about ANY 4" backspace wheel will work. Many 4 1/2" backspaces will fit.

Backspace is also simple to figure out. Take the nominal wheel width, add 1/2" for the bead edge, divide in two, and add the offset (assuming it is positive, which they pretty much all are). These wheels are 6 1/2", add 1/2" gives 7", divide by two gives 3 1/2", add 38 mm (divide by 25.4 to get inches, equals 1 1/2") gives a 5 inch backspace. That won't fit.

Which confirms what Jordan just said, but now you can figure it out yourself. MANY threads in the Wheels and Tires Forum on this subject if you forget.

[opelbits]

Have a look at these:

http://cgi.ebay.com/ebaymotors/FOUR-...QQcmdZViewItem

They are 15x6 ET23. Might be a tight fit on a GT.

The wheels on my GT (the orange/red one in my album) are MSW 14x6 ET13 offset.

[soybean]

I believe this is the article Keith was refering to by the late John Seaman. Post nos, 2 in the link Jordan provided. Hth, Jarrell

[GTJIM]

"Will these wheels fit?" is the wrong question - "Will these wheels affect my car's handling and steering?" is the question that needs to be asked first!

The stock 13" X 5J wheels have an offset of 28mm, I believe. This means that the centre of the tyre is on a line 28mm inwards of the surface on the rotor that the wheel bolts to....
ANY rim has to closely match this position for its centre line so that the steering geometry is maintained. About + or - 10mm is the maximum difference of offset that is allowable.
So Offset needs to be between ET18 and ET38 FOR ANY WHEEL - on the front. The rear has no need to comply to this as steering is not involved.
With 4 1/2" being the maximum backspace that will fit then the maximum front wheel width (for tyres near stock height) is 4 1/2" minus offset (28mm is about 1") X two. 4 1/2" - 1" => 3 1/2" X 2 => 7"

The offset remains the same (28mm) for any width of wheel. So for wheels with larger offsets the only way to maintain steering geometry is to use spacers which reduce the offset to 28mm - with all the issues attendant with using spacer.

For instance with wheels having and offset of ET45 a spacer of 45 - 28 = 17mm thick should be used to keep the steering geometry in spec.

[73OpelMan]

Woah,

Ok, first, for those of you who are now mad at me for posting in the wrong area I am sorry. Im not going to give excuses on why I posted because there is none. I had a question, I asked.

Other than that, most of you helped me more than I needed to be helped and I thank you for that. Even though I will never remeber or probably never try to figure out that math . But looks like I cannot use the rims I wanted to, ohwell.

Spencer

[deaner]

No you can't use those rims, but you can use the ones I have for sale. The second set will fit if the offset is correct. But the tires are a little tall. Yes, another shameless plug for my rims. Check them out in the for sale sections.

[baz]

Originally Posted by deaner No you can't use those rims, but you can use the ones I have for sale. The second set will fit if the offset is correct. But the tires are a little tall. Yes, another shameless plug for my rims. Check them out in the for sale sections.

now thats the way to advertise in general

[jvandyke]

I don't have a GT yet but I like these wheels?
Would they fit a GT?
http://cgi.ebay.com/ebaymotors/ws/eB...RK%3AMEWA%3AIT

[namba209]

Originally Posted by jvandyke I don't have a GT yet but I like these wheels? Would they fit a GT? http://cgi.ebay.com/ebaymotors/ws/eB...RK%3AMEWA%3AIT

Sorry, they're close, but no cigar. However they will fit on my 75 monza. Thanx for the link. Lessee, cheap buy, I hope, $12 each to send to Anaheim Plating, $75 each to chrome plate, then I'll have 13 of those chrome plated. 5 for Willit? 4 on the trailer and 4 on the monza.

Hey, Gene, how far from you are they?

[BQS4]

they're about 3 hours Ron. They're down near Macon, GA BTW Ron, I can ship the wheels cheaper than they can.

[namba209]

Originally Posted by BQS4 they're about 3 hours Ron. They're down near Macon, GA BTW Ron, I can ship the wheels cheaper than they can.

"Don't you just know it" ( Hughey Smith and The Clowns). That's the reason I asked distance from you, (calling out for a favor, if I get them).

[baz]

Originally Posted by BQS4 they're about 3 hours Ron. They're down near Macon, GA BTW Ron, I can ship the wheels cheaper than they can.

not that far gene its about 1 1/2 hours from you + atlanta traffic time so maybe it is 3 hours

[BQS4]

That's cool Ron

[BQS4]

Originally Posted by baz not that far gene its about 1 1/2 hours from you + atlanta traffic time so maybe it is 3 hours

I meant as a round trip Baz

[Sparky73]

Wouldn't those first rims posted fit? With a spacer they should be fine I would think. My rims were 15x7 with a 40mm offset. Used a 1" spacer and they were fine with the lower pro tires.

[RallyBob]

Originally Posted by Sparky73 Wouldn't those first rims posted fit? With a spacer they should be fine I would think. My rims were 15x7 with a 40mm offset. Used a 1" spacer and they were fine with the lower pro tires.

Close but no cigar! Monza and Vega have a 4 x 4" bolt pattern. Opel has a 4 x 100 mm (3.937"). While you can physically fit the Monza wheels onto the Opel studs, the lugnut tapers do not match correctly, and they can (and have) failed.

Edit: Just realized you may be refering to the old posting, not today's! If so, disregard my response!

[kwilford]

Originally Posted by namba209 Sorry, they're close, but no cigar.

Technically, Ron is correct, as they are 4x4", so 101.6 mm versus 100 mm required. Some folks claim that, with a bit of "forcing", they can fit. I wouldn't recommend that. However, as I have posted before, there are a number of wheel repair shops throughout the continent that routinely repair wheel stud holes by re-drilling them and pressing in steel inserts. At only 1.6 mm of difference, or 0.031" (31 thou) per hole, I am quite certain that these could easily be changed to the correct bolt circle.
JM2CW

[namba209]

First a bit of clarification. Those wheels will not use tapered acorn nuts, they have to be used with sleeve nuts and washers which are fairly thick walled, so more than .030 will have to be drilled out just for the sleeves which my handy dandy calipers says is .677" diameter. Because they are not hub-centric, the nut sleeves bear the weight of the car not the axles, so a sloppy fit could be disasterous. BTW, these wheels are Shelby Cal 500 and should fit nicely on the monza, although my original plan for it was to be a totally stock looking "Sleeper". Oh, Well, the best laid plans............

[namba209]

Somebody wanted them more than I did, so I guess I'll go back to plan A on the monza.

[jvandyke]

Did you score them? and, why wouldn't they fit? For future reference?
I'm trying to figure all this stuff out. I think I'm starting to get a handle on it.
These were: 13 X 5.5 - 4 on 4.00 GM bolt pattern with 3" backspacing
is it just the bolt pattern wasn't quite right, but the spacing would have been okay otherwise?
EDIT: well, I should have read the latest posts as that seems to answer my question, sorry, didn't see those in time.

[namba209]

Not a problem, the wheels I had previously on Willit?, had a back space of right at 3 1/8" back space and would rub the rear of the wheel well during full lock, so possibly a 3" back space would be just about right. The would be moved inside the well by an eight of an inch. HTH.