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Old 03-31-2013   #21
89JerseyGTA
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Re: Our wheels in bigger sizes, who's interested?

Looks greeat, almost like it was chopped.

Any difference w/ speedo ?
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Old 04-01-2013   #22
strc09
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Re: Our wheels in bigger sizes, who's interested?

Quote:
Originally Posted by prokilllsx View Post
Looks Nice! Details on wheels including specs? I wonder if they would make those with gold centers instead of black?
They're Boze Forged Mesh wheels. You can find them on Hawks website. When you order them, they'll be made to your specifications and size. Bruce was extremely helpful with this purchase and Boze has great customer service. These are the same wheels that are on Bruce's '91 Stormtrooper Formula. These wheels do come with a hefty price tag.

Quote:
Originally Posted by 89JerseyGTA View Post
Looks greeat, almost like it was chopped.

Any difference w/ speedo ?
Oh...no photoshopping here. Those are the real deal. Feel free to check out my CarDomain page for in-progress photos and a complete history of my car.

As for the speedo, it doesn't work correctly anyway. Ever since the T56 swap it hasn't worked right. I need a $300 box to make it work correctly even though I bought the VSS sensor for the T56. I do use my GPS as my speedo. As far as I can tell (by automated speed zones) there isn't a difference. If my speedo did work I would imagine that it'd be correct. These wheels and tires are about the same diameter as my stockers.
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GTA: Grand Turismo Americano (Grand Touring America)
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Old 04-06-2013   #23
YumikoGTA
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Re: Our wheels in bigger sizes, who's interested?

Quote:
Originally Posted by prokilllsx View Post
Not everyone thinks uniform appearance is always best. Look at some pictures of cars with staggered wheels set ups. Now, if you bow down at the 'my car is completely stock so it's the best' altar, then maybe uniform is for you. Personally, I don't have a pristine condition stocker. Ours stands out for other reasons. An aggressive stance is only going to add to its appeal.
Concerning safety...different wheel sizes don't necessarily mean different tire diameters. Regardless, the main contributor to de-stabilizing a car's handling would be large differences in contact patch or traction between the front and the rear tires. All this should be kept in mind when picking a wheel and tire combination for a ride. Looks? Well that's a matter of opinion and everybody has one.
Actually, my question was not at all in regards to the appearance of the mismatched sizes of rims and tires on a car. I could not care less how things look like. My question is on performances. I also did not mention anything about original or factory style. My question is would putting different sizes of tires on the same car have any negative effects of turning at high speeds such as on highways and sharp turns? Going straight ahead may not have any effects, however, in turns on the highway at higher speeds I think it is quite possible that it would have some negative effects compared to if the tires and rims were all the same size.

Yumiko
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Old 04-07-2013   #24
prokilllsx
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Re: Our wheels in bigger sizes, who's interested?

Mismatching tires "can" always cause problems. It can also improve a car's safety if done properly taking traction, weight distribution, and some basic laws of physics into account. Most people that that mismatch tires seem to have a tendency to stick the fattest tires possible under the rear without considering differences in traction, overall diameter or even body clearance. Properly done it can be a beautiful modification that also improves the car's stability, even around curves.
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Old 04-08-2013   #25
rhomanski
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GTA Year: 1988
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Re: Our wheels in bigger sizes, who's interested?

In 1977, a friend of mine died in a '67 Duster with a lift kit in the back and huge tires and small tires in the front. It rolled going around a curve one night. Ejected everybody but the driver. My mom sent the newspaper article to me when I was away at College. A good demonstration of why you need to learn your car.
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Old 04-12-2013   #26
1badGTA
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Re: Our wheels in bigger sizes, who's interested?

How about these:
They also look nice and deep

http://www.thirdgen.org/techboard/au...heel-18-a.html



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Old 04-12-2013   #27
strc09
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Re: Our wheels in bigger sizes, who's interested?

I like those Mike. They look good. With the exception of the bolts at the edge of the wheels they look like they could almost pass for the stock crossed lace wheels.
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GTA: Grand Turismo Americano (Grand Touring America)
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Built by Zeus Performance and tuned by Alvin from PCM4Less
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Old 04-12-2013   #28
1badGTA
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Re: Our wheels in bigger sizes, who's interested?

that's what I thought
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Old 04-12-2013   #29
GO_G8RZ
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Re: Our wheels in bigger sizes, who's interested?

Yes, I think so too. I've reached out to the guys who made these. Going to see what options there are for pricing/availability for our cars, assuming 17" and/or 18" diameter. I'm sure it will be pretty steep though.

Do you guys have any input on what width/offset would be best for our cars assuming no fender roll? I'm thinking 18x9 or 18x9.5, but not sure about the offset as I'm not familiar with wheel designs/specs.

Will update here and on TGO as I get more information. I am also updating a similar thread on the TTA site too.

Thanks!
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Old 04-12-2013   #30
GO_G8RZ
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Re: Our wheels in bigger sizes, who's interested?

Thinking about putting them on this:

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Old 04-13-2013   #31
strc09
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Re: Our wheels in bigger sizes, who's interested?

They'lll look go on your car just as they do on that GN. If they are forged wheels, I can tell you they'll probably be expensive. They look like they are a two-piece wheel. I recently bought a set of two-piece forged wheels (see picture attached above) and they set me back more than $2K for just the wheels. I would imagine these would be no different in pricing. My wheels are 17x8 for the front and 17x9.5 in the back so I didn't have to have the lip rolled. Had I gone with a 10 out back to accomodate a 305 or larger tire I would have had to roll the fenders. Also, if these wheels are made to order like mine were you can specify the offset and color you want when you place the order. Then again, this company may be different than the company I order my wheels from. Good luck and keep us posted.
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GTA: Grand Turismo Americano (Grand Touring America)
1 of 930 1988 Gunmetal Metallic GTAs produced (RPO 87U)
Built by Zeus Performance and tuned by Alvin from PCM4Less
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Old 04-13-2013   #32
esperi
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Re: Our wheels in bigger sizes, who's interested?

strc09,

What offset and backspace were your wheels? You've referenced it a few times, but never mentioned it. This would be very helpful to me as I am searching for 18s as well... But they don't have to be custom for me...Thanks!

-Eric
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Old 04-13-2013   #33
prokilllsx
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Re: Our wheels in bigger sizes, who's interested?

I would like to know too please
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http://prokillcincy.com/ LS1/4l60e, 3,200 Edge stall, 9 bolt w 3.91's
445 rwhp 381 tq. 11.20 @ 121, 7.15 @ 96mph 1/8 mile w/ 1.55 60 ft. New times coming soon.
http://www.youtube.com/watch?v=PrFkd1XxrEw
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Old 04-13-2013   #34
strc09
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Re: Our wheels in bigger sizes, who's interested?

Both front and rear are 7mm offset.
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GTA: Grand Turismo Americano (Grand Touring America)
1 of 930 1988 Gunmetal Metallic GTAs produced (RPO 87U)
Built by Zeus Performance and tuned by Alvin from PCM4Less
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Old 04-13-2013   #35
YumikoGTA
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Re: Our wheels in bigger sizes, who's interested?

That seems to be expensive to get your rims specially made. So if you put on the larger size, does this mean that the spedometer will not be accurate?

Yumiko
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Old 04-14-2013   #36
prokilllsx
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Re: Our wheels in bigger sizes, who's interested?

7 mm offset? Do you remember the backspacing? Maybe 5 and 1/2?
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http://prokillcincy.com/ LS1/4l60e, 3,200 Edge stall, 9 bolt w 3.91's
445 rwhp 381 tq. 11.20 @ 121, 7.15 @ 96mph 1/8 mile w/ 1.55 60 ft. New times coming soon.
http://www.youtube.com/watch?v=PrFkd1XxrEw
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Old 04-15-2013   #37
strc09
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Re: Our wheels in bigger sizes, who's interested?

Quote:
Originally Posted by prokilllsx View Post
7 mm offset? Do you remember the backspacing? Maybe 5 and 1/2?
I do not remember the backspacing. When I spoke with Bruce I told him I wanted about a 2 1/2-inch lip in the rear and a 1 1/2-inch lip in the front. The only reason I know about the 7mm backspacing is because I had to call Boze to send me different (taller) center caps than what came with the wheels. If you're interested in them, call Bruce at Hawks and tell him what you're looking for. He'll work with you and help you get what you want.

Quote:
Originally Posted by YumikoGTA View Post
That seems to be expensive to get your rims specially made. So if you put on the larger size, does this mean that the spedometer will not be accurate?

Yumiko
It's about diameter. Our cars came with a 245/50 tire. I believe that in order to not throw the speedo off you would have to match the diameter (profile) of the original size tire. When I placed my stock size 245/50 16 next to the 245/45 17 and 275/40 17 they were pretty close to the same height (a 1/4-inch or less difference). I have the same gap from the top of my tire to the fender as I had with my 245/50 16 wheels. So with my new wheels they are turning just as fast or slow as the stock size tires. I have not tested it with a radar gun yet (hopefully it won't be a cop and just one of those "Your Speed Is..." radars), but I'm pretty confident that whatever my speedo says is what will show up on the radar gun.
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GTA: Grand Turismo Americano (Grand Touring America)
1 of 930 1988 Gunmetal Metallic GTAs produced (RPO 87U)
Built by Zeus Performance and tuned by Alvin from PCM4Less
Check out my website: Night Vision GraFX
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Old 04-16-2013   #38
esperi
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GTA Year: 1988
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Re: Our wheels in bigger sizes, who's interested?

That sounds right by what I've found; Stock Trans am was 0 offset in front and +16 in rear. I found a useful site that gave these limits to the 88 trans am (and others):

http://www.bigwheels.net/index.php?l..._vehicle=Trans Am

Bolt Pattern: 5x4.75 (5x120.65)
Offset Range: 0 to 20
Wheel Size Range: 15x8.0 to 20x9.5
OEM Tire Size: 215/65-15 (215x661 mm)

The site does not allow 5 x 4.75 to mate to 5 x 120, but they are literally a "hair" difference in size. since 4.75"=120.65mm

I also used the tire calculator on ThirdGen.org:

http://www.thirdgen.org/techboard/ti...calculator.php

With these #s, I took a chance and purchased a new set of overstock 18" Staggered Stern st-7 Wheels for $300 (for 4!) that were: Front 18 x 8.5 +13 offset, Rear 18 x 9.5 +15 offset. I'll get them on the GTA in a few weeks. Can't Wait!

Eric
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Old 04-16-2013   #39
esperi
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Re: Our wheels in bigger sizes, who's interested?

This opens up the option of BMW rims on our cars if the offset is in range.

Here is the Black GTA with a "photoshop" of the Stern ST-7 Hyper Black I'm getting:
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File Type: jpg 89GTA-with stern wheels small.jpg (783.1 KB, 13 views)
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Old 04-17-2013   #40
1badGTA
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Re: Our wheels in bigger sizes, who's interested?

Quote:
Originally Posted by esperi View Post
This opens up the option of BMW rims on our cars if the offset is in range.

Here is the Black GTA with a "photoshop" of the Stern ST-7 Hyper Black I'm getting:
BMW rims were what GM was copying at the time when they made the GTA they wanted the euro flair with the paddle (BMW) style mirrors too. thats why the GTA is not my favorite. it was a F body trying to be something it was not, a BMW.
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